Hey I recently had installed a new amplifier to my mids and tweeters... I picked up an extreme amount of engine noise from it..
Never had problems with the old amp.. Im using the same ground, same cables and everything. Everythings the same besides the amplifier. Even my RCA's are run on a different sides from the power wire.....
Even the amplifiers are from the same company just different models.. Im running the Rockford Fosgate 160a2 now... Any help would be great..
P.S. I tried turning the gain down but to eliminate engine noise to an accetable level, but the gain has to be set at a rediciously low level to even hear a difference.. Not worth it..
Replies (1)
Swez on 11/15/2003 09:21:19
Hello Curtis, long time no see!
These are the pests we can live without huh? Engine noise in audio chain is one of the hardest things to debug!
It all boils down to a well grounded system, adequate HU RCA voltage and decent quality wires & placement of same.
Read these:
1. http://www.eatel.net/~amptech/elecdisc/ground.htm
2. http://www.eatel.net/~amptech/elecdisc/glisoltr.htm
3. http://www.eatel.net/~amptech/elecdisc/audiots.htm
To help isolate this noise to its source, you may wish to try a patch cord deal using a Walkman and headphone jack to RCA inputs on the new amp. If there is little or no noise in the system with only Walkman, Amp and speakers in the circuit... your problem is either the HU grounding point of RCA cables are not sufficient. Try 1 channel at a time to see is one is noisy while the other is quiet. If you find this is true, amp problems are likely the cause of this noise.
If you have noise in the system as test above setup is used, grounding the amps in a new place is an option. If the system is quiet and more or less noise free... your source of noise is the HU, RCA lines. (HU to amp)
Vexing issues here friend! Good luck and let us know how you make out OK?
Swez
Never had problems with the old amp.. Im using the same ground, same cables and everything. Everythings the same besides the amplifier. Even my RCA's are run on a different sides from the power wire.....
Even the amplifiers are from the same company just different models.. Im running the Rockford Fosgate 160a2 now... Any help would be great..
P.S. I tried turning the gain down but to eliminate engine noise to an accetable level, but the gain has to be set at a rediciously low level to even hear a difference.. Not worth it..
Replies (1)
Swez on 11/15/2003 09:21:19
Hello Curtis, long time no see!
These are the pests we can live without huh? Engine noise in audio chain is one of the hardest things to debug!
It all boils down to a well grounded system, adequate HU RCA voltage and decent quality wires & placement of same.
Read these:
1. http://www.eatel.net/~amptech/elecdisc/ground.htm
2. http://www.eatel.net/~amptech/elecdisc/glisoltr.htm
3. http://www.eatel.net/~amptech/elecdisc/audiots.htm
To help isolate this noise to its source, you may wish to try a patch cord deal using a Walkman and headphone jack to RCA inputs on the new amp. If there is little or no noise in the system with only Walkman, Amp and speakers in the circuit... your problem is either the HU grounding point of RCA cables are not sufficient. Try 1 channel at a time to see is one is noisy while the other is quiet. If you find this is true, amp problems are likely the cause of this noise.
If you have noise in the system as test above setup is used, grounding the amps in a new place is an option. If the system is quiet and more or less noise free... your source of noise is the HU, RCA lines. (HU to amp)
Vexing issues here friend! Good luck and let us know how you make out OK?
Swez
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