Customer Ratings & Reviews

As expected

Could have a better way to decide which wire to use as positive or negative. Only has spaced print on one wire.

beau produit

Belva est une marque qui se rapproche de la marque stinger a premiere vue.bon produit.

Great wire

This is some great speaker wire looks good works good and you get so much for so cheap

good

Pretty well made box. The sub hole was a little too small for my 12" hcca but a little cutting solved that. I didn't have time to make my own box so this suited me realyl well.

good product

Sound really good and looks good. Made fairly good. Would for sure recommend

Very very nice, exact specs below.

Very nice box. The carpet is nice and seems to be glued properly, although it does look like it might rub off in time. Build quality is very nice, feels very sturdy. There are some globs of dried glue on the exterior but nothing I can't get over. It would have been nice to not have the sub cutout so close to the port but that's just nitpicking. Doesn't come with wires internally but the terminals are much nicer than I've seen on other prefab boxes.
Regardless of what Belva has published, this box is not 1.8 ft.

The gross volume is 1.97 ft, but after taking into account port displacement, it's net volume is 1.30 ft. It's also tuned to 34.4 Hz. Determined using the Torres Speaker Box Calculator.

well built box

For the price it cannot be beat. This box meets the recommended size enclosure for the single sub i ordered, which is the Rockford P2D4. Ported to trick the sub its in a bigger box with poly fill lining. Well built and carpeted in dark gray. I highly recommend it. Hits lows hard and loud.

Not bad

So I bought one of the "Sonic Boxes" a couple years back and it was similar to this box but gray. The sonic box was better build quality. This box has a hole cut that is nowhere near center. It's up and to the right a bit, but that's what you get for a 55 dollar box I guess. The carpet around the ported has started to come unglued and the box hasn't had any play time what so ever. It seems to be mdf and 3/4". The dimensions are correct. Port tune is around 35 hz and net box size is around 1.4 cubic ft. The poly fill probably needs to be glued down so I will stay inside the box. The port used to be rounded on the inside with the sonic box now it is not. It is a good box to get by on since it is built pretty well, but I would recommend getting a box built to spec for the woofer you have for optimal sound. For 55 bucks it's not a bad way to get by, just don't expect the best for that price point.

Great Prefab box

I would highly recommend this box it sounds like it is tuned between 34-36hz hits lows really good unlike i was expecting since it is vented. I had a rockford fosgate p3 and it sounded amazing in the box and now I have an Alpine type S in there until my new p3 comes back in and the type s even sounds great i didnt think a type s would pound like it did. Good box would def recommend and buy again if need be.

Great product

Slim and powerful speaker that packs massive power for a great price.

Worth the space

I downgraded from a much larger box to this one and noticed no difference. Saved me some space, though it's still pretty big, and handles the sub perfectly. Feels sturdy and looks good.

Awesome box

This box sounds great coupled with a Pioneer Champion Series Pro and 1500 watt amp. Very deep bass tones and very loud. Definitely would recommend.

Belva

This cost more then the gray one but they both perform the same just that the black exterior looks way better then the gray

Awesome

Great wire, for a great price! Love the color and looks very professional.

Great

Greatest box I've owned sounds great in a smaller car I had it in a bigger car and would have needed two to get the bass I wanted outta them but then I bought a ford fiesta and it's smaller so it sound great and is perfect for my little car

great boxes

Great construction. Good solid connections for your speaker.If I needed another one. I would look no further.

Nice Box

This box will definitely help the RIGHT sub put out some serious bass.

Great strong box

Great box, solid construction, easy set up. I personally prefer an exterior terminal connection that is a push type, but this screw type works just fine. I highly recommend.

Solid for a cheap option

I used this with a JL Audio 12WX sub powered off a Polk Audio amp giving it 200 rms. The box produced great output considering the entry level power and for a non-audiophile the clarity will be fine. Yes, a custom made box is ideal but if that's not an option for you then this is a suitable alternative.

AWESOME BOX!!!

I dropped my Fosgate P3 into this box and HOLY CRAP!!! I had this sub in a sealed for a while and thought it was loud.....but now its insane!!!! LOUDER THAN HELL! GET THIS BOX IF YOU HAVE a TYPE R OR P3!!

Good value

It’s listed as (cca) which is copper clad aluminum wire and is cheap and doesn’t hold up good to high wattage. Aluminum isn’t the best audio wire, but it is copper clad and electric signals travel on the outside of the wire and that’s where a multi strand wire would come in handy. I think it’s a judgment call, but I wouldn’t buy it.

Great Box

I bought this for my RE sex sub and sounds perfect. my sub is a 12in sub but i had to get the sub cut out widened. Local car audio place did it for free.

ESSENCIAL NEEDS

WOW HOW VERY FLEXABLE AND THE RED
REALLY GAVE SOME KILLER LOOKS. WIRE
VERY GOOD.

Decent speaker wire.

Speaker wire is good. It works as speaker wire should.
My only grief with the wire is the thickness of the insulation. It's really thick, and in my opinion, too thick.
I have a very high quality wire stripping tool, but the thickness of the insulation made it next to impossible to center the speaker wire and my stripping tool always cut a bunch of strands of the wire. Not a real big deal in the grand scheme of things, though.

By Anonymous on May 18, 2019 Verified purchase

BEST BOX EVER

MY MUSIC IS SO LOUD NOW. I LOVE IT!! NO ONE LIKES TO SIT IN THERE WITH THE VOLUME UP. ITS AWESOME! AND SONICELECTRONICS GOT IT TO ME IN A TIMELY MANNER! THANKS!!! CARPET IS GREAT! PERFECT SIZE TOO! I HAVE A SWR12D2 ALPINE TYPE R. JUST ONE!

