I just bought a Yamaha HTR-5660 receiver, and after getting it set up last night, I've come to realize that I'm unfamiliar with the volume control. The Yamaha is the best receiver I've owned yet (that's not saying much), and I noticed the volume control goes from -90dB to 0dB. The lower end might be lower than -90, but that's probably not important to my question. My older, presumably worse receivers had the volume scale starting from 0, going up to various numbers. My last unit, an AIWA 5.1, went from 0-20's for example. Anyways, I was expecting the Yammy to have an easier time driving my speakers, since it's several years newer, has higher current amps, etc. But I can't really evaluate whether it drives my speakers better because I'm not used to the dB scale. With my old AIWA, if I wanted nice loud listening volumes for action movies, I'd have to turn it up to the low 20's, and the volume indicator would blink (I think this meant that it was using all its power). With the Yammy, on most input sources it seems I can't hear *anything* until the volume is around -60dB or so. It's plenty loud around -35dB, meaning I usually wouldn't want it any louder. Does this suggest that I have a significant untapped amount of power left over -- from -35dB to 0dB? If this is the case, then it's pretty clear the Yam is stronger than the old AIWA. On a related note, I'm shopping for new speakers to replace my current crappy set. I'm interested in Aperion and a couple of others. My concern is that some of the harder-to-drive speakers (like Aperion, for example) might be too much for my Yam's amps. Any insight on this? Am I worrying too much? I posted a similar question in the Speaker forum that went unanswered. Any responses will be greatly appreciated!