 My experience with Dual has been limited to their TT's which are generally well regarded. My guess is that if this is a Class A amp it will do okay I am just not sure I'd pay top dollar for as compared to other other amps such as Adcom, Hafler etc. I tried a web search for Dual amps and really could not come up with anything. Looking at your photo I searched for Audiophile Concept and got some hits for a couple of tuners and TT's that seem to date from the late 00's. My guess is that Dual must have tried to branch out with a mid to hi-fi line and this is an amp from that attempt. Maybe your seller can provide more info but the the lack of finding anything out there usually means 0 things; it is a extremely rare piece that not enough people owned or it was not a very good product and it faded into oblivion. Perhaps someone else here may know of it. 