Amp cuts at half volume and when I try and make a call

[Jacob86 0]

Replaced the RCA's today and now I have a terrible alt whine.  Never had this happen before so Ive been trying to do some research and what the problems could be.  Here's what Ive tried so far.

 

I've disconnected the RCA's and the whine goes away.

 

Plugged a factory wire back up and no whine

 

Disconnected the 4 channel amp from the ground block and grounded it independently at another point.

 

Since theres no whine with the factory speaker am I correct in assuming its nothing behind the head unit i.e. radio antenna, HU ground

 

Any other suggestions?

[pmureika 31]

Did you ever disconnect the rcas while the system was powered up?

[Jacob86 0]

Did you ever disconnect the rcas while the system was powered up?

yes

[shizzzon 461]

This is very bad.

 

Damage to equipment easily happens this way.

[pmureika 31]

Well I tried that to and ended up with a whine. A new head unit fixed it.

[Jacob86 0]

Well crap,  I had no idea 

[pmureika 31]

Well crap,  I had no idea 

You do now.

Edited June 25, 2013 by pmureika

[Jacob86 0]

What would it have damaged amp, speakers, HU?  

[pmureika 31]

HU!

[Jacob86 0]

HU!

Replacing this is way too pricey.   Would it be repairable?

[pmureika 31]

I don't know for me it was cheaper to replace it. Maybe somebody else could be of help.

[pmureika 31]

I don't know for me it was cheaper to replace it. Maybe somebody else could be of help.

You might want to start a new thread about your whine.