Perfect Specs for JL 12W3V3 Ported Enclosure

I searched for a decent sub enclosure that would match the JL Audio specifications for the 12W3V3 in a ported enclosure.
This sonic sub box was a near perfect match for specified enclosure volume (1.7 cuft) and port tuned frequency (31 HZ, after measuring the port size, length and using online calculators).
Shipping was a little expensive (30.00) but it arrived in a day and 1/2. The box is solid and well constructed- not perfect- it has a hand built appearance- but it is sufficient.
The JL sub fit in the opening with no issue. The terminals are light duty but also sufficient.
After much research and deliberation, I did add some layers of poly fill batting to the walls of the enclosure's interior. I bought some pre-cut 1" thick pads from the fabric store- they were sold as baby crib side cushion padding. I put one layer on the top, bottom and left and right sides, being careful not to obstruct or block the entrance to the port slot. I put two layers on the wall directly behind the woofer. now the woofer back wave sees a group of nicely padded walls.
Again, after reading the pros and cons of doing this with a ported enclosure, I took a chance and did it before listening to the speaker- I wanted to get it right the first time I put it together. I had a hard time with envisioning running the sub with no padding on the interior walls.
The results are paying off- I seem to have plenty of output from the 12W3, and it is absolutely tight and deep when compared to other ported subs I have heard, and there is zero unwanted port noise- and no muddiness or booming.
The sound is right on the money- absolutely perfect and exceeded my expectations.
My only issue is the size of the enclosure- it takes up about a third of my small SUV's cargo area.
In the future I may try to find a much smaller enclosure and go sealed, about a third less volume than the JL specs for sealed, and maximize the volume with a complete polyfill stuffing and see what that sounds like. Maybe not though, this one sounds like a winner with the JL 12 W3 and it isn't even broken in yet!

Great add-on!

Always nice to get freebie with purchase. Belva is always making quality stuff!

By Anonymous on November 7, 2019 Verified purchase

Best box I've ever bought

I can't believe I didn't know about his website before now.. This box was worth every penny I spent... Great quality and amazing support when I had questions.. Will definitely be ordering from them again

Banging

Good box for the money. Sounds great!! Feels durable. Nothing to complaint about. Always been the vented type guy.

great buy

Its a wonderful box, I'm enjoying it right now, it sounds good in my Honda Accord.

Awesome box, BUT DON'T buy thinking your going to hit low notes

Really good box but don't buy thinking you are going to hit the low notes. Way better then sealed!!!

All i can say is WOW

Well, i bought this box with a 12" rockford t2d2 to place in it. I noticed this box was around 40 pounds and my sub was around 70 pounds.

I was a bit skeptical at first when i placed it in, thinking the box would break. I have been pounding the living hell out of that sub and it has sounded clean, loud, and incredible... Perfect amount of air space, 1.8 cubes.

Def would recommend this to anyone...

nice enclosure

This was a very good enclosure not cheap made at all I got a jl w3 12" in it and it sounds very good better than my 2 12 inch pioneer in a seal box

Great value

I bought this boxes wondering what it would sound like I put my candy red audio pipe in that box Ty really gave my the boom i was looking for overall great box i would recommend it

nice box

Nice box,good bass tones,Great price,thinking about getting another for the car,

Just got it all installed, love it.

Pros, loud as hell! Cons, its a really deep box. Got the Boss phantom subwoofer installed into this box, and couldnt be happier! I only just got it installed, but so far, it's been unbelievably loud. Recommend it for sure.

Worth the price for the convenience.

Made installation a snap without having to build something. Sounds great.

It is a good box

It is a really good box the only problem i have is with the terminals and the terminal cup. For one thing you might want to put some silicone around the inside to seal it off and the other thing is that the terminal nuts get lose and the terminals touched each other and blew out my sub. So if u buy this box make sure that the nut are TIGHT!!!! If not it will losen up and the terminals could touch and blow your sub.

nice

Pretty good box mine was broke but it was probably a rare instance

Awesome Value

This sub is awesome it looks simple and thats what i like about it. Theres more than meets the eye on this sub. It hits a lot harder than i expected and powered with the right amp it will be all you expected from this JL sub. I recommend this sub to anyone especially for the price listed. :D

Great value

Definitely get your moneys worth! Would be even better to receive complimentary gifts.

By Cameron on August 2, 2020 Verified purchase

Thick legit wire!

I use the wire for my ground and my 12v wire! This is good quality wire.

By JayBass on December 13, 2017 Verified purchase

Belva 1SV12B

This box is well vented.. Made professionally, looks nice, and bumps HARD with my Rockford Fosgate sub. It pounds the hell out of my big car. Fantastic and well worth the money.

Sonic Sub Box: 1SV12

Forget for a moment the price. The house system has a separate low end amp as such powered base cubes were not considered. (These became parts of a replacement).
Loaded with Fosgate P2s they work excelent.
Modifications:
Egg crate foam added inside except for port area.
1.5" wooden feet added for appearance and getting the cone area out of vacuum cleaner "range".
Suggestions.
Although the price was great I would gladly have gone a few more bucks for wood venear.
Down firing seam to be better. Would be nice if ther were that version even if somewhat larger. Size increase depending on driver characteristics.

All in all................
Good price and low hassle. The best recommendation is they need be heard, or do I mean felt.

Best box for Alpine Type R

I saw a lot of other boxes for all around the same price and the reviews were so mixed. A buddy of mine has two type r's in the basic Alpine boxes and it doesn't come close to how loud these boxes are. Personally, the 3/4" MDF/polyfil combo produces a much deeper, better bass than all of the other boxes. GET THIS BOX IF FOR TYPE E/X/R or any subwoofer that it fits the Ported Enclosure Volume range!

It is 27 December 2014 and I installed my Type R in this box with an Orion CO2400.1D amp and SoundQuest 2F Capacitor around Thanksgiving of 2014. It sounds amazing!

enclosure

for what it is the enclosure is well built and worht the cost. but for the application it ws recomended for its acctually to small. way to small for the sub but still worth the money if nothing elese for the quality of the build.

This box works well

Paired with an alpine type r it works very well and adds much boom to my system I have no issues with this box at all not a custom but solid sounds good and much More easy to come by if you don't have time or restores to build your own, before this box my bass was loud after this box my bass was a bomb

Clean, Crisp and LOUD!

