Hi Brucew5828, what’s silly is class d really is crap!, I run all pure class A krell Amplification on my main system , I also have a class a/b reciever that will kill any class d , to do that, you need to buy a high powered vintage receiver like the kenwood kr-9600!, trick the whole thing out with elna silimic two, and nichicon kz and fg capacitors, and modify the tuner Board with better op amp, and modify the power Board, among other modification’s, this reciever is duel monaural design, pure 160 watts per channel, and can do 4ohm load speaker’s with even more increased power, btw, my krell is also modified, lol!, it’s the only 700cx out there, done by krell them self’s, so any thing is possible, tricking out a good high power quality reciever is cheaper than spending $12,000.00 on some slow class d amplifier 😎