986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Pioneer AVIC-F700BT Problem

PaulSeales · 09-09-2008, 02:35 PM

The stock amp has been completely untouched. I removed the Becker, did the mods to the housing and installed the cage for the AVIC.

I bought an audi\porsche ISO adapter from a local store (I was told this would plug in and enable me to use the stock amp) and hooked them together. The HU powers on fine but there is a whine coming from the speakers. When the car is in motion there is a low clicking noise (like it needs a suppressor) which gets worse the faster I go but at standstill is gone.

I disconnected the blue power lead (that turns the amp on) and the whine goes. Plugging it in and the whine is straight there.

Do I need to mod the ground going to the stock amp? Re-ground it to somewhere else in the trunk?

If so - is it still the thick brown wire?

Thanks for the response Steve.

Paul.

09-09-2008, 02:35 PM	#3
PaulSeales Registered User Join Date: Mar 2008 Location: Essex, UK Posts: 12	The stock amp has been completely untouched. I removed the Becker, did the mods to the housing and installed the cage for the AVIC. I bought an audi\porsche ISO adapter from a local store (I was told this would plug in and enable me to use the stock amp) and hooked them together. The HU powers on fine but there is a whine coming from the speakers. When the car is in motion there is a low clicking noise (like it needs a suppressor) which gets worse the faster I go but at standstill is gone. I disconnected the blue power lead (that turns the amp on) and the whine goes. Plugging it in and the whine is straight there. Do I need to mod the ground going to the stock amp? Re-ground it to somewhere else in the trunk? If so - is it still the thick brown wire? Thanks for the response Steve. Paul.