I have just ONE of these... It is hooked up to a 5 channel RF amp and it is getting about 360-365 watts rms power. I have it in a custom sealed enclosure which is 1.35 cubic feet. I used bass box pro to determine my box size. It is tuned to about 45hz. The sound is Crisp and Clean, no matter what I am playing. I like Rock, Country, Rap, Classical and Jazz. The bass is very clear.

I used to have Rockford 10s (2 of them) and they were loud, but not as crisp. This ONE 12 is Louder and Clearer than those 2 tens were. I have this in my Truck, so one is just fine... Does everything I want it to do.

I am more of a sound quality guy, and this sub is great for SQ. Although it will push some SPL as well... but I was mainly concerned about sound quality, so I went with this. From everything I have read on the W3, it is made for SQ, and so far, I couldn't agree with what I read more. Between the subs I have owned and what friends of mine have owned, I am familiar with the sound and capability of Rockford, RE, Alpine, Kicker, JBL, MTX, Boston Acoustic, and JL... So far this W3 is my favorite. The W7's are nice, but more than I cared to spend and require a much more powerful amp. The W7 is more for spl anyway. Rockford, Boston acoustic, and JBL, are definitely for spl, while this W3 seems to give the best SQ I personally have heard so far. AND, It still produces a good amount of spl.

This sub has seemed to get louder after I broke it in for a few days, and Now I am getting ready to turn up the amp. So far I really Love this sub, and if you read my review and see yourself in a similar category as far as what you are looking for, Then I would say to just get this. The price is good on sonic and it is worth every penny. I am very satisfied that I bought this sub. Very well made...

Great!

Ive had no problems with this box.

pretty solid

I had a 12" Alpine Type X in this box. For the first year it slapped pretty hard and I had no complaints about the level of sound it would put out. I would be pleased but after a little more than a year my sub ripped the faceplate off of the box, or whatever u call the wood that the sub attaches too. All in all, this box would be great for a sub that is around the 500 RMS range, just be careful with big subs.

awsome!

I baught 2 of these last year from sonic and all i can say is WOW!!! jl really showed off and put there foot into W3. the sleek look and the power they can handle puts them way above the comp. be careful not to UNDERPOWER them because u will damage the voice coils!! must have them in the right enclosure for max output! would recommend to any one for medium to compitition grade!!

Bang for the Buck

I had the 12W3v2-D2 and loved them, well 5 years later and my stupidity while installing speaker covers (which were the wrong ones anyway) they got ruined, replacements were impossible to find. So I found a great deal at Sonic (local shops wanted an extra $100 a piece) and ordered them right away. Shipping was fast and right on! Installed subs, and loved them as much as my previous ones. After some break in, I noticed the bass was hitting a little harder than the previous version, even though they are only a single voice coil! I only have about 300 watts running to each sub(actually slightly less) and they still sound great! When I hooked my system up originally I wasn't looking for obnoxious bass, but turn these bad boys up and even with the little amount of power, they bang and bang hard!! Perfect for my enjoyment inside the vehicle, without the crappy sound on the outside of the vehicle, plus no worries about being pulled over!! If I have the money in the near future I would love to throw a class D 1000 watt amp to them and hear them really scream!!!!! BUY THESE SUBS AND SAVE SOME CASH!!!

sturdy but bad port design

I put a alpine type r in this in my 2000 ram ext. Cab on the back seat and I can hear air rushing through the port I wish I would have went with a sealed box and the hole was off center this box would be good for a trunk of a car

Boyfriend Loves this box.

I purchased this box for my boyfriends Xmas present. He absolutely loves it. It's built strong, good insulation, love the look and overall it makes a speaker sound wonderful. His Planet Audio sounds 10x better than it ever has. Only complaint was the wiring area. Complicated to wire through so we ran them trough the port. Just as easy works just as well.

Well built

I purchased this box for a 12' kicker cvx. First of all this box was built well and very sturdy. However, the sub I installed needed a little more air space. I would recommend this box for any subwoofer under 600 watts.

Best Sound Quality

"BEST" Box ever. I have a JL Audio 12W7 on JL Audio 1000.1 and this sub hits HARD. MY friend asked why my sub hits harder then his 2 12" Audiobahn Immortals. I Would RECOMMEND this box for serious Bass

Nicely built, sounds great.

The box is very nice. It has polyfill in it, the polyfill is not secured very well it is probably best to go through and glue it down, and is built very nicely. The box will (more than likely) splinter when you try to screw holes into it but its MDF and that's what MDF does. It sounds great with an Orion XTR PRO 12 4 in it and hits lows very nicely.

I would definitely recommend to anyone who was looking for a relatively cheap but nicely built box.

Wow, this sub is amazing.

When I bought this sub, I thought I was gettin a good quality, mediocre sound quality and loudness subwoofer. WOW was I wrong. This sub KILLS my friends' Alpine Type-R's and Clarion 12" subs. It is amazing. The SPL is crytal clear, but it still gets loud enough to rattle my trunk. All of this is running at 300watts(which is RMS)! JL makes a great sub. Period. After my sub was installed, I had my friend come over with is 03' 325i with 2 12" Clarion subs. I asked him if his bass was all the way up and he said yes. I was SHOCKED. It hits twice as hard. no joke. This is without a doubt the best sub for the money, hands down.

Great Box

Would definitely recommend this box. Put a Fosgate T1 in this box and it sounds really great. Didn't think it would have enough volume for the sub but it is awesome. One of the cons when I received the box the carpet was comin off on one side, but nothing some good old adhesive spray can't fix.

Well worth it

Bought this sub to upgrade from a 12wx. Installed it in the box that the 12wx was in with the same Kicker 300.1 (351 watts at 2 ohms birth-sheet) and it hits easily twice as hard with much better better SQ without even being broken in yet. When the weather gets warmer I want to get a second one and build a custom box for the two and a new amp.

