Hello. any one knows any thing about class D amps. I just might be geting old and behind time. class D dont have the power supply or caps , as the class a-b amps. how can it produce deep bass at low or high volume. also what does the mids and highs sound like. and my last question,did the high end audio companies charges us a bunch of money for these heavy as hell power amps with these huge transformer and caps-vs companies like crown -qsc-yamaha for a long time been selling high power amps that weighs around 20 pounds and sound just as good as high end amps.