This power amp sounds great, but does have an intermittent issue. Every 20 seconds or so, it cuts out and makes a popping noise. Cosmetically it's in EXCELLENT physical condition!!! This unit only shows normal signs of being used or racked (especially considering it’s age), with just very light surface scratches here and there; but nothing too major. Overall it is very clean!

We spoke with AB a while ago, and they didn't have any info on it; but they did mention the Four Ten power amp... which is 200w/channel @ 8ohms or 350w/channel @ 4ohms. He assumed the rating of the Eight Ten is 400w/channel @ 8ohms or 700w/channel @ 4ohms. Unfortunately there isn't any info out there on this model, but you can find info on the Four Ten model. It's surprising that even AB doesn't have any archived data.