One con: For some reason the metallic badge thing on the front doesn't have the W3 logo on it, it just says JL.

great sub

I have two of these in a 95 camaro. I have a 1600 watt hifonics amp to them in a ported 3 cu box (1.5 per sub) and an orion hcca ten with a power acoustic ps2-2600 amp bridged to it and my setup hit about 154 DBs! Best sub for the money. I was never a jl fan until a friend talkd me into buying these.

JL Audio 12w3v3-2

This sub hit harder than you would believe. I have it in a self-made down firing box. Located in the back of my Jeep Wrangler. It's being pushed by a 500w mono JBL amp. The sub hit so hard I have to turn down the sub volume. Just keep in mind the size of your box is very important. Also don't stress too much over getting your settings for this sub just right. All speakers have to be "broke in" before you get there full potential. So you'll just be make more changes to your settings in about 30 days. In the end, I love this subwoofer!

Cut out (inches) was not accurate

I used this box with an RE REX 12" and the hole was not big enough. I'm too lazy to go back and dig up my measurements, but the hole was a tad bit smaller than advertise.

Bang for your buck isn't a reality with this one.

This is an EXCELLENT driver, one of the best 12's for sound quality, i should know, i owned 2. But even better is the massive audio hippo. i got mine on sale months ago on sonic for the price of 1 W3 and it just hammers! It is very loud for one 12, but it has great sq. If you are on a budget, but want loud freakin bass without sacrificing sound quality, i recommend the hippo 122.

Awesome box for the price

Great price. This box is constructed well and looks great. I put a CVR12 in this box and it sounds a lot better than my old small sealed box setup. I would definitely recommend this box.

Um Yeah !!!!

If your questioning the quality of this enclosure. Question No More. It is built sturdy, solid (not dry) MDF, all corners are properly sealed, last but not least they even took the extra step in making the Tuned Port Wall with a Rounded Edge!!!! I don't care who you are thats A GREAT DEAL!!!!

Perfect for the EARTHQUAKE SOUND Tremor -X124
P.S Remove the Terminal Box and throw a bead of silicone around it. It will eventually allow air to escape.

Great bang for buck

Had this box with an RE Audio SEX, sounded great for a week while breaking it in then speaker fell apart lol. Now I got a Sundown SA12 and this thing slaps. Very nice for a prefab, can't beat the price. But shipping could have been better. Speaker wire terminals could be better also, but whatever it works.

12W3v3-2

this sub is amazing, theres just no other word for it. im feeding it with 300 rms and sounds awesome, the bass is tight, deep, and clean. i also love the way the drums kick you with this sub. i have it on a sealed box that i also bought from sonic, sonic u are gr8!

Great box

I put my Pioneer TS-W309S4 sub in here and it sounds fantastic. Just as good and clear as my friend's 15. This box was relativly inexpensive and is quite sturdy. It looks great as well. The only con would be there is i tiny chunck of carpet missing on the port, it seems like they made it quickly. Either way, this is great box, you should buy it.

Good vaulue

I have type r in it . Works for me

Good tasty box

Great box. Have it with a 500 rms watt Alpine type r sub and an alpine mrp 500 amp. Sounds great in my jeep patriot suv. I bought some bananas clips in order to remove it with ease when i needed cargo space and mounted my amp in the spare tire compartment. I would recommened this sweet box to anybody.

cost the same as 3/4

This box was way more than I expected for twice the price. Shipped very fast and the carpet looks nice. Had a alpine R type in a 1cu ft box sealed that I was very disappointed in. I was gonna stash it in a corner till the end of time but I saw this box and come on 35 bucks. Pdx 1.600..........R type.........this box.........= loud clear and hits all those bass notes that you know should be there. We all have our two favorite CD's that we turn to every time you turn on a new system. Anyway my cousin is now gonna get two of them and why he wants it that ear splitting loud is way beyond me. Or is it?

Absolutely Great!

These are good quality boxes with tons of space for larger subs! Have 2 of these and each one has a RE Audio SEx V2 in it. Although I had to sand the edges of the boxes to fit those monsters in they hold up to the test and make them both sound really good! Love the black carpeting and its probably weird but these things smell great! Definitely recommend these boxes

By Taylor T on April 21, 2015 Verified purchase

Excellentt

Product is real good and have used for more than 6 months still working really good.

GREAT VALUE

I WOULD RECOMMEND THIS PRODUCT NICE BOX WELL MADE FIVE STARS

you get what u pay for

Do not try to put a sub that can handle a ton of watts in this box. I have an re. xxx12 and blew the joints out of this thing...other than that I'm sure it is good for subs putting out less than 1000 watts...

Gets It Done

I like this box. It's simple, plain, sharp and clean. It was just what I needed. I have a Type R in mine, and it's wonderful. Does its job well.

Great box!

This box looks and sounds amazing! Its so loud and definatly worth it at this price!

By Andrew on June 12, 2015 Verified purchase

Worth the price for sure

Good quality item and definitely worth the price. Definitely recommend

Great price

I would recommend this product because it gives great protection from the elements and makes a nice enclosure for the speaker.

Great product

This 12" subwoofer box was well built and shipping of product was fast.

By David on November 28, 2017 Verified purchase

belva 8ga BBSW127

I liked the quality very much and the cable was very flexible which made it easy to run.

Good quality cable

This cable which I got for free with the purchase of a Belva Sub-woofer box is pretty good. Nice 12 ga. cable with a very nice outer insulator. Nice and flexible.

Great product

The product comes packed with polyfill sheets which I didn’t expect (though it’s probably in the description). The wood is cut at sharp angles which is expected but the carpeting is very thin which I wasn’t a huge fan of. I also have a B-Box and it had thicker carpeting giving it a much better feel. The terminals are nicer than expected, accepting banana-type connections as well as screwing down on the ends if you don’t have banana connectors.

belva 8ga BBSW127

I liked the quality very much and the cable was very flexible which made it easy to run.

12" MDF slot port box

Great sounding box!! Strong 3/4" mdf construction. Deep bass and the added polyfill is a great touch. Best box for your money

By james on January 17, 2020 Verified purchase

Great Quality

The sound quality out of my JL is exactly what I have come to expect in clarity. If you have a larger vehicle get 2 12" I have one and its loud enough.

