This is not a home theatre question but it is an audio one and I'm not sure where else to post it. Apologies if this is the wrong place.
I need to contrive an inexpensive high volume 12-volt PA system for a friend to use in a parade. It has to be mounted on and powered by a quad bike. There are a few commercial options that would do the trick, but they are much too expensive. My thought is to pick up a 100+ watt car stereo amp on Trade Me, bridge it to drive a single speaker, disable any low pass sub-woofer filter, and plug my friend's MP3 player into the line input as an audio source. Can anyone tell me any reason why this might not work, or anything I should watch out for?