Can this be caused by a bad ground?

[RCP Audio]

Have you tried swapping the RCA's at the amp. So putting RCA 1&2 into channel 3&4 and RCA 3&4 into channel 1&2?

not sure if thats what you mentioned you did earlier, or if you fully changed out the RCA's.

[One Way]

Have you tried swapping the RCA's at the amp. So putting RCA 1&2 into channel 3&4 and RCA 3&4 into channel 1&2?

not sure if thats what you mentioned you did earlier, or if you fully changed out the RCA's.

Have you tried swapping the RCA's at the amp. So putting RCA 1&2 into channel 3&4 and RCA 3&4 into channel 1&2?

not sure if thats what you mentioned you did earlier, or if you fully changed out the RCA's.

yeah, i tried switching between rcas. I even put my bass amp rcas on there and nothing, it only does it on chn. 3&4 thats it nothing else.

Im starting to think it might be the actual rca outputs on my amp. Any idea if theres a fix to that?

[Tarball]

First ground the amp properly. You can f-shit up with a bad ground. After the amps is grounded right, if you stil have the issue, post again and include pictures of your ground. A short video of your setup including a reproduction of your problem would be best.

[snafu]

http://www.audiosavi...per/CTR254.aspx

These are the rcas im running, i know theyre not good quality but they work.

You're part way there. This is s 4ch twisted pair cable - each channel has the positive and negative twisted at a 90 degree to the other. The cables I am talking about are built like this:

- Each channel - positive and negative twisted at a 90 to the other

- Left and Right Channels - twisted at a 90 to the other

- Front and Rear Channels - twisted at a 90 to the other

Your RCA cables are not to blame. For years, installers have struggled with this kind of noise with some makes and models of 4-channel amplifiers. This is a function of the design of the input section of the amplifier. If you have a Loop Area Noise problem, you will only resolve it by using the kind of cable I outline above. Rockford Fosgate offered these in the CPDT series as well.

You can re-ground your amp 'til the cows come home and this will not solve a Loop Area Noise problem.

[One Way]

http://www.audiosavi...per/CTR254.aspx

These are the rcas im running, i know theyre not good quality but they work.

You're part way there. This is s 4ch twisted pair cable - each channel has the positive and negative twisted at a 90 degree to the other. The cables I am talking about are built like this:

- Each channel - positive and negative twisted at a 90 to the other

- Left and Right Channels - twisted at a 90 to the other

- Front and Rear Channels - twisted at a 90 to the other

Your RCA cables are not to blame. For years, installers have struggled with this kind of noise with some makes and models of 4-channel amplifiers. This is a function of the design of the input section of the amplifier. If you have a Loop Area Noise problem, you will only resolve it by using the kind of cable I outline above. Rockford Fosgate offered these in the CPDT series as well.

You can re-ground your amp 'til the cows come home and this will not solve a Loop Area Noise problem.

So is there any company out there that provides these interesting looking rcas?

If not, I know you work with electronics and so forth. Would it be possible for you to make me custom rcas?

[OrzechNJ]

plugg out the the RCA's and check if it makes a noise.. I have the same problem but with all four channels..

Tought that it might be my rca's but it still does the sound when I plug them out..

I was told here that my amp is bad - fortunatelly I still have it on warranty..

[One Way]

I tried that. It only happens on the last two back channels not the front ones.

[OrzechNJ]

I tried that. It only happens on the last two back channels not the front ones.

so prob your amp is bad..

I know it might be stupid but connect ur front speaker to rear and see what happens..

never know.. try all options..

[One Way]

I tried that man trust me. I've isolated the problem to only those back channels, my front channels don't make that noise, my sub amp doesn't either. Next thing I gotta do is switch the ground, but right now I don't have time to do it.

[snafu]

Sorry, this is not something that I could make for you. The VERY first time I encountered this problem was back in 1992 when Linear Power introduced their very first four channel amplifiers. Nothing we tried would resolve the problem, but those types of cables didn't exist back then. They redesigned the input section of the amp and that resolved it. You might scour eBay for a pair of these and get lucky.

You also may be able to solve the problem by using an isolation transformer between the output of the deck and input of the amplifier. Something like THIS.