I've been a car system fan for many years and had alot of setups. These Hifonics Subs are more than you can ever expect from a low priced subwoofer like this one. If you are looking for a setup of two or more speakers these are the best. Great looking, powerful, CHEAP(money wise) and built to last. I have 3 of them and let me tell you they hit so hard my ears ring. Oh yea one more thing Sonic Electronix - a super glue should come with these subs cuz my rear view mirror fell right off. :)) That should tell you (buyers) that these product is worth of money. Thanks for reading this hope I helped.

Sounds looks and is a great sub. Best for the money.

This sub just keeps hitting harder and lower! I'm amazed and blown away! I was underwhelmed for a while there because I realized that I actually killed my previous sub by sending a very strong and very clipped signal to it by having the gain set too high for my head unit's preamp voltage. To reach the ~250W RMS the amp is rated for with my head unit, I need the gain knob LESS than half way up. Any more than that and it starts distorting, and this is not because of the sub but because I'M SENDING A CLIPPED SIGNAL FROM MY AMP. I feel like I've officially made that step from n00b to experienced installer. I had read all the instructions and guides before and never understood what they meant by matching the head unit's preamp voltage. Now I do and I know how not to kill a sub (and/or amp, for that matter).

Anyway, I had never broken in a sub and this sub is STILL blowing me away! It's hitting harder and it does better throughout the entire range. The lower notes (centered in the mid to high 30Hz range) I could barely feel at the start are now making the car have a slow, deep vibration when they hit (remember it's a sealed box). Being a 400W sub I feel like playing it full-blast at 250W RMS is good enough as 'breaking it in' and it is just finally beginning to impress me. It's hitting almost as hard as the Memphis sub that was getting a clipped signal with a few extra watts to compensate for my bass-trap trunk (thick leather seats, kills any bass trying to come from right behind you). Right now I'm keeping my rear seat's backrest down so I can feel the full effect of the sub.

I just can't wait to give it 400W. OMG. What a great sub. If 'you get what you pay for' is true 99% of the time, the HFX12D4 is the 1%, by far!

The hifonics hfx12D4 is the best subwoofer on the market if your on a budget, yes the price may scare you, you say well with the sub that cheap how could it possibly be true that it sounds to good, well take it from me, i was very unsure of the purchase i made with this sub, i strictly went off of reviews, however, this subwoofer i my home theater sub, it hits. i owned 2 alpine type R 12s, so believe me i know what it means when a subwoofer hits. but the cold hard truth is, this sub is amazing the quality is so precise you cant help but to be cautious. BUY THIS SUBWOOFER YOU WILL NOT REGRET IT!!!

Wow is all i could say. Got them from a local dealer in my town, pulled them out of the box, and started beating the crap outta them. Got them to add to 2 Kicker CVR 12's, and was a little skeptical at first. But as they started getting broken in, the more surprised I became with them. Seem to be handling the power quite well. Entire setup is powered by an MTX RFL 600rms, all getting the same power. Amazed at how well a $40 sub handles the power. I don't know what the RFL 600 is actually capable of, but it's pushing the CVR's and the HFX's to their limits. BUT, the only complaint I have about this sub is the dust cap, seems a little flimsy. But other than that, a rock solid sub ready for whatever you can throw at it. Will be buying again for my 8 12's setup that I plan on doing in my F-150.

I have 2 of these hifonics wired together to a 4ohm load briged to a hifonic zeus 500.2 and it hits hard. it also sounds very good. this is the very best for the price, especially if you are getting more than one.

i have four of these in a 01 cadillac dhs and my s### bangs just crazy rattels every in my car and anything near it i putt these with a brutus elite 2500 dealers only model im pushing it at 1700 watts at 2ohm wich is 425 watts per sub man some people cant even sit in my car . it is crazzy there great and for the price so what if you blow one buy another one and keep on bangin

Well to start off I bought these subbs kinda on a whim because of there price and was more than pleased with what I have got. I would recomend these to anybody looking for a system that could beat kicker and stand with jl I have only found one problem with them and its my girlfriend has a hard time breathing so she doesn't like them as much as I do but they have handled everything I've thrown at them not to mention that there rated at 400 watts rms and I broke them in rather well by running them at about half for a month (hard I know but well worth it) now I'm running 500 watts rms through them on a daily basis

I looked at these subs for awhile now my cousin got one i hooked it to my 800 watt rms legacy amp no gain in a sealed 1.25 cube foot box and it hit just as hard and my 2 duals do in a bandpass i was amazed on how great it sounded. So i bought my self 2 today will be switching out the duals for these. Get these if you are tight on money they will hit harder then kickers if you know what you are doing.

