Wow, thanks for the information, but as I mentioned before, I'll have to stick to the current gain settings, as done by CambsCar, since the amp is in a nightmare place.

I did play around with the gain on the previous car (VW Polo) and found that as I increased the gain on the amp, the noise level increased to an enourmous amount. Guess this kinda proves your point.

Cheers,

Paul

Paul Haigh, 6GB, Blue
Reg: 4120 - Serial 00254
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Paul Haigh, Reg. 4120 (mk1) 6GB, Blue, 00254 (mk2) 12GB, Red, 00357