If he has another set of speaker outs, he could run a set of outdoor speakers into the garage and get killer music from the real deal. I did this once, with spa, even ran a cheap pot from radio shack and had volume control at the spa. It was pretty cool.
Cheap system for garage
A friend of mine asked me to recommend a system to place in his garage. The space is uninsulated and located in the New York metropolitan region. He will be listening to CD's while working in the garage. I thought that what really makes most sense is for him to get a $200 boombox rather than spend any kind of real money on components that may not tolerate temperature swings. Any other ideas? Can anyone recommend a decent boombox?