Bad Ground?

[Webman33569 10+ year member]

I have a PDX4.100 amp powering the mids in my mustang. Im getting a pretty bad whining noise though. I thought maby the ground on the head unit was bad so i ran a new ground for that and im still having the same issue.

I disconnected to RCA from the amp and i am still getting that noise so that pretty much isolates where the noise is coming from. Could this be caused by a bad ground or what else can cause this?

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[revrider1 5,000+ posts]

U have all ur other connections secure? With butt connectors or something of that nature?

 

[Webman33569 10+ year member]

U have all ur other connections secure? With butt connectors or something of that nature?

All the connectors where?

 

[revrider1 5,000+ posts]

On the HU?

 

[Webman33569 10+ year member]

All the connectors on the h/u are soldered on then has heat shrink tube over it. But taking the h/u totally out of the picture it still wines so i know from that, that the h/u is not the prob.

 

[revrider1 5,000+ posts]

If ur disconnecting the amps signal and it continues then maybe it is on the HU? Unless im not understanding right?

 

[Webman33569 10+ year member]

If ur disconnecting the amps signal and it continues then maybe it is on the HU? Unless im not understanding right?

Sry im prob not explaining it right. I have all my mids ran off the alpine amp and when i power on the amp even if the RCA's are not connected to the amp i get a whining noise from the speakers.

 

[revrider1 5,000+ posts]

Ahh, IC...

 

[nineball 10+ year member]

double check the ground on the amp again. if that is ok then i would suggest sending in the amp for repair or returning it if you can to exchange for another.

 

[bw_audio 10+ year member]

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