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Old 9th March 2012, 10:19 AM   #1
htgeek is offline htgeek  United States
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Default Channel 3 not working but works when bridged

I have a 4 channel car amp and all the channels work fine by themselves except channel 3 but it will work fine when bridged with channel 4. Checked my RCA cables, there fine, dont think it would be the head unit either. There are no switches on the amp its just a simple 4 channel amp. So does anyone know what might be happening, is part of the amp blown?
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Old 9th March 2012, 11:59 AM   #2
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Quote:
Originally Posted by htgeek View Post
I have a 4 channel car amp and all the channels work fine by themselves except channel 3 but it will work fine when bridged with channel 4. Checked my RCA cables, there fine, dont think it would be the head unit either. There are no switches on the amp its just a simple 4 channel amp. So does anyone know what might be happening, is part of the amp blown?
The usual things to check are fuses in this case applying to Channel 3 ( if there is a fuse for each channel ) Unsure if you have 4 speakers If you have a multimeter check ohms of the speaker(s) to make sure they are OK typical measurements between + and - is usually 4-8 ohms.

Check and recheck all wiring,particularly relating to the speakers. If you have color coded wiring ensure all + go to + of speakers, and all - go to all -, and that you have no loops or series connections of speakers.... this can make one speaker work but not the other.
Wiring of speakers is parallel meaning L + Chanel 1 of amp goes to L+ of that speaker and L- of Chanel 1 amp goes to L- of that speaker, etc.... through to Channel 4 .... NO
SERIES wiring .

Cheers / Chris
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