Boss Audio Systems GT 1480, GT 1580, GT 1380, GT 1180 specifications Precautions

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Weak Output
Noise in the Audio

Precautions

Before you drill or cut any holes, investigate your car's layout very carefully. Take care when you work near the gas tank, fuel lines, hydraulic lines and electrical wiring.

Do not operate the amplifier when it is not mounted. Attach all audio system components securely within the automobile to prevent damage, especially in case of an accident.

Do not mount this amplifier so that the wire connections are unprotected or in a pinched condition, or likely to be damaged by nearby objects.

Before making or breaking power connections in your system, disconnect the vehicle battery. Confirm that your head unit or other equipment is turned off while connecting the input jacks and speaker terminals.

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If you need to replace the power fuse, replace it only with a fuse identical to that supplied with the system. Using a fuse of different type or rating may result in damage to your system which isn't covered by the manufacturer's warranty.

Troubleshooting

Before removing your amplifier, refer to the list below and follow the suggested procedures. Always test the speakers and their wires first.

No Output

Confirm that all terminal strip connections are secure and tight.

AUDIO

 

 

 

 

 

Check both in-line and built-in fuses. Both the "+12V" and the "REMOTE" terminals

 

 

must have +12V referenced to chassis ground.

SYSTEMS

 

 

 

 

 

Confirm that the audio signal source (car radio, equalizer, etc.) is connected and

 

 

is supplying output signal. To check if the amplifier is supplying signal, unplug

 

 

the RCA cables from the signal source (but leave them plugged into the amp).

 

 

Gently tap the center pin of each of the disconnected RCA plugs with your finger.

 

 

This should produce a noise (feedback) in your speakers.

 

 

Only one

Confirm that all speaker strip connections are secure and tight.

 

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channel

 

 

 

works

Check the BALANCE control on the head unit (or other source) to verify that it

 

 

is set to its midpoint.

If you are using the Low Level RCA Inputs, reverse the input plugs at the amplifier (switches the R with the L). If the channel which is silent switches to other side, the problem is either in the head unit/other source or the connecting tables.

Readjust the Input Sensitivity Control to better suit the input signal.

If the noise is a "whine" whose pitch follows the engine speed, confirm that the amplifier and any other signal sources ( head unit, etc.) are properly grounded.

If the noise is a "clicking" or "popping" noise whose rate follows the engine speed, this usually means that the vehicle is equipped with resistor spark plugs and wires, or that the ignition is in need of service.

Check the routing of the speaker and input wires to make sure they are not adjacent to wires which interconnect lights and other accessories.

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Contents Audio Audio ModelA T U R E S Systems Mode Switch Settings Fi ve Channel a mpl i f i er Mode Switch 4ch PositionHigh Level Inputs 5 Channel Amplifier GT Four Channel Amplifiers GT1180, GT1380, GT148Four Channel Speaker Wiring Bridged Speaker WiringFour Channel Amplifiers GT 1180, GT 1380, GT1480 Component ValuesFive Channel Amplifiers Five Channel Speaker WiringFive Channel Amplifier Precautions