It kicks

I bought this trying to update the sound in my 2002 explorer. this was a winner move it kicks deeper and cleaner the sub that cost much more. I am even debating putting another one in the trunk to shake the car next to me at red lights.

Excellent Entry Level Sub

For the price of this subwoofer, you honestly can't beat it. It purely has the smoothest sound of any sub in its price range. Bass is tight and clean, no matter what genre of music you listen to. I can rock out with some double bass, or pound my ears with some heavy hitting bass. At 300 watts RMS, this thing will just not die! I have pushed this sub to my stereo's limits multiple times and it never falters to deliver perfect sound every time.

Great value, good product

Great item and value, l recommend this product and buy again.

By alfonso on March 30, 2017 Verified purchase

big black box

sound awesome with my 12" nvx speaker my truck now shake. the box was build with 3/4 wood very nicely make.

Plug and play

Just what the product description says and it does it. No complaints here!

Exactly what I needed

This is great speaker wire, and at a great price. Very happy

By Gerald on February 20, 2016 Verified purchase

Belva Vented Woofer Enclosure

My NVX VCW 122 fit with ease in this enclosure. The enclosure has a nice black carpet covering it and has polyfill to really bring your woofer to life. Not to mention this enclosure survived a hard wreck due to a drunk driver hitting my tail end. It currently is dinged on the exterior a little but works phenomenally.

By Preston on September 16, 2015 Verified purchase

This Sub Booms

The W3v3-2 hits extremely hard, and is a great purchase. There isn't a better quality/louder sub on the market for cheaper. This is a great sub.

Loud as Hell

I have 4 of these in a sealed box on a Power Acoustik 5500 watt amp. These subs sound amazing nice clean clear bass. I can't cut it up past makes my head hurt there doing all this before there broken. They pound so hard within minutes my trunk didn't open from all da bass. I would recommend without a doubt.

JL Audio12w3v3-2

I bought this sub but have not installed. Very impressed with shipping and company easy to work with. the item is bran new and great shape easy installation.

Well built, excellent value

I was surprised of the quality of these sub boxes when they arrived. For the money, I doubt you could do better and I've purchase other similar boxes at twice the price that don't measure up to these. The acoustical damping material is also a bonus, although it would be nice to have a little more "stuffing" for better damping. But you can always add some fiberglas insulation if needed. I will be using these again. The only other suggestions would be to add another small cutout hole for the additional of a tweeter, which is what I did on 8 of these. I am not using the box as a subwoofer, but a two way full range system and Eminence drivers.

Love this brand

Great sub! Love this brand.
The bass is soo tight and deep. The magnet in the back is heavy and big(which is good)

Great box!

The boxes are very well built and priced very well.

By Anonymous on June 2, 2019 Verified purchase

Very pleased, appears to be very solid!

Overall very pleased, especially at this price point. The box is solid and installing the sub went perfectly as planned. She’s heavy, and big, but boy oh boy does she boom!!

Single 12" Vented MDF Subwoofer Enclosure (Belva 1SV12B)

I like this box. great box for the money if your on a budget like I am. it bangs really hard for what it is. it's not really good for the low low freqs but for the mid lows it does its job well! I get compliments everywhere I go. it gives me a lot of trunk space. which is a must have for me

By Anonymous on June 26, 2018 Verified purchase

Great quality

Great quality overall does the job and for the price im extremely happy with it !!!!!!!!!!!!!!!

Great value

Works and sounds great does what it soppose to do

12 Subwoofer Box

I recently bought this product for my Pioneer Champion Series Pro 12 & it goes well with it..
Would recommend it if your going for something small & space saving..

Great Value

Excellent Product at an unbellievable price. Very happy. Delivery was fast.

Great Sub

I thought at first they really werent gonna hit that hard just of cause of much the max wattage is but i was totally wrong till i heard them for the first time that day i went out to my local music shop and bought their solid bass hits clear and crisp

Bang for Buck

This box is simple, nice, and it works. For the time it would have taken me to build a box this was a no brainer. I would recommend it to a friend.

By Briggs on February 18, 2020 Verified purchase

Solid investment. worth the money

This is a great subwoofer box for someone looking to add some decent low in punch to their system. I used it with a kenwood kfc 12 (400 rms) sub and it works really well. The tuning of this box is lower than most in this price range. Polyfil is a added bonus. This is for standard 12 subs. Would not use for anything serious (800+ rms) as the box will easily start to fall apart.
This does not mean its a bad or cheap box. Its just not designed for higher spl type subs.

By TJ on July 14, 2017 Verified purchase

Great box

Good sound can't beat the price for this box
I would buy again and recommend it to others

Amazing!

i would recomend this sub to anyone who wants clear deep bass and top of the line quality. Just installed two of these in my nissan titan and when i turned them on they blew me away! whether you enjoy fast bass lines in a rock song or deep bass of a rap song, these will pick up every beat! Hit HARD for being relatively shallow subs. JL is the way to go! end of story.

wire

Pretty colors. NO issues with this wire but how bout a kit with the nice bullet ends so they can go into the AMPS real perty like and I don't have to hunt and peck for them and/or some colored heat shrink wrap so you know which one is + or - easier.

By Danny on September 30, 2022 Verified purchase

Bang for Buck

I was on the fence about building a box, but after seeing this at the price point and exact dimensions it was a no brainer. This box is perfect and the quality is great. Would recommend to a friend.

Great for my RE 12" Sub

Nice box. Well built and very sturdy. I like the binding posts, too. I had to file the opening just a bit to fit the RE SEX V.2 that I put in it. No biggie. I also pulled back the poly-fill that was covering the vent opening and stapled it to the vent board so air could move more freely.

By EdP on September 8, 2016 Verified purchase

JL AUDIO 12 IN

I would and have recommended this product. Very good quality sound. amazing deal.

WOAW!!!!

good BASS!!!!! very very loud!!!! i got too many tickets with these bad boys!!!! CLEAN SOUND I DO RECOMMEND!!

