Bryston 4Be power amp. The "Be" was the first of the new NRB series of amps before Bryston changed the name to NRB. The "e" in "4Be" stands for Engineering. Note that this is a rare professional model with XLR and 1/4" TRS style connectors. 800w bridge mono @ 8ohm, 400w per channel stereo @ 4ohm, or 250w per channel @ 8ohm. Some cosmetic wear, but built like a tank. Quiet operation, and a nice exciting sound. Great amp for any main monitor system.