I have recently purchased used V2 840A and am having trouble getting my head round the -db volume control display. On my unit I am not getting a meaningful output until the display is showing at least -50db and find that dependant on source I need to run it at anything between -45 to -35db to achieve a good sound. In my state of KEF Q55 it is not really bad . They can also listen to -54 . I had Dali Ikon 2 and Dynaudio Excite 14 (both compact speakers) , and the volume is very weak at -54, even weaker than the KEF 's . That seems very strange. I know that Ikon 2 need much efect consumption by a little louder, but this is already extrem here on the Dynaudio as well . They can already loud, but i have to turn at 75 % to 85 % up on the controller. This implies that I am using half the available output before getting anything from the speakers, can this be right or is it a characteristic of the class XD design ? It is hooked up to a pair of KEF Q55, Dali Ikon 2 and Dynaudio Excite X14 which my previous Yamaha AX-490 drove without a problem with a useable output from almost the first "crack" of the volume control. I would be grateful to hear what volume levels other owners owners find they are using to gauge if I have a faulty amp or not ! Having said that, when it's cranked up to -35db the sound is awesome, its just that with an output rated at 120 watts into 8 ohms I would have expected it to rattle the windows much earlier in the power curve. All experiences welcome and appreciated.