I was impressed by what this sub can do its definatly worth the little price tag!! Also it being a dual 4 ohm voice coil sub is very nice!

i got these for 35 a piece and they rock...i have 2 of them in my wifes car wired at 1ohm on a boss 2500 mono amp..and these hit so hard..if you are wondering about getting them based on the price if they are cheap...DONT..get them you will not be disappointed they are worth double the price..

A real review.. This sub is amazing! it is built good and looks pretty cool. I have it powered by the kicker dx250.1. I am giving it about 280 rms and it sounds awesome! Hits the lows and mids like a monster but doesnt really hit the highs. Well worth over 100 bt only paid 38! If youre on a budget this is the way to go, you cant go wrong. I recommend it 100%

Great deal!... bumping just as hard as some 130$ subs. Embarassing to see these overpriced brands like kicker and pioneer get thought of as the best when these "not so famous" brands throw out better deals with better quality. I have just one of these in a sealed box and it even moves my rear view mirror a bit. For the price you cant go wrong by ordering this.

I have 2 of these in a sealed box, wired parallel/parallel to the HFi1500D at 1ohm, tuned to 780watts. These things slam for the price they are at. I was surprised! I now plan on using until I can get a chance to upgrade more.

These subs it hard.I was surprise how hard these subs hit. Buy these subs put in a ported or sealed box , hook them up and watch how hard they hit. You can't beat the price. Get this sub.

Just got two of these this week. I was looking for good cheap subs, and Hifonics always seems to be there. They hit hard with the autotek atx1600.2, but i think once i break them in im going for something bigger. Owned some older hifonics subs a while back and they lasted forever until i sold them. Not the best subs in the world of course, but if you are on a budget go ahead don't be scared, they are definitely worth the money and sound much more expensive.

these two in a sealed box in a miata with 375 watts rms total input made the thing sound like the car was rattling to pieces. bought another box and put just one in there and even that is a bit much! very clear great value!!!!

I have 2 of the older HFi12D4 in one box and two of the HFX12D4 in another, both in parallel so they took same exact power and the Hfi burned up after 6 months While these remained unaffected.

They sound great and even though the older model (HFi12D4) looked prettier with the the chrome on the edge, and the nice pressure terminals,
This one IS better because this HFX12D4 actually outperforms them very slightly AND take more power so they wont blow on you at higher watts!

These woofers are a good alternative to the expensive competition woofers because they have a good SOUND and they are LIGHTER so the weight wont drag your car down, especially if you have a sporty car you want to keep weight at a minimal.

They re not of course as loud as expensive comps,
but they still hit hard for lower power setups and they sound deep.

I would say they are as loud as woofers 2-3X their price,
but the key to most low cost woofers like these,
is to not overpower them .
So listen for their "hit" and back off your gain slightly from their,
for longer listening sessions .

I have 2 of the older HFi12D4 in one box and two of the HFX12D4 in another, both in parallel, so they took same exact power and the Hfi burned up at around 250W RMS (1000 divide by 4) while these remained unaffected.

They sound great, and even though the HFi12D4 looked prettier with the chrome on the edge, and the nice pressure terminals. This one is better because this HFX12D4 actually outperforms them very slightly AND take more power so they won't blow on you at higher watts!

The HFX12D4 are supposed to replace those HFi12D4 anyway.

These woofers are a good alternative to the expensive competition woofers because they SOUND good and they are LIGHTER so the weight won't drag your car down, especially if you have a sporty car you want to keep weight at a minimal.

They're not as loud as the loudest, but they are great for lower power setups as they sound deep.

I would say they are as loud as any woofers around $100 and below price range, and have a nice bassy hit to them.

this is the best sub that u have ever owned. i just recently had rockfords and these pound wayy harder and they way cheaper. pros- decent size voice coil for a sub and gets all the lows. cons- would be nice if it had push terminals

i have these subs and they beat hard i have a 1000 watt autotek amp 2 channel. My co-worker like them.so buy these speakers, if you want good slap at a cheap price. thanks sonic eletronix .

