JBL GTO939 with Speaker Installation Kit

600W Peak (200W RMS) 6x9" 3-WayCoaxial Speakers with Speaker Baffles, Sound Dampening, Roller, and Panel Removal Kit

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• Peak Power: 600W
• RMS Power: 200W
• Edge Driven Textile Soft Dome Tweeter
• Mounting Depth: 3" • Plus One Carbon Injected Woofer Cone
• 3 Ohms Impedance
• Sensitivity: 94dB

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Professional JBL Sound:

The JBL GTO series speakers are the perfect upgrade to your existing speakers. They are designed with a carbon-injected cone material to accurately reproduce music the way the artist originally intended. The three ohm voice coils allow the speaker to operate at an efficient 4 ohms once they are being powered, allowing them to utilize every watt of power your head-unit or 4ohm stable amplifier can produce. These speakers feature a vented magnet with a high thermal-capable voice coil which effectively dissipates heat, ensuring the longevity of your investment. The edge-driven speaker cones allow greater sound levels with the same amount of power. The wide frequency responses that these speakers provide will leave your ears very satisfied when you're listening to your favorite songs. If quality is your goal, the GTO series speakers by JBL have the technologies to make that happen.

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.


600W Peak (200W RMS) 6"x9" GTO Series 3-Way Coaxial Car Speakers
Quantity: 1

Product Details:

  • 6" x 9" GTO Series 3-way Coaxial Car Speakers
  • Power Handling:
    • Peak: 600 watts per pair / 300 watts each
    • RMS: 200 watts per pair / 100 watts each
  • Carbon-injected cone material
  • Butyl Rubber speaker surround
  • 1" Silk Edge-Driven Dome Tweeters
  • Patented Plus One glass fiber woofers
  • UniPivot and angled tweeter
  • Vented magnet assemblies
  • Adjustable tweeter level
  • Top-mount Depth: 2-7/8"
  • Cutout Dimensions: 5-7/8" x 8-5/8" 
  • Impedance: 3 ohms
  • Frequency Response: 46 - 21000 Hz
  • Sensitivity: 94 dB
  • Grilles included
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

  • Priced Per Pair


2 Piece Universal 6x9” Silicone Rubber Speaker Baffles with Self Adhesive Foam Base Pad
Quantity: 1

Product Details

  • Foldable Silicone with egg crate foam
  • Foldable rings allows for perfect fitment at varying depths
  • Creates a tight seal around your speaker for optimum sound quality
  • Compatible with 6" x 9" speakers
  • Mounting Depth: 1-7/16" (Front)
  • Mounting Depth: 3-3/8" (Back)
  • Waterproof material
  • Reduce door panel vibration
  • Easy Installation with minimal trimming or cutting
  • The foam baffles from the competitors will deteriorate over time, while the silicone XBAF65's will last a lifetime
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

NVX SDBSK2 Premium Stealth Black

Premium Sound Damping (Sound Deadening) Speaker Kit, two 10" x 10" Sheets (91mil THICK)
Quantity: 1

Product Details:

  • Two 10" x 10" Pieces of Sound Dampening Material
    • 91mil thick (2.3mm)! There are cheaper, inferior solutions at 50-80mil, but we do not recommend that thin of a solution as it will not perform as well.
  • Great sound damping for installing with car door speakers
  • 1.38 Square feet total
  • Made from 100% Butyl Rubber
  • Eliminates road noise
  • Quiets vibrations
  • Increases sound quality and output of car audio system
  • Stops rattles
  • Increases SPL
  • Reduces heat
  • Easy to form aluminum conforms to desired area of vehicle with ease
  • Four step peel and stick design for easy installation
  • Up to 30% thicker than the leading competitors
  • Dimensions (each piece): 10"L x 10"W
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty


Universal Professional Heavy Duty Roller for Sound Damping (Sound Deadening)
Quantity: 1

General Features

  • Universal - works with NVX and other brands
  • Professional, Heavy Duty Roller Tool (used at car stereo shops worldwide)
  • 2" Solid Rubber Roller
  • Unique squared rollers provides more pressure for better installation
  • This roller allows for even pressure of application, reduce air bubbles and achieves the good adhesion.
  • Contoured handle for comfortable handling
  • Soft Rubber Won't Scratch Surfaces
  • Sturdy plastic construction for durability
  • Dimensions
    • Roller Size :4.8x3.5cm / 1.89"x1.38"(H*D)
    • Handle Size:13.3x2.7cm / 5.24"x1.06"(L*Max.D)
    • Total Length:18.5cm / 7.28"(L)
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Six Piece Professional-Grade Installer Panel Removal Tool Kit for Car Stereo/Speakers (Belva BTK106)

Six Piece Installer's Panel Removal Installation Tool Kit for Car Stereo, Speakers and Car Audio Installs
Quantity: 1

General Features:

  • Six Piece Installer's Removal Tool Kit
  • Durable Nylon Plastic Pry & Chisel Tool Set
  • Helps with car stereo installation
  • Use for dash & trim removal
  • Perfect for door panel removal
  • Use to remove vehicles emblems
  • Use to remove rubber grommets
  • Also Available as a 12 piece set: Belva BTK112
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Product history:

