I recently "upgraded" my old JVC RX817 (105W) pro logic receiver to a refurb Pio DD/DTS VSX711 (100W). Fine so far, love the Pio for movies. But, compared to the JVC, it has no "balls" for music. Now, I know not all watts are created equal, but this is a serious difference. Thus my question: The JVC specs list it as a "Dynamic Super A" receiver. It also lists the power to 2 channels at 105W each at 0.007% THD. This seems like an awfully low THD when compared to other, newer, (and much more expensive) receivers. Does this have anything to do with the "dynamic super A" thingie or it that just jvcspeak. I also noted the JVC weighs about 15lbs MORE than the newer PIO - I mean this old thing is a tank! Hmmm...just wondering if this "dynamic super a" is some sort of switching class and if so, how does it work? Any thoughts?