JL Audio

I purchase this Sub a couple months ago and it has great sound quality !

Insane difference!

I have a P2 Rockford and I have had it in the same box the stereo shop that sold me the sub included in the "great package deal". So the whole time I've had this setup I've wanted to get a new sub cuz it sounded like a "Rampage" brand from the local auto parts store.
A friend of mine recommended I get a more properly sized enclosure. So I ordered this box and when I got it installed and turned it up I couldn't believe my ears. It sounded amazing! Great quality and performance for the price I 100% recommend this product!

By Gregory on March 9, 2020 Verified purchase

Great box

I bought this box for a 250 watt Rockford woofer. When I installed it to the box and tested it, sounds really good. Great size not to heavy.

By Anonymous on September 29, 2019 Verified purchase

Great Value

I bought this for my 12” Alpine. Sounds awesome. Cheapest price and quality is super.

Free Box

The box was free with the purchase of a 12 inch infiniti Kappa sub. I read a review stating that it perfectly, that is not true. I had to widen the hole so the sub could fit flush. Why include a box when its now made for it?

Anyways it seems to be durable and do not take up much space which was a plus for me being a family man. It do look cheap though. I can't speak on sound because the kappa is weak compared to my 15 P3 so I'm not sure if it's the box or the sub. I think it's a good box for an overall cheap set yup. I plan to go sealed

Major air leaks

I got this free with a sub (IDQ12)
The box seems sturdy and well constructed but the air leaks were so loud that I couldn't fully enjoy my new subs. Not sure if I can do anything to remedy it on my end as I don't wanna go thru the hassle of doing a return. I'm sure it's a great box. I just happened to get a defective one.

By Ricardo on August 28, 2017 Verified purchase

Cannot be beat for the price.

Heavy construction with heavy duty speaker terminals. Very pleasing to the eye with good quality carpet.

LOVE IT!!!

Love this sub! I have 1 of these in a sealed box with a JL XD600/1 Mono amp running this at 2 ohm. Hits super hard and very clean. The low frequency bass is amazing.

Great sub

This sub is amazing! So deep and quick to respond. I didn't buy them from Sonic but I wish I would have. Love this website and love the subs.

Excellent subs for the price!

I recently purchased two of these to replace some cheap no-name subs I was using temporarily. They are mounted in a sealed enclosure with 1.4ft^3 for each sub and I've got them wired up at 1ohm, pushing 450w rms to each. These things pound!!! Not only do they put out tons of bass, but the sound quality is fantastic as well. I highly recommend these subs and you cannot beat the price!

Single 12" Vented MDF Subwoofer Enclosure (Belva 1SV12B)

Box is correct size carpet was scared when I got sound is good overall price is ok

Amazing quality

This box is incredibly solid, my 12inch Alpine mounted no problem. The port on this box is nice and had a really good tone, excellent sound, sounds like a 15inch slamming I'm my trunk. Will fit in a 1994 Ford Mustang with no modifications if anyone needs to know.

Nice Box!

Well built and stands up to my digital design's 712 hits highs hard and picks up some lows overall great frequency output! Definitely worth the money and looks good with my car interior I'd highly suggest.

Nice box

Strong nice box. Put a Cerwin Vega hed 12 in it and it sounds amazing.

best sounding woofer i have ever had.....

Highly recommend this driver. I have read about how people think it can't handle power, it has a poor cooling system, blah blah blah. Listen, power it up right and this speaker sounds great, and it will last you a long time.

Hits low notes like a 15. Couldn't believe it when I first heard it. The sound quality is outstanding, and for a 500 RMS driver, it gets impressively loud. Can't image having a w6 or w7. I will never purchase anything other than a JL product ever again.

Using an RE audio amp at 560 RMS in a sealed Sonic box with 1.48 cubic feet, I asked several reputable installers and technicians, and every one of them said this speaker is such high quality that it can take about 100 watts over RMS continuously.

Clear sub

I power this sub with D1200 Orion amp and let me tell you this Sub is so clear. JL rules!!. I will get a second one... this has SQ and bit SPL. Enclosure? , JL specifications sealed enclosure. Clean, Clean clean... Amazing

Hole too small for p3

I just received my sub box and the hole is 1/8 of an inch too small. I have a Rockford fosgate P3D4-12.

Solid!

Nice solid enclosure my infinity kappa hits very nice in this

Great value

Box is sturdy and nicely build. However the speaker wire attachment wasn't to good.

Great box for being a prefab!

If you are just getting into car audio and want something ported and have an entry level P2 or something along those lines, this subwoofer box is amazing for the 12" subs!! I upgrade my sub a week ago... Unfortunately it's choking my new sub like a mofo!! But it's also a custom built psi platform 2 with hd upgrade ????. Overall I'd recommend this to anyone who wants to start off car audio with ported boxes

Weak terminals

Terminals are weak. At 1 ohm 800 rms they melted. Other then that sub sounds good. Nice strong soild box

suprised

I wAs surprised when it came in the mail how heavy and greatly built and sturdy it was out my Memphis in it and was blown away 50 bucks sounds like a lie but your won't be disappointed

good sound, terrible quality & reliability

After receiving a pair of w3's from a friend, i listened to them, they failed, and I then ripped them apart and here's what i gathered. JL fans, don't read this.

PROS: the sub's SQ is superb when its working. cone seems to work well, as well as the surrounds. cage is non-resonant. spider seems average and works decently. terminals are great and hold wire really well and look professional. lead wire is average size for most mainstream subs. also, the whole woofer just looks pretty.

CONS: serious lack of venting; easily melts coil/ separates it from its former. the only venting is through little spaces between the motor and basket that are about the size of a quarter slot for a gumball machine. its former is made of some nonsense layer of vinyl (thinner than computer paper), so the coil easily separates from it and forms a rats nest under harsh conditions. the coil is around an inch in diameter (seriously? its a 500 watt sub..); this also means there are pretty much no recones available for the ridiculous coil size except through JL, and if you haven't already noticed, all of their products cost serious $$, so i'm sure recones are no different.

