On Mon, 22 Sep 2003, Tracey Estevez wrote:

> With the GLI installed the power output from the amp is noticeably lower, in
> that I can barely hear the sound coming from the speakers. With the GLI not
> installed the system is extremely loud (which will extend the period of time
> I need to replace my holey muffler!).

Is this a subwoofer amp?  GLIs have capacitors internally, to couple the
audio while blocking DC.  They won't work well below a certain cutoff
frequency.

> Good suggestion to ground both amp and radio to same point...I'll give
> that a go.

Let me know if it works.  I suspect the problem is the ground potential is
different at your radio than it is at your amp, forcing current to flow
through the shields of your audio cables.  The steel van body isn't the
greatest conductor, and the stock ground points under the dash (which I
assume your radio is connected to) are notoriously poor.

David Brodbeck, N8SRE
'82 Diesel Westfalia
'94 Honda Civic Si