Got one of these today for R500. This is in response to my search for a cheap practice amp for my son. The idea was to get a small portable amp, but at this price I think I'm going to donate it to the school where he gets his lessons. That way the amp is always available, to him and others. Do you guys know anything about the Ross amps? I know it was manufactured in Texas between 1984 and 1992. Are they any good?