JBL GTO939, XBAF69, SDSK2, SDRLR1, BTK106 thumbnail
(newest, current model)
JBL GTO938 thumbnail
(previous model, replaced by JBL GTO939 with Speaker Installation Kit)
JBL GTO937 thumbnail
(previous model, replaced by JBL GTO938)

Specifications & Details

Speaker Specifications
GTO Series
Priced Per
Speaker Size
6" x 9"
3-way Coaxial
Tweeter Design
Tweeter Size
Tweeter Composition
Woofer Composition
Carbon Composite
Woofer Surround
Butyl Rubber
Peak Power Handling
300 watts
RMS Power Handling
100 watts
94 dB
Frequency Response
46 - 21000 Hz
Impedance (Per Voice Coil)
3 ohms
Shallow Mount Installation
Top-Mount Depth (Mounting Depth)
Bottom-Mount Depth
Cutout Dimensions
5-3/4" x 8-5/8" 
Number of Speakers
General specifications
Speaker Grilles
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Item Details



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Customer Ratings & Reviews

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Customer Reviews

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The following review is for GTO939, which is a part of the bundle you are viewing.

I'm picky about sound, and these sound great. Replaced some other aftermarket 6x9's with these. Great bass, would never know that they have a relatively shallow mounting depth. Fit in the doors of my Tacoma 2012. Ridiculous power handling. I'm no 6x9 aficionado, but they're the best I've heard.

By Wandulonian on January 13, 2013


found this helpful.

Good sounding speaker but...

The following review is for GTO939, which is a part of the bundle you are viewing.

I put these in a 92 Dodge Ram Pickup. Speaker location is not great in the first place seat partially blocks them. Overall sound quality is great having had JBL speakers in the past both Home and Auto. First problem I had is I did not have mirror imaged so one of the speakers fired the tweeter into the seat even more (no matter how I turned the speakers to make them work). One thing I did not like was the plastic housing for the speaker instead of metal. Also in the design of the mounting system for a flush mount is not the greatest, which is what I have in my doors. This truck is not a very smooth riding truck in the first place (rides like a lumber truck). I fear the housing is going to crack and break over time, only time will tell on that. To get a better sound image in this truck i put JL Audio tweeters on the pillars for the window to pull the high up to where you can hear the highs better. Advise from a Audio Shop it worked. Part of the problem is the design of the truck not the speaker. They are still a real good sounding speaker overall. They were put in as an upgrade from some cheap speakers I put in years ago. They made a Huge difference in the sound quality compared to the ones that I replaced for the better.

By Clueless on September 11, 2013


found this helpful.


The following review is for GTO939, which is a part of the bundle you are viewing.

Since my sub was over powering my highs and mids, I bought these to help level out the playing field and these 6x9's deliver! Worth every penny! I recommend you hook them up to an amp, they'll definitely help your highs and mids out!

By bgj361 on September 17, 2013


found this helpful.

Don't go without it

The following review is for SDBSK2, which is a part of the bundle you are viewing.

This really helps with overall sound quality, especially mid-bass in my experience. NVX offers excellent quality at better prices are than other popular sound deadening brands.

By Anonymous on September 9, 2019 checkmarkIcon Verified purchase


found this helpful.

Very Thick Dynamat

The following review is for SDBSK2, which is a part of the bundle you are viewing.

This product is very thick compared to cheap versions. Priced excellent. If you want to reduce any vibration or road sound, choose this!

By Adrian on June 21, 2020 checkmarkIcon Verified purchase


found this helpful.

Awesome set of tools

The following review is for BTK106, which is a part of the bundle you are viewing.

These trim tools came in handy and were a big help. Great value for these tools.

By Fireguy on February 2, 2020 checkmarkIcon Verified purchase


found this helpful.

Six Piece Professional-Grade Installer Panel Removal Tool Kit for Car Stereo/Speakers (Belva BTK106)

The following review is for BTK106, which is a part of the bundle you are viewing.

they worked as advertised. I was able to remove the the plastic holding in the speakers of my grand cherokee with out destroying the dash. a must have for DIY installers

By Anonymous on May 28, 2018 checkmarkIcon Verified purchase


found this helpful.

Very slick tools to efficiently slip wires/cables into car interiors

The following review is for BTK106, which is a part of the bundle you are viewing.

This kit was recommended by the Sonic Professional Installer staff to slip a wiring harness from the trunk beneath leather seat corner, beneath door entry panels into plastic wire channel, and on through the dash of a 96 Lincoln Town Car. I was dubious that it would be needed but found it protected the continuity of wire insulation, made the job easier, and was indispensable for removing the plastic fasteners holding the knee protection panels beneath the dash. Most home workshops do not have tools equal to the job that can prevent gouges and mars in these expensive interior panels. They are sturdy and well worth the price.

By Anonymous on October 29, 2018 checkmarkIcon Verified purchase


found this helpful.

Good product

The following review is for SDBSK2, which is a part of the bundle you are viewing.

Sticky and did hook well to the cars body . Got it for free with my speakers purchase. Sonic electronix for life

By Anonymous on October 6, 2019


found this helpful.

Great deal

The following review is for SDBSK2, which is a part of the bundle you are viewing.

Got this product free with the purchase of a pair of speakers it helps out a lot looks more professional and sounds cleaner definitely give it a try for your next project.

By Anonymous on August 8, 2019


found this helpful.


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