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JBL GTO638

120W 6.5" / 6.75" 3-Way Grand Touring GTO Series Speakers w/ Mylar-Titanium Tweeters

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List price $149.95

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$66.95

with warranty A Pair

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JBL GTO638

120W 6.5" / 6.75" 3-Way Grand Touring GTO Series Speakers w/ Mylar-Titanium Tweeters

$66.95

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25% off on Sound Dampening!

For a limited time, save 25% off the NVX SDVK4 Versa Kit with a qualifying pair of speakers! Sound dampening will eliminate rattles, insulate against heat, and also improve the sound and output of your speakers!

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JBL GTO638

$66.95

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NVX SDVK4

$19.99

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NVX SDVK4

• Eliminates Road Noise
• Quiets Vibrations
• Stops Rattles
• Increases SPL
• Reduces Heat
• Simple To Install
• Easy To Form Aluminum
• Four Step Peel and Stick Installation
• One 18" x 32" Piece

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$81.94

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JBL Store

Professional JBL Sound:

With the long history of professional audio equipment manufactured my JBL, it is no surprise that the Grand Touring Series (GTO) produce some of the finest sound available for car speakers. By integrating the majority of JBL's top car speaker technology, these speakers are able to effectively deliver truly stunning audio, while keeping the price affordable for everyone. For those that are looking for a quality car speaker that will not only sound great, but also keep more money in your pockets. Put your trust in JBL and these Grand Touring Series speakers.

Tweeter-Level Adjustment with Unipoint:

The tweeters on the GTO series speakers are an excellent example of JBL's advanced technology. Made from My/Ti (Mylar and Titanium composite), the tweeters offer a higher power handling, greater efficiency, and reduced distortion. To direct that sound where you want, JBL has designed a Unipoint rotating tweeter pod that allows the tweeter to be directed towards the listener. This results is better imaging and a more accurate sound stage. To top of the tweeter technology, JBL engineered a tweeter-level control switch that adjusts the tweeter dB output. This allows for more sound adjustments after the speaker is installed.



The Sound of quality

Sonic Electronix, one of the leaders in car audio, recently visited Harman, the premium global audio and infotainment group, at their research and development locations in Northridge, California and Detroit, Michigan. The purpose of these visits was to utilize and combine the powerful brand of Harman and the industry leading knowledge behind Sonic Electronix to begin working together on developing future car audio projects.


JBL GTO939

General Features:

  • 6-1/2"/6-3/4" Grand Touring Series 3-Way Car Speaker System
  • Power Handling:
    • Peak: 360 watts per set / 180 watts each side
    • RMS: 120 watts per set / 60 watts each side
  • Patent pending Plus One woofer cones
  • Mylar/titanium composite dome tweeters
  • Can be safely powered by any headunit
  • Sensitivity: 92 dB
  • 2 ohms impedance
  • Frequency response: 50-21,000 Hz
  • Top-mount depth: 2"
  • Cutout diameter: 5-1/8"
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Priced Per Pair

Product History:

JBL GTO638 thumbnail
(newest, current model)
JBL GTO637 thumbnail
(previous model, replaced by JBL GTO638)