I bought these because I wanted to try a new brand. Never owned Hifonics before. I bought two of these and a Hifonics 1000d amp to put in my 98 GMC Sierra ext cab. I haul my kids around sometimes and had to buy a dual 12" Pro downfire box. I also bought 1" spacers to get a little less depth, and stuffed it with polyfill for more airspace. I still think the box is to small for these subs. The set up sounds pretty good, but obviously not as loud as the 3 MA Audio 12"s in a triple box I had to sell. That thing was a beast. Anyway, not bad for the money. I will say, try and get better terminals for the subs, the stock ones are crap.

I bought 1 12" HFX12D4 and a 400w amp for the back of my 78 bronco for some cheap bass and I must say that I am very impressed with this woofer! My sub hits every bit as hard as most guys lower end systems with 2 subs! This won't blow the glass out of your vehicle but for the price, you absolutely cannot beat it!

I buy 6 of them and i put with planet audio mono 1ch 4000w on my town car 95 and i blow my trunk. I really recommended to anyone.

I recommend this product for its power and reliability.
Very good report quality price.

I orderd mine from eBay. All i have to say is wow. These things pound. I have them in a prefab box with a 820 watt spl amp in my 1993 blazer and these things really beat. I have all my bass and subwoofer gain on the deck turned down and they still hammer. Haven't even broke them in yet! A must buy for any budget system!!! Or anyone who wants beastin cheap bass!!! Good buy!!!

I have two of these running off of a 1100watt amp and they sound great! After a while of bumping in your car the subwoofers will give you a headache!

I have two of these subs in my car and i am running an 1100 2ch amp into them and they are so loud i have a headache after like 1 min of bumbing. They also unleveled my trunk too.

These subs do pretty good. Gives a nice sound.

These subs BEAT! I mean wow, its amazing how cheap these subs are in price compared to the sound they are able to produce. I purchased these subs awhile back as I was waiting to build a box. BUILDING THE BOX is the KEY to making your subwoofer perform at its best. Get the right box and a good amp and these subs will not disappoint.

I purchased this sub not knowing much about it, but I have it hooked up to my Hifonics 1000d at 2 ohms in a ported box and it KNOCKS!, the bass is so crisp and clear, I really was blown away. Most people think I have a much larger sub. Great job Hifonics! If you are on a tight budget, do not hesitate to buy this sub.

For entry level subs they are very surprising, good bass response. Have them on a 400.1 amp so I'm powering them by the recommended rms power and they sound great.

I just replaced a Memphis Power Reference subwoofer with this one. If you don't know about Memphis, look them up, they make quality hard-hitting subs. Well this Hifonics HFX12D4 sounds just as good and may actually even hit harder. It's only getting maybe 200W RMS if that from my 250W RMS amp that's turned up just a notch over half way. It hits very hard, it's not broken in, and it's missing out on 50w+ RMS that I will be giving it after break-in period is over. I can't wait to hear how hard it sounds when I can give it real power. I have it in a generic 1.25 Cu Ft sealed box, it's being powered by a Directed 250d amplifier, and I have it set to hit up to around 125Hz and it handles the high notes just fine. A more than formidable replacement for the old Memphis PR sub that I was running. Hifonics was the right choice.

I bought 2 of these to go in a ported box. They are currently under powered by about 150 watts or so, but they still hit pretty hard in the back of an 07 Aveo5. Would definitely recommend these to anyone looking for some pretty good bang for the money.
Only one small complaint though, One of the dust caps on the sub started to come off shortly after the break in. Fixed it with some thin compound hobby glue. Other than that I love em'. Also would have been nice to have some different terminals than the ones on there but no big.

This sub sounds really good for the price. It hits pretty good.

i own 2 of them for 2 years huckd up to 2000 watt amp briged 800 watts going to them and they pound worth the money recomend them

I have these in a 1.75 cubic feet per chamber ported and let me just say wow. These are cheap and give lots of spl. I have two Rockford Fosgates and these hit harder for less then 1/3 of the price! Overall these are wonderful subwoofers.