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PROBLEM
Subwoofer is too quiet, even with the vehicle
audio system's source unit volume all the way
up.
Sound in the subwoofer is distorted
SPECIFICATIONS
Max power (15.5V, 50Hz, 10%THD, 2 ohms)
Rated power output
Signal-to-noise
Frequency response
Input sensitivity/impedance (low-level input)
Input sensitivity/impedance (speaker-level input)
Fuse replacement
Dimensions (H x W x D)
Weight
CAUSES AND SOLUTIONS
• Check that the GTX500's Volume control is not turned too low. See Set The GTX500's Volume,
on page 9, for more information.
• While listening to bass-heavy music, turn the Bass Boost control all the way down (counter-
clockwise), and then gradually increase it until the distortion begins to return. Reduce the Bass
Boost control setting slightly to eliminate the distortion and leave it set there.
• Check that the distortion is not originating from the vehicle audio system's source unit.
GTX500
770W x 1
350W RMS x 1 @ 4 ohms, 14.4V DC, <1.0% THD
500W RMS x 1 @ 2 ohms, 14.4V DC, <1.0% THD
>80dB ref. 1W
20Hz – 200Hz (±0.5dB); 10Hz – 300Hz (±3dB)
100mV – 2V/>7k ohms
2V – 15V/120 ohms
25A x 2
2-9/16" x 9-11/16" x 8-3/8"
(66mm x 246mm x 213mm)
6.4 lb (2.9kg)
11
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www.jbl.com
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