Normal 0 false false false EN-US X-NONE X-NONE For sale is the wonderful NAD Master Series M15 Preamplifier/Surround Sound Processor. Physically, this unit is in very good to excellent condition. There are no scratches or blemishes. The bad news is that the unit does not work. It will not output any sound through the preamp outputs. There is no sound from the analog inputs. The digital inputs seem to work in that they will lock on to an incoming digital signal, but again no output. Only the 7.1 channel direct inputs will produce sound at the outputs but it is heavily distorted, as though the input is being overloaded. It has a ton of features and connections including two HDMI inputs and one HDMI out. 3 component video ins and 2 outs. On the audio side, which is all I ever used, it has more than enough analog inputs including a 7.1 channel direct input, along with 7.2 channels of analog audio output. It also has 4 coaxial and 4 optical digital inputs and 2 coaxial and 2 optical digital outputs. This is a very versatile preamplifier. The Master Series components are the best that NAD offers so sound quality is excellent. Functionally everything else seems to work as it should, including the remote control. This is a solid and heavy unit. Well worth getting repaired. We do not have the original packaging but this will be very well packed for safe shipping. New price for this was $3000 USD.