I've picked up a funky adult trike that could carry a nice sound system. I've a nice car CD player but not a wire to or from it. I day dream about an old car battery, a few speakers, and a fun music filled ride! How do I make it happen, and with only a little $$$ spent along the way? Thanks!
Here's a previous discussion on the matter, perhaps incomplete and/or parallel to yours, but maybe informative as well. Hit the link and scroll down to the bottom of the first page and start from there, the entry labeled "Reply by Lee Diamond on August 7, 2009 at 11:58pm".