I purchased an ART SLA-1 power amp. It's a single space rackmount power amp that puts out 260 watts at 8 ohms bridged. The amp works as its suposed to with the exception of the fact that it has background fuzz that i can't find a way to get rid of. Does anyone else on this forum own an SLA-1? It was designed to power studio monitors, which usually means ultra silent electronics. Anybody have any suggestions?