Michael --

If the confines of your Jaguar are as restricted as you say, it is highly unlikely that you will be able to install enough speakers (both quantity and size) to require any serious amount of power.

A simple setup (say a single 10" sub, a couple of 6" midrange, and a pair of 4" co-axials with tweeters) can be run with 100 watts or less at a volume level sufficient to cause permanent hearing damage. The better the quality of the amplifier, the louder you can play without distortion.

If you are looking for sound quality, don't fall into the trap that "bigger is better". You don't need kilowatts of power and boxes full of subwoofers to have a great sounding car.

tanstaafl.

"There Ain't No Such Thing As A Free Lunch"