This is a smaller, more manageable version of the absolutely stunning 4 box 833S, but with a more conventional power supply in a very little spared or sacrificed design. Standing a more easily placed 28cm high and weighing 50kg each. The construction quality is incredible. The sound quality sets a towering new standard in this or in any price level. Using the amazing 833 valve in Pure Class A, single ended configuration, they put out an impressive 120 w/Ch. of the most articulate, authoritative and musical sound imaginable, with a stunningly quiet background.