Well, is he "so wrong"? I mean, from what's been said, neither 10mV or 100mV is optimum. Granted, on the face of it 10mV is 'more wrong' than 100mV, but it seems the latter is not a great choice either. Dunno. I think there's more mileage in this thread yet. So, any ideas why Pioneer specified 100mV if, as has been said, it causes needlessly higher running temperatures? Surely this 'high' figure of 100mV has been quoted for a reason? Or do you think it is simply a case of it being 'not quite right although it works' when in actual fact something like 70mV is technically a better value? What's going on?!