1400-watt, 15" die-cast, 4-ohm voice-coil subwoofer

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Get the lows bumping big with the GTO1514, a subwoofer design triumph from the JBL® Grand Touring® Series family. It delivers deep, solid, tight bass and serious power that can only come from the leader in live performance sound. GTO subwoofers include die-cast aluminum baskets, polypropylene cones, rubber surrounds and a unique tinsel wire protector. The GTO1514 has a 4-ohm voice coil and 1400 watts of peak power handling. It can handle whatever you can dish out. Sure, it’s your car. But we think we know what your standards are no matter where you are and where you go – and they’re ours too.

Item# GTO1514

General Specifications

Size 15"
Series Grand Touring

Audio Specifications

Peak Power 1400W
Nominal Impedance 4 ohms
Sensitivity (2.83V/1m) 93dB
Frequency Response 23Hz–400Hz
Power Handling (RMS) 350W
Power Handling (Peak) 1400W


Mounting Depth (mm) 172
Mounting Cutout Diameter (in) 13-15/16
External Diameter (in) 15-5/16
Mounting Cutout Diameter (mm) 354
Mounting Depth (in) 6-13/16
External Diameter (mm) 389

Woofer Specifications

Free-Air Resonance (Fs – Hz) 25.1
Maximum Excursion (Xmax –in/mm) 0.57/14.5
Surround Hi-roll rubber
Total Q (Qts) 0.49
Vented Polepiece Yes
Voice Coil Height (Hvc – in/mm) 1.45/37
Motor Force Factor (Bl – Tm) 17.13
Mechanical Q (Qms) 7.08
Electrical Q (Qes) 0.52
Driver Radiating Area (Sd – in2/cm2) 128.7/830
Voice Coil 2" (51mm) diameter
Suspension Compliance (Cms – ?m/N) 156
Voice Coil DC Resistance (Hvc – in/mm) (Revc – ohms) 3.8
Low-Frequency Transducer 15" (380mm) Polypropylene cone
Compliance Volume (Vas – ft3 / l) 5.42/153.5
Progressive Spider Yes
Voice Inductance @ 1kHz (Levc – mH) 3.05
Magnetic Gap Height (Hag – in/mm) 0.31/8
Diecast Aluminum Frame Yes
  • (1) GTO1514 15” ” die-cast-single-voice-coil subwoofer
  • (1) Owner's Manual

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1 Year Warranty

Note: the Warranty Card provided with your JBL product contains the full terms and conditions of your warranty.

Unless a different warranty period is stated in the Warranty Card provided with your JBL product, JBL warrants for a period of 1 year (5 years for any non-powered speakers) from the date of retail purchase by the original end-use purchaser, that this product, when delivered to you in new condition, in original packaging, from a JBL authorized reseller and used in normal conditions, is free from any defects in manufacturing, materials and workmanship. Refer to the Warranty Card provided with your JBL product for specific details including what is not covered along with other terms and conditions.

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