The FMJ line from Arcam is their top of the line products, which feature class 'G' which are much more efficient than class 'A/B'. The Arcam A39 here acts as class 'A' for the first twenty watts! I had planned, dreamed of using it with a pair of Zu's or Tektons, but my man cave morphed into a stupid storage room and junk room, so I can't get the speakers and this has to go. Please check review from What-Hifi and a few others... Listed as 8/10 because of age only, no big scratches or dings. I left the little plastic tab covering the A39 on the front of unit.