OVERALL: its a "decent" sub, but definitely not what you should expect from a 500 watt sub at this price. its crappy design and materials are somehow overlooked by people simply because it says "JL" on the front. for this price range (speaking from personal experience, not word of mouth), i recommend you get an RE se-x or an AQ sd2.5. both outperform the w3 in pretty much every way, and both have many recones available.

WOULD I RECOMMEND THIS? if you want a clean looking sub that performs well and you have a small, good quality amp (like most reviewers said, they loved the sound on 300 watts), then yes. the w3 was made for older people (non-teenagers LOL) who want straight up sound quality and don't push their subs very hard. JL's subs sound amazing when a modest amount of clean power is put to them. however, i cannot stress enough that these subs CANNOT take abuse. if you have an amp that truly pushes 500 watts or more and you plan on listening to this sub heavily, dig an early grave for the JL w3 because it will die in a short period of time.

Decent box

More than a decent box for it's pricepoint.For subs in range of 150 to 500 watts, it's good.I can't build an enclosure this cheap.Like most prefab boxes,it lacks bracing(which I add myself from mdf scrap leftovers of previous builds)which shouldn't be needed if not pushing serious wattage.Great box for budget or beginning enthusiasts!

By Anonymous on November 12, 2019 Verified purchase

It bangs

What a great banging box I dropped a vcw122 and am pushing about 900 rms and it hurts to sit inside the car with some songs.

Wow! Made to last

By the description I figured this would be a decent box but when I actually got it I was blown away! This box is the best made box I have seen! I’m very very happy and will never buy another brand! I also have to say the shipping was unbelievably fast! I’m a happy customer, from the quality of the enclosure and low price to the extremely fast shipping, I have nothing but positive things to say about soniceletronix! Happy happy happy!!

ported enclosure

Well made and padded inside. Looks good and sounds good too.

JustBuyIt!!!

I have a 12JlAudio W3. Recently went from 2-12w6 to the 1-12W3. This Box was worth every dollar! This W3 sounds amazing in this box! Plus I save 25% of my trunk space not have 2-12s. This box definitely exceeded my expectations for my W3. Great quality at a Great Price! Don’t hesitate on this box just buy it!

Great box!!!

Great quality, sounds great, would definitely recommend and would buy again

Great value

Very high quality box especially for the price. Thicker than most boxes on the market too which is a plus.

Amzing

The sound quality this box delivers is amaziing!! I love it! I ise it with a Jl 12 in sub,,, the results are incredibly amazing!! Jl delivers the best quality of sound.

smooth yet potent.

I've always heard about how excellent JL is, but I had never had the chance to listen until about 6 months ago. This pair of 12's is without a doubt the best money can buy before you go spending thousands of dollars for multi thousand Watt w7's. The tone range is clean and constant. They hit harder than Mike Tyson. They are more than enough for general use. But there is no need for me to review, if you are considering these subs, you already know what you're in for. Have fun. Enjoy responsibly.

Does the job

Not like a manufacturer made box or a custom box, but it does the trick cheap and efficiently. Sounds good, looks good, so I'm good with it!

By Russ on June 23, 2020 Verified purchase

Good box

Good box. Hits pretty well. My terminal broke out of the box but I believe it was my fault.

Great sub box for my alpine type r

Great quality box Works perfect with my alpine type R great sound and great quality

It awesome!

The sound so smooth and great bass with those box! I would keep buy it! Grade A for that box and it come in as great shape! No damage or anything

JL 12w3

I had an 1800W amp and this sub hooked up it was gettin 900W and it hit soooo hard... only problem is was that after 3 weeks or so the bump wore down and it didnt hit near as hard since... It worked great before this happened. Sonicelectronix has the best price on audio I looked everywhere and I had the best service here at their site

Simple

Gets the job done. Decently priced. I would buy again.

By Michael on July 6, 2022 Verified purchase

Great Value

Sounds great! Using with RE SCX V2 12" sub. Loud, deep bass! Very well built. Had to increase the size of the mounting hole, but I knew that going in.

By Jeff on January 11, 2020 Verified purchase

Very well built box!

This box looks very nice and it's not too heavy at all. It's the perfect size for any small sedan vehicle. It's also very well built. I really like the cotton material on the inside because that helps make the sound even better.

Perfect ported box

I have a Massive Audio ECO in this box and it hits low and deep ( that's what she said) Highly recommend this box or any box made by Belva.

By Anonymous on September 20, 2018 Verified purchase

Decent box

Good we'll built box. Fits decently in my F150 extended cab. Never had need far back. So box, subs, amps, ect, fills the empty space perfectly

By John on August 24, 2017 Verified purchase

Quality

I'm using just one of these for my pickup and it's perfect. Not overpowering, just the right balance... though if i want i can get a lot of bass out of it.

Bang for the buck

This box meets all my requirements. It's solid and heave with nice carpeting, the box is made with very high-quality material. I listen to a lot of hip hop and r&b and this box help my sub deliver a nice rich deep bass I have 1100 watts RMS with it, and it can be heard a block away.

By Mauricio on April 9, 2020 Verified purchase

Nice box

Got this box for free with my Image Dynamics IDQ12. Box is sturdy and looks nice. No complaints even if I had to pay for it. Would buy.

stick with kicker

Bought 1 sub with alpine 500 mono amp. Blown it in 5 days. Weak speaker. JL's are known to hit hard but are very weak. Blast your sub for 5 or 10 min ur sub will get hot and smelling burnt. They are the most blown subs even the W7's blown easily, too. Stick with Kicker. Last longer and doesn't blow that easily.

great products for low prices

sonic electronix items are genuine at a very fair price....they also ship crazy fast...

Best in class!

I highly recommend this sub. Clear and POWERFUL! Capable of tight bass for rock and country but also will bump with the best to rap and hip hop. It doesn’t need as much power as similar subwoofers to produce the same volume and bright clarity.

By Cade on May 17, 2020 Verified purchase

Skull pounding bass!