Speaker Specifications

Series
This is the manufacturer product line of speakers.
GTO (JBL)
Priced Per
Car Speakers are typically sold in pairs so you will receive 2 speakers for each speaker purchase on speakers marked "Priced Per Pair". If a speaker is marked "Priced Per Each" then the speaker is sold individually and each purchase you make will result in 1 speaker. High-powered tweeters, midrange and full-range pro audio for car speakers are typically sold per each speaker.
Pair
Speaker Size
Refers to the size of the speaker measured in inches. Every vehicle has standard application sizes. Please use our vehicle fitment guide for your vehicle's specific speaker sizes if you do not know them.
6-1/2" (also mounts in 6-3/4" w/ included brackets)
Design
The number of individual drivers in a car speaker. Speakers with 2 drivers are known as a 2-way, and 3 drivers are known as a 3-way. Component systems are often referred to as "separates" because the tweeter is not attached to the midwoofer (main speaker driver) and mounts separately in a location such as a door post. Component systems typically come with an external crossover so you can easily adjust the high and low frequencies sent to both the midwoofer and the tweeter. Center channel speakers are great for those looking to have surround sound in their vehicle.
3-way
Tweeter Design
Designs such as cone, dome, semi-dome, balanced dome, and whizzer are most popular. Cone tweeters are simple, efficient and typically are the most reasonably priced. Dome tweeters are used in most home speakers, and provide a smoother and more accurate sound. Semi-dome design is one with a dome placed inside a cone. A Balanced dome driver is a semi-dome with equal reproduction area given the cone and dome portions of the driver. A whizzer tweeter is a separate tweeter cone driven by the voice coil of the woofer.
Dome
Tweeter Composition
Materials such as polypropylene, silk, cloth, and paper are the most common, where as many more recent tweeters are now manufactured with composites such as Aluminum, Titanium, Mylar, and other materials.

PEI is an acronym for "Polyetherimide" which is an amorphous, amber transparent, high-performance thermoplastic.

Mylar/Titanium Hybrid
Woofer Composition
Lightweight woofer cone materials are essential for efficient operation. Poly cones produce exceptional sound and are sturdy against various changes in temperature. Paper cones are very efficient, and when treated for moisture resistance, will perform at a high level. Poly refers to polypropylene, which is thermoplastic or fibers that are polymers of propylene. IMPP refers to injection molded polypropylene, a commonly used process and material in speakers.
Plus One
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
180 watts
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
60 watts
Sensitivity
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
 
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
92 dB
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
50 - 21,000 Hz
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
2 ohms
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.

Yes
Top-Mount Depth
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
2"
Cutout Dimensions
Refers to the dimensions of the hole, measured in inches, required to contain the speaker.
5-1/8""
Speaker Grilles
A grating or screen of metal or plastic bars or wires, mounted in front of a speaker as protection. If yes, the speakers will include matching speaker grilles. If no, there are no grilles included.
Yes
Number of Speakers
This is the number of speaker that is included in the package. Each purchase will result in receiving the number of speakers indicated here. Please note that some items will have multiple woofers in the same enclosure. For sets of component speakers, this number will refer to the number of sets of speakers (For example, 2 would indicate the purchase includes 2 woofers and 2 tweeters).

Please refer to the product image and description for further details about the speaker.

2

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
74%
4 Star
18%
3 Star
0%
2 Star
5%
1 Star
3%

Average Attribution Rating

Durability
4.5
Value
4.7
Features
4.7
Design
4.8
Usability
4.8
David

Williamston, SC

Overall
Durability
Value
Features
Design
Usability
awesome

December 8, 2014

These speakers are very clear with great highs. Don't think twice about it buy these if your on a budget

40 of 71 found this helpful

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Jason

Sebastian, FL

Overall
Durability
Value
Features
Design
Usability
Jbl gto638 crystal clear

July 29, 2013

Very easy install. Running them at 50 rms they play extremely loud and I love them. JBL-enough said

34 of 61 found this helpful

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MLS

Woodbridge, VA

Overall
Durability
Value
Features
Design
Usability
JBL GTO638..great value

February 4, 2014

The sound is very clear. The speakers make my radio sound so much better. I would recommend this product

39 of 72 found this helpful

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lx

Atlanta

Overall
Durability
Value
Features
Design
Usability
good 2ohm speaker

July 3, 2014

I needed a 2ohm for my OEM amp.
This is a good 2ohm at a good price

38 of 71 found this helpful

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JBL Speakers

Sarasota Fl

Overall
Durability
Value
Features
Design
Usability
Great Service -Fast Delivery - Well Packaged

May 19, 2014

Pleased with the product and the price is great in comparison to other sites.

