Re: Sound System
Yes, size of the box is a huge consideration. Home gear that you already own might get the job done in a small inside space like Karl's. (Bose is notoriously inefficient) But get into a big box and home-style gear will let you down.
For sure shop at a place like Guitar Center instead of Mack's Stereo. Go to the pro audio department, tell 'em what your situation is.