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GTR AMPLIFIERS
CHAPTER 5: TROUBLESHOOTING
PROBLEM: No audio and POWER INDICATOR is off.
CAUSE and SOLUTION: No voltage at BATT+ and/or REM terminals, or bad or no ground connection. Check voltages at amplifier terminals with VOM.
PROBLEM: No audio and PROTECT INDICATOR flashes every 4 seconds.
CAUSE and SOLUTION: DC voltage on amplifier output. Amplifier may need service.
PROBLEM: No audio and PROTECT INDICATOR is on.
CAUSE and SOLUTION: Amplifier is overheated. Make sure amplifier cooling is not blocked at mounting location. Verify that speaker-system impedance is within
specified limits. Or, there may be voltage greater than 16V (or less than 8.5V) on BATT+ connection. Check vehicle charging system.
PROBLEM: No audio and PROTECT and POWER INDICATORS flash.
CAUSE and SOLUTION: Voltage less than 9V on BATT+ connection. Check vehicle charging system.
PROBLEM: Distorted audio.
CAUSE and SOLUTION: Gain is not set properly. Check INPUT LEVEL setting. Check speaker wires for shorts or grounds. Amplifier or source unit may be defective.
PROBLEM: Distorted audio and PROTECT INDICATOR flashes.
CAUSE and SOLUTION: Short circuit in speaker or wire. Remove speaker leads one at a time to locate shorted speaker or wire, and repair.
PROBLEM: Music lacks dynamics or “punch.”
CAUSE and SOLUTION: Speakers are not connected properly. Check speaker connections for proper polarity.
PROBLEM: Amplifier fuse keeps blowing.
CAUSE and PROBLEM: The wiring is connected incorrectly or there is a short circuit. Review installation precautions and procedures in manual. Check wiring
connections.
PROBLEM: Engine noise—whining or clicking—in system when the engine is on.
CAUSE and PROBLEM: Amplifier is picking up alternator noise. Turn down gain. Move audio cables away from power wires. Install an alternator noise filter on power
line between battery and alternator. Check ground connections on the amplifier since a loose or improper ground is one of the main causes for extraneous noise
in your audio system.
CHAPTER 6: SPECIFICATIONS
Model RMS power @ 4 ohms RMS power @ 2 ohms
RMS power @ 4 ohms
Bridged
Total peak
power
Frequency response
Maximum
signal input
Maximum
sensitivity
Line in signal-to-noise ratio
(reference to 1 watt @ 4 ohm)
GTR-102 100W x 2, ≤0.1% THD+N 120W x 2,≤0.1% THD+N 240W x 1, <0.3% THD+N 700W 15Hz-35kHz 10V 200mV ≥75dBA
GTR-104 100W x 4, ≤0.1% THD+N 120W x 4, ≤0.1% THD+N 240W x 2, <0.3% THD+N 1500W 15Hz-35kHz 10V 200mV ≥75dBA
GTR-7535
75W x 4, ≤0.1% THD+N 100W x 4, ≤0.1% THD+N 200W x 2, <0.3% THD+N
2300W
15Hz-35kHz
(full range),
10V 200mV
≥75dBA (full)
200W x 1, ≤0.1% THD+N 350W x 1, ≤0.1% THD+N – 15Hz-320Hz (sub) ≥80dBA (sub)
GTR-601 380W x 1, ≤0.1% THD+N 600W x 1, ≤0.1% THD+N – 1500W 15Hz-320Hz 20V 200mV ≥80dBA
GTR-1001 700W x 1, ≤0.1% THD+N 1000W x 1, ≤0.1% THD+N – 2600W 15Hz-320Hz 20V 200mV ≥80dBA
Model
BT signal-to-noise ratio
(reference to 1 watt @ 4ohm)
THD+N at rated
power (@ 1K Hz)
Bluetooth version Supported codecs
Dimensions
(L x W x H) mm/inch
Unit Weight
(kg/lbs.)
Operating
voltage
Fuse size
GTR-102 ≥80dBA ≤0.1% Bluetooth 3.0+EDR
A2DP V1.3, AVRCP V1.5,
HFP V1.6
225.3 x 179.6 x 54.2mm
8-7/8” x 7-1/8” x 2-3/16”
3.2kg
7.1 lbs.
9-16VDC 30A x 1
GTR-104 ≥80dBA ≤0.1% Bluetooth 3.0+EDR
A2DP V1.3, AVRCP V1.5,
HFP V1.6
265.3 x 179.6 x 54.2mm
10-1/2” x 7-1/8” x 2-3/16”
3.8kg
8.4 lbs.
9-16VDC 30A x 2
GTR-7535 ≥80dBA
≤0.1%
Bluetooth 3.0+EDR
A2DP V1.3, AVRCP V1.5,
HFP V1.6
335.3 x 179.6 x 54.2mm
13-1/4” x 7-1/8” x 2-3/16”
4.6kg
10.1 lbs.
9-16VDC 30A x 3
≤0.1% (@ 50Hz)
GTR-601 N/A ≤0.1% (50HZ) Bluetooth 3.0+EDR
A2DP V1.3, AVRCP V1.5,
HFP V1.6
265.3 x 179.6 x 54.2mm
10-1/2” x 7-1/8” x 2-3/16”
3.02kg
6.7 lbs.
9-16VDC 35A x 2
GTR-1001 N/A ≤0.1% (50HZ) Bluetooth 3.0+EDR
A2DP V1.3, AVRCP V1.5,
HFP V1.6
335.3 x 179.6 x 54.2mm
13-1/4” x 7-1/8” x 2-3/16”
3.8kg
8.4 lbs.
9-16VDC 35A x 3
10
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