33 of 61 found this helpful

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dan

chicago il

Overall
Durability
Value
Features
Design
Usability
awesome

May 6, 2014

Great product very clear and loud will definitely recommend to others

36 of 67 found this helpful

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markymark

palm coast, florida

Overall
Durability
Value
Features
Design
Usability
JBL!

January 3, 2014

these speakers when not amplified sounded really the same as my 40 dollar sony xplodes. i wasnt really impressed... UNTIL i got an amplifier to amp them up. OH MY GOD. these speakers are crystal clear!! really good bass response also! make sure you give these bad boys the juice they deserve! ;) they will treat you good

36 of 68 found this helpful

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spritemast

lithonia, ga

Overall
Durability
Value
Features
Design
Usability
Great tweeters

March 19, 2013

The sound from these are amazing ....I had these with a 10w amp and a 60w rms amp ...it sounds good with 10 but 60 is fantastic ....soloooo clear ...you will not b disappointed!!!

33 of 62 found this helpful

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Levius

Clinton, MS

Overall
Durability
Value
Features
Design
Usability
Good speakers.

May 22, 2015

I would recommend these speakers to anyone who needs to replace there factory 6 1/2's. Great midrange and tweeters.
Bass is pretty good also.

18 of 33 found this helpful

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Craig

Panama City, FL

Overall
Durability
Value
Features
Design
Usability
Great Upgrade

June 22, 2014

I bought 2 pair of these to go in my 2010 Chevy Avalanche to replace the "premium" Bose speakers in the doors. I was told I needed 2ohm speakers if I panned on using the factory head unit because that's what the factory speakers were. So I tried them and they sound amazing. Much better than those Bose speakers. I will eventually put an amp to them in the future but for now the head unit is doing a good job and these speakers really made the music come alive.

37 of 71 found this helpful

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Melvin

Albany, GA

Overall
Durability
Value
Features
Design
Usability
Great replacement for OE speakers

February 1, 2014

I bought the GTO 638 to replace rear door speakers in my 2006 Hyundai Tucson. I'm still using the factory head unit. These are a big improvement over the factory originals. Sound quality is much better. If and when I need a new head unit, I know I can depend on these speakers to handle it. I highly recommend these speakers and their price was reasonable.
Pros: good sound quality
Cons: None

36 of 69 found this helpful

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Roger

Osceola,In

Overall
Durability
Value
Features
Design
Usability
Rockn!

March 5, 2012

I would recommend these speakers for 2 reasons. I bought them without ever hearing them and they are a JBL product pretty much the only speakers I would ever own. If only Yamaha would now make car stereos the world would be a better place lol.

32 of 61 found this helpful

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Don Clark-Bar

Alto,MI.

Overall
Durability
Value
Features
Design
Usability
Best Buy EVER!!

May 20, 2014

These are high end speakers,worth much more! Thank you Sonic Electronix for making them affordable for me I love mine they sound amazing and I also have the tree way 6X9's in the rear deck! It's a win win.

39 of 76 found this helpful

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andy

livingston,nj

Overall
Durability
Value
Features
Design
Usability
very nice speaker, at a great price

August 26, 2013

these speakers are easy to install, with all hardware provided. They sound so much better than the stock speakers in my honda accord. The bass is pretty good for this size speaker but the highs are great!. Love them

26 of 50 found this helpful

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John

Pompano Beach, FL

Overall
Durability
Value
Features
Design
Usability
Love these.

August 22, 2012

Great speakers for the inside of my boat. No problems installing or listening to them.

29 of 56 found this helpful

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Jordan

Mississippi

Overall
Durability
Value
Features
Design
Usability
Decent

March 5, 2012

Old tundra speakers went out put these in to replace stock speakers and they are good. Just hard to screw in the stock housing and needs to be tight seal against the housing but not bad heard worse heard better.

22 of 42 found this helpful

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Michael

Columbus, GA

Overall
Durability
Value
Features
Design
Usability
Fits my Jeep 95 orvis

May 5, 2015

I originally got the jbl gto 529's and they were to small... No where near the stock sound I had so I sent the 529's back for the GTO 638's!!! Some lucky person is getting an open box discount on a set of gto529's. The 638's are more than what I need to replace and exceed the oem premium infinity's.

