GT7 Series 6-3/4" component speaker system

Item #: 109JBLG76C

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6 Reviews

Installation gear for most cars

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A cool upgrade

These GT7-6C component speakers from JBL have everything you want when shopping for a car speaker: an advanced design, quality materials, a cool look, and a practical price tag. But in the end, it's what they sound like that matters most, and true to their iconic heritage, these JBLs deliver.

How do they do it?

You'll gain a satisfying boost in sound quality from this component system, thanks to JBL's patented Plus One™ architecture, which expands the surface area of the 6-3/4" polypropylene woofer for impressive bass. And the edge-driven dome tweeters handle a wider range in the high frequencies for more natural sound — vocals, in particular, benefit from a smoother transition from the midrange. The external crossovers direct the right frequencies to the each driver to ensure a balanced sound.

JBL built these GT7 speakers to handle up to 50 watts RMS, so they'll perform spectacularly with an aftermarket radio or amp, but with a design geared toward maximum efficiency, you'll get superior performance even from a factory radio. Grilles are included for a custom installation.

Installation note: You'll need a pair of our universal backstraps to install the tweeters in the factory locations.


  • component speaker system includes 2 woofers, 2 tweeters, and 2 external crossovers
  • 6-3/4" polypropylene Plus One™ woofer cone with foam surround
  • 1-13/16" edge-driven dome PEI tweeter
  • power range: 2-50 watts RMS (150 watts peak power)
  • frequency response: 50-20,000 Hz
  • sensitivity: 92 dB
  • woofer top-mount depth: 2-3/8"
  • grilles included
  • warranty: 1 year
  • Our 60-day money-back guarantee

Why install component speakers?

A component speaker system gives you the best possible performance from your car audio system. A system consists of separate woofers, tweeters, and crossovers, each designed to cover one specific range of frequencies. As separate components, the woofer can move freely to deliver more powerful performance, while the tweeter can be custom-mounted in a better spot up closer to your ears, revealing a whole new world of detail. Separate crossovers are far superior to the simple filters wired into full-range speakers, so the components work together for smoother, more focused sound.

JBL GT7-6C Reviews

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No bass

Written By Mm, California on Sunday, October 25, 2015

Crutchfield Customer Review (What's this?)

There is no bass and the tweeters are too high. Too many modifications to install in a Tacoma.

Pros: They look nice.

Cons: Not enough space, customer service was no help Crutchfield.

good for the price..

Written By Fharris, Kountze, TX on Thursday, September 24, 2015

Crutchfield Customer Review (What's this?)

For the price there actually pretty good. I had heard a lot of good things about Jbl and when they went on seal, I just had to get them. The bad part, the highs are Way to high. I have to turn all the highs down because they were so high they hurt my ears..

Pros: Great if your on a tight budget but want a good name speaker.

Cons: The highs are to loud and cause me a huge headache..

Great sound for my Tacoma

Written By Tom, Corry, Pa on Sunday, September 20, 2015

Crutchfield Customer Review (What's this?)

These speakers sound great, way better than the stock speakers. Easy to install with the adapter brackets that Crutchfield sent with them. Using just stock radio to power them for now, they handle the volume at max. Unlike the stock speakers which distorted. Planning on installing amp next year to power the speakers. I installed the tweeter in the upper door location where the stock tweeter was located. It took a little fabrication to get the tweeter to fit. The crossover was easy to mount near the tweeter behind the door panel. The 2014 Tacoma still has a full stock look.

Pros: Sound quality.

Cons: I wish the tweeter had more mounting options than surface mount.

Day and Night over stock

Written By Chris, New Jersey on Wednesday, August 12, 2015

Crutchfield Customer Review (What's this?)

Today I replaced the factory components(Front door) in my 15 Tucson SE. These sound WAY better than stock. I will JBL credit. The Crossovers were small enough to mount inside the door without much grief. Supplied an Allen bit for the screws.

Pros: Sound Quality Supplied Allen Bit for screws Crossover Modules are Compact. Maybe a deck of cards.

Cons: No Pigtails supplied by JBL to run between the Crossover and tweeters. Wires are attached to the tweeters. Had to cut and solder wires to feed Crossover Modules as Crutchfield doesn't have them available for my 15 Tucson. Not a problem for me. just a Heads Up. Crutchfield did supply me with a Wire Color chart for Pos and Neg.

I LOVE THESE!!!!!!!!!!!

Written By Matt in CT, CT on Tuesday, March 31, 2015

Crutchfield Customer Review (What's this?)

These sound amazing with the little amp I installed.

Pros: ALL!!!!!!!!!!!!!!!!!!!!

Cons: NONE!!!!!!!!!!!!!!!


Written By Anonymous, Guaynabo, PR on Tuesday, December 30, 2014

Crutchfield Customer Review (What's this?)

Excelent item

Hands-on research

What's in the box?

Download owner's manual

  • 2 Woofers
  • 2 Tweeters (each with 6" wire attached)
  • 2 Crossovers
  • 2 Woofer grilles
  • 2 Surface mount tweeter housings
  • 2 Angled surface mount tweeter housings
  • Eight 1-1/8" Self-tapping Allen head screws
  • 3mm Allen head bit
  • 8 Speed clips
  • Four 1" Pan head self-tapping screws
  • Four 5/8" Flat head self-tapping screws
  • Four 3/8" Flat head self-tapping screws
  • Instruction manual

Product Research



Plus One Woofer Cones: The Plus One woofer cones offer more surface area than other speakers that fit in the same size opening. This is accomplished by using a new basket design and hi-roll surround. The result is greater bass output and an increase in efficiency.

Size Classification: Some manufacturers, including JBL, call this size speaker a 6-1/2". Because it requires a larger cutout than a standard 6-1/2" speaker, Crutchfield has traditionally referred to this size woofer as a 6-3/4". Please refer to the Crutchfield Vehicle Selector to confirm fit in your vehicle.


Tweeters: The edge-driven dome tweeters are made of PEI (Poly-Ether-Imide). PEI is a polymer film, capable of producing a wide soundstage.

Tweeter Mounting Options: Using the supplied housings the tweeters can be surface mounted flat or surface mounted at an angle (no flush mount housing is included). Once mounted in the appropriate housing, the tweeters have these dimensions:

  Surface Mount Angled Surface Mount
Mounting Depth screw depth screw depth
Mounting Height 0.884" 1.844"
Cutout Diameter N/A N/A
Frame Diameter 1.8" 1.8" x 2.21"


Connections: The passive crossovers feature screw terminal inputs and outputs; they will accommodate bare wire or spade connectors up to 1/4" wide.

Tweeter Level: A switch in each crossover allows you to adjust the output level of the tweeter; choose 0 dB or +2 dB.

Mounting: Each crossover can be mounted using two of the included screws through two holes in the base.


  • Length: 2.625"
  • Width: 1.825"
  • Height: 0.940"

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

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6-3/4" component speaker system

The JBL GX600C offers these features:

edge-driven soft dome tweeter for smoother highs

rubber surround for better durability

power handling up to 70 watts RMS