Hi there,

I have an american innovatek head unit which plays mp3s dvds etc etc.

Anyway, the problem i'm having is that I have the RCA's of the head unit
connected to an alpine 3542 amp which is then connected to two infinity
6x9s. When I start the car I can hear a whining noise coming from the 6x9's,
when I rev the engine, the whining gets higher pitched.

My RCA's run down the right side of the car and the power cables down the
left.

I took the stereo out and connected it to a power supply in the boot and
connected 1 metre rca's to the amp and still there was a whining even when
the stereo was off.

Anyone have any ideas what this could be and how I could fix it?

My RCA is supposed to be a high quality RCA, should I buy the best RCA money
can buy? Would this solve the problem though?

Any help would be really appreciated.


Thanks in advance

In article ,
says...
Hi there,

I have an american innovatek head unit which plays mp3s dvds etc etc.

Anyway, the problem i'm having is that I have the RCA's of the head unit
connected to an alpine 3542 amp which is then connected to two infinity
6x9s. When I start the car I can hear a whining noise coming from the 6x9's,
when I rev the engine, the whining gets higher pitched.

My RCA's run down the right side of the car and the power cables down the
left.

I took the stereo out and connected it to a power supply in the boot and
connected 1 metre rca's to the amp and still there was a whining even when
the stereo was off.

Anyone have any ideas what this could be and how I could fix it?

My RCA is supposed to be a high quality RCA, should I buy the best RCA money
can buy? Would this solve the problem though?

Any help would be really appreciated.


Thanks in advance



Not sure of the exact cure, but it sounds like a ground loop issue.
--
The poster formerly known as Skodapilot.
http://www.bouncing-czechs.com

MeatballTurbo wrote:


When I start the car I can hear a whining noise coming from the
6x9's, when I rev the engine, the whining gets higher pitched.

Not sure of the exact cure, but it sounds like a ground loop issue.

Indeed - I had the same problem once, and fitting a ground loop isolator
into the RCA leads sorted it out.

Take a look at http://www.maplin.co.uk/, item VW43W. That should sort it
out. I believe Halfords sell one too.

Cheers

Dave P


--
David Precious
http://www.preshweb.co.uk/

In article ,
says...
MeatballTurbo wrote:


When I start the car I can hear a whining noise coming from the
6x9's, when I rev the engine, the whining gets higher pitched.

Not sure of the exact cure, but it sounds like a ground loop issue.

Indeed - I had the same problem once, and fitting a ground loop isolator
into the RCA leads sorted it out.

Take a look at http://www.maplin.co.uk/, item VW43W. That should sort it
out. I believe Halfords sell one too.

Cheers

Dave P



sometimes a ground loop isolator will take some of the edge out of the
sound quality too though.

Grounding the case of the Amp to the car body properly can help to,
without losing any sound qulaity when grounded.
--
The poster formerly known as Skodapilot.
http://www.bouncing-czechs.com