Do yourself a favor if you are a novice. Make sure to call them to make sure there are adapter mounts and quick connector/adapters for the wiring. It makes the job way easier. I found that out when testing the 529's to see if they were going to be lound enough. Happy shopping

20 of 39 found this helpful

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Joe

New Rochelle, NY

Overall
Durability
Value
Features
Design
Usability
Nice Speaker, Just feed it some power to be happy.

May 29, 2014

I got this speaker to replace the cheap 2ohm rear speakers in my 2014 Nissan Frontier. Install was very easy, but had to cut factory wiring to connect. Make sure you get the polarity right so you do not have to remove the door panel again. Sound it very nice with factory radio, But add a amp like i did and you will be much happier.

38 of 75 found this helpful

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Enrique

Oakley

Overall
Durability
Value
Features
Design
Usability
Jbl

May 14, 2014

I like it I'm happy thank u I will order from u guys again

30 of 59 found this helpful

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Todd

Columbus, GA

Overall
Durability
Value
Features
Design
Usability
Great value!

January 11, 2014

These are exactly what I expected from JBL with a very low price. At $55 the performance far exceeded the price. These were used as factory replacement front door speakers in a 2006 Impala and with the factory stereo, a JBL amp, and 2 6x9 JBL rear speakers. The system is amazing and the buying experience from sonic elec was awesome!! I will purchase from them again!

26 of 51 found this helpful

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Philip

Prineville, OR

Overall
Durability
Value
Features
Design
Usability
Horrible

December 10, 2010

Have already replaced these speakers as they blew shortly after being installed. They were professionally installed and were not hooked up to too much power. I don't believe these speakers are not rated properly as far as the power they can handle.

27 of 53 found this helpful

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Me

Ohio

Overall
Durability
Value
Features
Design
Usability
Great sound

January 28, 2014

Great sounding speakers. Blows away the factory garbage. Factory speakers would distort at just over 3/4 volume. Needed more sound to compete with the pipes. Now I can hear the stereo over the pipes clearly. Don't forget the adapter rings when buying.

35 of 70 found this helpful

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Matt

Watertown, NY

Overall
Durability
Value
Features
Design
Usability
Get ready to rock

January 23, 2014

I have owned these speakers for about a month now. I received them from my wife as a xmas present. Found a youtube video on how to install them in my Chevy Impala. The speakers sound great. Tremendous high end. The only downside that I have found so far is that these speakers do tend to draw some power to drive them. I am driving them with the stock Chevy radio and they need more power. I can't wait to buy some JBL 6x9 inch speakers for the rear deck and a new radio to drive them. Then my system will really ROCK!

32 of 64 found this helpful

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dodger

Oroville, WA

Overall
Durability
Value
Features
Design
Usability
Easy fit

September 17, 2013

I have a 2000 Chrysler 300M (LX body) with Infinity II sound. This requires front door speakers that are 6 3/4", with 2 ohm resistance, and are expensive and hard to find. I used these JBL's and they bolted in with no hassles whatsoever. Sonic's pricing was very competitive, and delivery was fast, as promised.

28 of 56 found this helpful

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Mr. Mike

Mt. Juliet ,Tn.

Overall
Durability
Value
Features
Design
Usability
Good speakers

September 9, 2010

Bought these to drive off HU and was not happy. Decided to put in rear and put CDT coax in front and drive with Kenwood 4 ch. amp. Well once I drove them with amp I discovered why I did not like running off HU. They are power hungry and once I had enough power to them combined with CDT's in front they sound unreal! I have always liked JBL and continue to like them. Just make sure you drive these with amp and give them the juice they need. If you do this they will perform.

41 of 82 found this helpful

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squareorbit

Nashville, Il

Overall
Durability
Value
Features
Design
Usability
JBL is the best

August 8, 2015

I have had several JBL speakers but these are the first for a car. I counted on them to be good and they are. For the cost, the sound is wonderful. The base- which all important- is superb. These would be a great upgrade for any car.

