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JBL GTO509C 5-1/4" component speaker system

Item # 109GTO509C

If you're in the market for new speakers, you've just found a serious contender.

Find what Fits your vehicle

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If you're in the market for new speakers, you've just found a serious contender.

1 question - 1 answer

Item # 109GTO509C

Shop all JBL Component Speakers

About the JBL GTO509C

Alexander H.

Go for it

If you're in the market for new speakers, you've just found a serious contender. JBL created their GTO509C 5-1/4" component speaker system as a hi-fi solution for those who want better sound in their vehicle.
JBL GTO509C

Go for it

If you're in the market for new speakers, you've just found a serious contender. JBL created their GTO509C 5-1/4" component speaker system as a hi-fi solution for those who want better sound in their vehicle.

JBL innovation

You'll find JBL's unique Plus One woofer cone design at work here, which expands the diaphragm area of the cone to provide better low-frequency response. Edge-driven soft dome tweeters ensure a rich experience in the upper frequencies, defined by a bright, open quality. JBL includes dedicated passive crossover networks to give your high notes superior clarity. You can also use the adjustable level control to tweak your tweeters to your liking, so the GTO509C's sound is customized to your car.

These JBLs offer slightly lower impedance than standard car speakers, so they'll safely draw a little more power from your car stereo, yielding big volume even with low-powered factory radios. But if you want to blast these babies, they'll handle up to 75 watts RMS from an outboard amplifier.

Tweeter hardware

No matter how complicated your car's interior, JBL's versatile I-mount and Starfish mounting hardware gives you plenty of options for flush- or surface-mounting these tweeters. This JBL component system will add detail and dimension to your music.

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

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Highlights:

  • component speaker system includes 2 woofers, 2 tweeters, and 2 external crossovers
  • 5-1/4" carbon-injected Plus One™ woofer cone
  • 3/4" edge-driven silk dome tweeter
  • power range: 5-75 watts RMS (225 watts peak power)
  • impedance: 3 ohms
  • frequency response: 67-21,000 Hz
  • sensitivity: 92 dB
  • woofer top-mount depth: 2-1/4"
  • grilles included
  • warranty: 1 year
  • MFR # GTO509C

What's in the box:

  • 2 Woofers
  • 2 Tweeters (each with 6" wire attached)
  • 2 Crossovers
  • 2 Woofer grilles
  • 2 Flush-mount cups
  • 2 Threaded flush-mount adapters
  • 2 Plastic locking nuts
  • 2 Surface-mount cups
  • 2 Starfish tweeter mounts
  • Eight 1-3/16" Self-tapping Allen head screws
  • Four 3/4" Self-tapping pan head screws
  • Six 5/8" Self-tapping flat head screws
  • 3mm Allen head bit
  • 2 Washers
  • 2 Nuts
  • 8 Speed clips
  • 2 Adhesive backed foam gaskets
  • 4 JBL logos
  • Template on box
  • Owner's manual

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4.5 out of 5 stars
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More details on the JBL GTO509C

Pat M.

Features & specs

General
Speaker Size 5 1/4
Design 2-way
Tweeter Design 3/4" Edge-Driven Dome
Impedance (Ohms) 3
Tweeter Composition Silk
Woofer Composition Carbon-injected
Woofer Surround Butyl Rubber
Parts Warranty 1 Year
Labor Warranty 1 Year
Specifications
Sensitivity (1W at 1 meter) N/A
Sensitivity at 2.83 volts 92
Frequency Response 67 - 21k Hz
Minimum RMS Wattage 5
Maximum RMS Wattage 75
Peak Power Handling (Watts) 225
Top-mount Depth (Inches) 2 5/16
Bottom-mount Depth (Inches) 2 7/16
Cutout Diameter or Length (inches) 4 11/16
Mounting Height (Inches) 0.3
Frame Width 5.188
Frame Length 5.188

Product Research

Features

Plus One Woofer Cones: The Plus One speaker 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.

FRP Frames: The fiberglass-reinforced plastic (FRP) frames used in the GTO series woofers resist warping, even when mounted on uneven surfaces. The nonmagnetic carbon composite has no impact on the motor structure and the plastic doesn't resonate.

High-Output Design: The 3Ω voice coil design compensates for the high in-line resistance of small gauge factory wiring, extracting more power from factory (or aftermarket) receivers. This results in clearer, richer sound for the listener.

Tweeters: The edge-driven soft dome tweeters can be mounted several different ways using the included hardware:

  • I-Mount System: The tweeters can be surface- or flush-mounted with JBL's I-Mount system:
    • Surface Mount: Surface mounting the tweeters involves screwing the surface-mount cup to the mounting location, then inserting and locking the tweeter into the cup.
    • Flush Mount: Once a cutout is made, the tweeter is installed in the flush-mount adapter, then into the flush mount housing and inserted into the hole. The large plastic locking nut is threaded onto the housing (from behind the mounting surface) to hold the assembly securely in place. When flush mounted, the tweeters may be angled for optimum imaging.
  • Starfish Mounting Brackets: The Starfish mounting brackets allow the tweeters to be installed in factory locations behind the grilles:
    • Bottom Mount: Once the Starfish bracket is trimmed, it is secured to the underside of the grille panel. The tweeter must be inserted into the bracket and locked into place before the bracket is mounted.
    • Surface Mount: Once the Starfish bracket is trimmed, it is screwed to the top of the mounting surface behind the grille panel. Then, the tweeter is inserted into the bracket and locked into place.
    • Flush Mount: There are two sets of tabs to flush mount the tweeter in the Starfish bracket, yielding different mounting dimensions. The upper tabs mount the tweeter completely below the opening and are glued in place. The lower mounting tabs are screwed in place and result in a mounting height just under a half inch. Once the bracket is mounted, the tweeter is inserted into the bracket and locked into place.

Mounting Dimensions:

  I-Mount Surface Mount I-Mount Flush Mount Starfish Bottom Mount Starfish Surface Mount Starfish Flush Mount Starfish Flush Mount (below mounting surface)
Mounting Height 0.845" 0.626" 0.0" 0.835" 0.363" 0.211"
Depth 0.51" (screw depth) 0.788" 0.944" 0.51" (screw depth) 0.475" 0.627"
Frame Diameter 1.482" 1.846" 3.05" 2.446" 2.296" 2.296"
Cutout Diameter N/A 1.586" N/A N/A 1.51" 1.125"

Crossover Connections: The passive crossovers feature screw terminal inputs and outputs; they will accommodate bare wire or spade connectors up to 0.315" wide.

Tweeter Level: A switch on each crossover allows you to adjust the output level of the tweeter; choose 0 dB (flat) or +3 dB.

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

Crossover Dimensions:

  • Length: 3.085"
  • Width: 4.725"
  • Height: 1.180"

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Customer Q&A

1 question already asked

Q
What type of amp is good for powering 4 of these speakers??
johnathan  Dec 05, 2016
1 answer
A
Thanks for your question. For information on selecting the best amp I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the amp models and help you make the best choice for your system.
kenneth  Dec 06, 2016 (Staff)

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