I installed this sub in a 1.3 cf sealed box. Mounted securely on four sides in the trunk of a 2000 VW Jetta. It is more than enough bass and hit for all needs. I had to turn down the bass control on amp and radio. I would recommend to anyone. Great value. Thanks Sonic Electronix.

By alan on May 2, 2017 Verified purchase

Perfect sub for my application

Have a JX 500/1D pushing this thing...Just to be upfront, I have gone through two of these over the last 4 years. The first one was great, but I pushed it a little too hard (albeit it was probably my fault, playing bass tracks to see how low it could go!). The second one I have had for two years and it is still going strong. It hits hard in such a small box (1.125 cu ft) and produces nice, clean, powerful bass. Couldn't be happier. Best sub I have owned thus far.

By Nate on February 11, 2016 Verified purchase

Love this speak I have 1 single 15 powered by a 2500 watt earthquake class d and it absolutely bangs can't go wrong with this subwoofer it has clean sound and can take power well

By Donald on April 2, 2024 Verified purchase

Can’t Beat JL Audio

As expected, it sounds great!!! Such clean and loud bass!!! Gave the Value 4 stars only because I still think they could be more affordable with the competition… But I get it, they’re at the top for a reason.

By Pooji on March 22, 2023 Verified purchase

Sweet sound

I bought 2 of these recently hooked up to a HiFi Zeus 1200.1 amp. At first I was skeptical because I didn't make adjustments until I had it on at low volume. As I tinkered with it more (raise this, lower that) I finally had it set to match my head unit. I was a die-hard kicker and fosgate fan....not anymore. These 2 subs blew those boys out of the water. Much cleaner sound, much deeper bass (even at low volume), after I broke them in they sound even better. Since FI and AA is way out of my budget, these are solid until I can afford my unicorn. I highly recommend these to Bass heads on a budget. A decent amp and these..... beautiful. It's been. 5 months now and zero complaints from me !!!

Awesome sub

I am powering it with a Jl rd900/5. At two ohms it’s getting 500rms and I think it pounds. For just one sub if produces a ton of clean bass. I have it in the sealed enclosure recommended on the data sheet.

Great value

I recommend this speakers they are great I bought 1and installed it on my o5 gmc yukon I'm thinking of buying one more 12w3v it's a great speaker

amazing and cheap

i replaced the original speaker wire in my car with this and the difference is just crazy and this wire is really cheap so it’s definitely worth it. it’s a nice color and is very easy to work with.

By tart on June 1, 2024 Verified purchase

Solid Value!

12 Ga speaker wire, with great insulation, for this price? I was skeptical at first but after hooking everything up I can say that this wire is fantastic, and much better value than Walmart/Amazon. 23ft for $7 of high quality wire? No brainer.

By Timothy on October 29, 2024 Verified purchase

Basic Speaker Wire

I like the pliable insulation on these wires. It also strips very clean.

By Eric on May 15, 2024 Verified purchase

Best subwoofer you can get for both the price and only 500w rms

This sub hits absolutely accurate and as hard as you want it to. I have it hooked to my rd500/1 amp and it's PERFECT for it. No clipping. No distortion, and the sound is just so on point. I love this sub. It's actually the 3rd one I've owned, and I keep coming back to it! That has to tell you something.

By Robert l on December 20, 2024 Verified purchase

Great wire for speakers

I should’ve ordered more wire it’s the perfect gauge for what I’m using it for subs and my coaxials

By Clarence on July 2, 2025 Verified purchase

Wire

Free wire, can't beat that!

By Dave on June 5, 2025 Verified purchase

Solid speaker wire for the price

This is great speaker wire for the price. Has a nice protective jacket and very flexible. I usually stick to OFC wires but for lower wattage speakers and line output converters this is perfect!

By Chris on March 4, 2025 Verified purchase

Great Box for the price

The craftsmanship is very nice considering the price. the box is very well built and sturdy. The kicker CWR124 sounds great paired with this box.

By Brandon on June 18, 2024 Verified purchase

W3

It sounds much better than the WO handles more watts good sub

By Brok on April 11, 2026 Verified purchase

Perfect Fit

Perfect Fit, dimensions were spot on, was able to color match my interior. Side note exact cubic ft needed for old school Cerwin Vega!!!!!

By #highmaintenance on January 12, 2026 Verified purchase

Great value prefab enclosure!!

A while back I purchased the skar audio single 12" SDR bundle with the 800w RMS amp and loaded SDR 12 vented enclosure and it sounded great. The problem was the skar enclosure was too big for my older car. So I put the sub in a small sealed box and it sounded like garbage. Fast forward a few years and I purchased a new car that could fit a larger enclosure. So I purchased this Belva vented enclosure and I'm so happy I did. I immediately got my bass back. It's crazy how much a box with the right volume and port measurements along with being tuned to the right frequency helps. Sounds as good if not better than the Skar audio prefab box. And the best part is this box has just the right specs for the Rockford Fosgate P3D2-12, so when I decide to upgrade to a better subwoofer, I won't have to find or build a new enclosure. Overall, it does the job and does it well. Just check the user manual of your sub and make sure this enclosures specs are exactly or close to what the subwoofer manufacturer says will make your sub sound best.

By Paul on April 26, 2025 Verified purchase

Great Box!

I had ordered a different box and when it arrived I knew it would not fit. I returned it and got this one. This thing rocks with the Kicker CompVR 12. I have it wired to 1 ohm with the HiFonics 1950 amp I also bought from here. If you own a 5th gen Camaro this box is pretty much the largest you can go. Fit by 1/8 inch.

By Aaron on January 29, 2025 Verified purchase

Amazing subwoofer

I wouldn’t buy anything else ! JL has been and is still one of the top brands I go to, expensive , but you get what you pay for! And this 12w3v3-2 definitely shines!! Lows are deep! At moderate power. I am pushing slash 500/1v1 amp on it and that’s all it needs

By Jacek on January 7, 2025 Verified purchase

Enclosure feels of quality, Would buy again

Used this on a 2021 camry install and it fit perfect!

By Cameron on January 6, 2025 Verified purchase