1 of 3 found this helpful

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Bro

Miami, Broida

Overall
Durability
Value
Features
Design
Usability
Yo

May 16, 2011

Bro, I heard these in my boys whip and man did they slam all by themselves. of course, they can't hit lows very well because well they're not supposed to but 4 of these lit up our ear cavities like it was the forth of july. Slammin back some nattys, + these speakers... Our life is bro.

22 of 45 found this helpful

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Ross

Elkhorn, NE

Overall
Durability
Value
Features
Design
Usability
Just ok

May 9, 2014

Kind of tinny sounding and highs tend to squeal off pitch. The mounting rings didnt work and they provided no cables in the package. Not worth the money in my opinion.

25 of 52 found this helpful

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ben

olalla, WA

Overall
Durability
Value
Features
Design
Usability
WOW

March 15, 2013

recently bought these mated them to the same 5.25"'s and put them on a gto1004 from JBL... these sound (to me) better .. cleaner, deeper, all around than the 750$ focal's i was going to use. running them on 150W rms and they love it. for the money i couldn't ask for a better sounding speaker, keep up with the JBL 1224's i have running 1100 watts each! makes the BOSE system i had in my avalanche sound like childs play. thanks sonic for stocking a great product... huge jbl fan now

21 of 44 found this helpful

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JBL MAN

LOS ANGELES CA

Overall
Durability
Value
Features
Design
Usability
GOOD SOUND

February 12, 2012

Sound good, the best you can buy. 5 all the way.

24 of 51 found this helpful

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Vegeta700

Bronx, NY

Overall
Durability
Value
Features
Design
Usability
JBL GTO638 vs polk audio dxi6500

April 17, 2013

I bought 2 pairs of these bad boys for my car. They sound awesome, great highs, enough of mids and you can get some low's but not too much. I have all 4 speakers hooked up to a 4 channel 1000 Watt amp at 125 rms for each channel. They are pretty loud when i set my volume at 15 when the radio can hold up to 50 on the radio. After 30 i get distortion. I'm really happy with my product and i do recommend these speakers and it will sound even sweeter with an amp. By the way i also own 2 pairs of the polk audio dxi6500 and i was disappointed how i spent more $$$ on them and they dont sound as good as these JBL. 2 tweeters went out on my polk audio's and i was stuck with only mids and horrible low's. they couldn't handle the power of the amp and it sounded lower than the JBL's.

25 of 54 found this helpful

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cooch

miami

Overall
Durability
Value
Features
Design
Usability
workin good for me

June 20, 2012

I put them in my 2001 chevy silverado 1500. No problems at all. Easy to install. Very good speakers.

22 of 48 found this helpful

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jorge

lexington, NE

Overall
Durability
Value
Features
Design
Usability
very clean

October 14, 2009

nice product the plus one technology makes the bass even better the highs are super clean. and adjustable

22 of 48 found this helpful

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Rod

Fort Smith, AR

Overall
Durability
Value
Features
Design
Usability
great value, great sound

April 7, 2014

The more power for these the better you will like them. Can't go wrong with these.

23 of 51 found this helpful

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Rod

Oklahoma

Overall
Durability
Value
Features
Design
Usability
Replacement Speakers

March 19, 2014

I purchased these as replacement door speakers in a 2001 Silverado. Perfect fit. With just the factory HU they sound great. The more power the better they sound. You will not be disappointed with these.

23 of 51 found this helpful

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william

el paso, TX

Overall
Durability
Value
Features
Design
Usability
great price awesome quality

February 27, 2014

Fully recommend these are great speakers for your back doors.

