Oceanica, sorry but you can't. My SET monoblocks were designed and built by a friend. I can provide a schematic if you contact me off line, but the builder has moved out of our area and AFAIK has not constructed any more than the 3 pairs he built a couple years ago. I was running Conrad Johnson Premier 12s (140wpc) at the time I first heard them and there was no contest at all. They use Magnequest trannies, 845W output tubes. EL-34 driver tubes (Mullard Xf1's currently in mine,) and 6N7 input tubes (Mullard ECC31's in mine) with solid state rectification. That's three tubes per side. Dave