Item# GT5-15



1200-Watt, 15" Single-Voice-Coil Subwoofer

$139.95139.95 each
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What's in the box?

  • (1) GT5-15 15” Single 4-Ohm Subwoofer
  • (1) Owner's Manual

Road noise can destroy realistic audio that always requires true low frequencies. Polypropylene delivers rigidity, with good internal damping, and complete weather-resistance. You get an impossible-to-miss increase in thumping bass.

With 300 watts RMS and 1200 watts of peak power handling, the GT5-15 changes the experience of listening to your favorite music in your car. And a progressive spider gives better control for lower distortion at excursion limits.

Woofer motor structures heat up during use, causing distortion, or power compression that reduces music’s dynamic range, robbing the sound of realism. JBL uses vented motor structures and polepieces that get rid of more heat to deliver more serious bang.

It’s built to the same exacting standards as JBL professional audio boxes with 3/4" medium-density fiberboard construction, and high-quality binding-post terminals. Wide-bandwidth design provides more output between 20Hz and 40Hz. You get all the bass you’ve paid for.

With a frequency response of 23Hz – 400Hz, the GT5-15 reproduces deep, teeth-rattling bass tones without distortion.

(2.83V@1m) 96dB
Peak Power
Nominal Impedance
4 ohms
Power Handling (RMS)
Power Handling (Peak)
Frequency Response
20Hz – 400Hz
Suspension Compliance
(Cms – ?m/N) 102
Voice Inductance
1kHz (Levc – mH) 2.42
Driver Radiating Area
(Sd – in2/cm2) 132.5/855
Electrical Q
(Qes) 0.76
Free-Air Resonance
(Fs – Hz) 27.3
Maximum Excursion
(Xmax –in/mm) .57/14.5
Total Q
(Qts) 0.67
Mechanical Q
(Qms) 5.7
Voice Coil Height
(Hvc – in/mm) 1.45/37
Compliance Volume
(Vas – ft3 / l) 3.76/106.5
Voice Coil DC Resistance
(Revc – ohms) 3.63
Magnetic Gap Height
(Hag – in/mm) .31/8
Motor Force Factor
(Bl – Tm) 16.53

1 Year Warranty

Products purchased online or from an authorized local retailer and under warranty may qualify for an exchange with a valid receipt.

Purchases made from an unauthorized dealer will not be eligible for exchange.

Request an Exchange

Call us: 1.800.336.4525

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  • Technical help
  • Parts and accessories

I have a 150 rms amp, is that enough to power this sub?

Asked by: Exploder001
Absolutely. The GT5-15 has an RMS wattage rating of 300 watts. This means that any amp with a power output of 300 watts per channel or less will work fine with this sub. On the other hand, if you are looking to get the sub as loud as you can get it, go with an amp that has a rating of 300 RMS watts. But do not go with anything more powerful.
Answered by: Joe G at Customer Service
Date published: 2016-08-16

What is the rms??? 

Asked by: Dountrell
Answered by: Leontreg
Date published: 2016-05-09
  • 2016-09-24T10:12CST
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