26 of 57 found this helpful

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Craig

Panama City, Fl

Overall
Durability
Value
Features
Design
Usability
Pretty good on factory amp

December 19, 2013

I have a 2010 Chevy Avalanche with the "premium" Bose factory system which is not so premium. I needed a 2 ohm 6 1/2 or 6 3/4 speaker to replace my door speakers cause that's what came factory so I went with these. Bought 4 (2 pair) for all my doors. Man they sound loud and clear for being run only on the factory amp and head unit. I don't see a need to add an aftermarket amp at this point.

21 of 47 found this helpful

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Bee

Michigan

Overall
Durability
Value
Features
Design
Usability
Great Value

September 1, 2014

Great Value Product Works As Stated Thank You Much

30 of 67 found this helpful

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Bee

Michigan

Overall
Durability
Value
Features
Design
Usability
Great Value

September 1, 2014

Great Product Was shipped Fast and Works Great Thank You

26 of 59 found this helpful

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Accessory Tools and Products

Accessories added

Streetwires 25 ft. of True Spec 12 Gauge Speaker Wire

You need speaker wire to connect your speakers!

Your Price $44.95

Belva 23 ft. of True Spec 12 Gauge Speaker Wire

100% Copper Clad Aluminum, high strand count with ultra-flexible PVC blended jacket for easy installation

Your Price $14.99

NVX SDSK2 Speaker Kit

Eliminates speaker panel distortion and reduces vibration, rattles, and squeaks!

Your Price $14.99

Dynamat Xtreme Speaker Kit 10415

Enough sound dampening for 2 speakers!

Your Price $17.95

Stinger Roadkill Speaker Kit

Use this to eliminate rattle from your speakers!

Your Price $13.99

Car Stereo and Speaker Installation Tool Kit

Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.

Your Price $16.99

Universal Wire Puller & Grabber

Running wires has never been easier! This wire puller allows you to run wires through those hard to reach places!

Your Price $6.99

Xscorpion 9-Piece Nylon Plastic Pry and Chisel Tool Set

Easily removes dash/trims, door clips, panels and pins, rubber grommets and vehicle emblems.

Your Price $14.99

3 in 1 Wire Quick Splice T-Tap and Butt Connector Crimper + Wire Cutter

Used for cutting copper and aluminum wires up to 8 gauge.

Your Price $29.99

NVX SDRLR1 Sound Dampening Rubber Roller

Install your Sound Dampening with ease! This heavy duty rubber roller is designed specifically to install your NVX products!

Your Price $7.99

Speaker Baffles for your Speakers

Enhance the sound of your speakers with these easy to install speaker baffles.

Your Price $9.99

Browse 2 questions and 18 answers
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Why did you choose this?
Sonic Electronix Store
I bought these to replace the stock speakers in my 4runner. A lot of good reviews so I have high hopes for these speakers. Hopefully they compliment my sub well.
Dylan S on Aug 10, 2015
Like JBL sound plus good reviews
Erol G on Jun 18, 2015
great price for a very good product
Irwin L on Jul 15, 2015
great price. heard it was a dependable site
Kenneth K on Apr 5, 2015
if i buy four speakers ( two pairs ) and use them to replace my factory speakers in my 2005 dodge dakota, how will they do? I recently put a jvc kd x210 in to replace my head unit as well. will that have enough power? if not, how big of a four channel amp will i need? THANKS!
robbie on Oct 5, 2014
Best Answer: Hello Robbie,

They will do very well. To be fair, the JVC KD-X210 will NOT have the power to push the speakers to their potential; Being that the headunit will only provide >~25w RMS . What works in your favor - and why you will get More than just the 22w the headunit is rated at - is the fact that the speakers are 2ohm, which will allow it to draw a bit more power from the headunit.
If you wish to run the speakers the way they are "intended" to, then you will want to consider an amp like the JBL GTO-504EZ , which will have all the power needed, and enough headroom to Not stress the amp.

JBL GTO-504EZ
http://www.sonicelectronix.com/item_43361_JBL-GTO-504EZ.html
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Product Summary

Manufacturer

Model Number

GTO638

UPC

050036930291

Weight

6.00lbs

Internal SKU

gto638

Internal Product ID

17735

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: JBL GTO638