I was under the impression that some watts were wasted if one had to crank up the volume before hearing something.That would be true if the combination of amp gain, preamp gain (if there is a separate preamp, although of course there wouldn’t usually be one in the case of an integrated amp such as this one), and source output voltage is insufficient to drive the amp to its maximum power capability even with the volume control at max.
That can happen in some situations, and in fact I’ve been discussing just such a situation in a recent thread which involved the possibility of using a Herron phono stage to drive a certain power amp via a passive preamp which provides no gain. But that would be a fairly unusual set of circumstances.
Best regards,
-- Al