I picked up this amp brand from a guy that never turned it on. I wante the amp to drive my tweeters on my RBH SI 770/R. My main receiver is the monster Pioneer VSX-59txi. The receiver is putting out 180 watts, but the tweeters on the RBH are new reference amt style tweeters. They are very efficient They sound marvelous when listening to two channel music. It’s a great addition to my theater and with the 100 bucks

Non that I can see so far.

Very good sounding amp warm tight bass
Very strong surprisingly for the light weight it has