Well, I'd planned on mounting my 200 watt Pioneer amp under the back seat but, last month, when I lifted the bottom cushion, I discovered there's NO SPACE under a Finnie's back seat! The back floor is raised up and the cushion sits right on it.
An alternative was to mount the amp under one of the front seats, but with the speakers already there, I was worried about feedback. Or in the trunk, where I'd need more wiring, a coaxial extension cable and have to look at the big gaudy thing every time I went back there.
Problem solved (Finally!) 2 weeks ago, a friend gave me a used 100 watt amp out of his, recently sold, '75 BMW 30Si He'd had it disconncted and didn' know if it was any good. Well IT WORKS! It's 1/3 the size of the Pioneer and fits easily behind the dash, above the hood release and handbrake.
It's an Urban Technologies (or Urban something) Anyone ever heard of them?

Everything is nicely hidden except for the Sony Walkman which sits in the center tray between the front seats. It's kind of a modular setup. Why rip out a whole system when something new comes along? I can connect to the headphone jack on a Walkman, CD, Minidisc, MP3, Sattelite Radio or whatever format comes along to obsolete the previous one. When I'm not using the music player, it can hide in the glovebox or go in the house.

I played the new system for about 5 hours this weekend. It sounded fine with no blown channels, speakers or fuses.

Happy Motoring, Mark

P.S. Anyone want to buy a 200 watt Pioneer amp, almost new, barely used, with box and papers?

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DrDKW