I also ended up with a Joule-Electra preamp and Spectron monoblock amps. Best sound in my system of what I have tried. Pass amps were on my short list to try until I figured out how much heat they give off. I live in Texas and heat is a real issue. In August when I had my tube monoblocks I did not play them. My AC could not keep my house cool with the tube amps running.