Here's what I want. A car head unit that doesn't have a tape or CD player,
and is just a basic receiver with a line-in port. I just want something to
power the speakers, and to have the ability to plug in a portable
CD/tape/MP3/whatever player into it. Heck, it doesn't even need a receiver,
because I could plug in a radio too.
I can't seem to find anything like this, has it existed? How hard would it
be to build something like this?

Thanks.

--Peter