Hey folks, I am coming to this game late (better late than never!), but I have recently joined the ranks of you Frankenstein mkII owners. I am running them with my Omega Super Alnico HO monitors, which are rated at 97 db, playing in a rather large room (25' wide x open in back, x vaulted ceiling that peaks around 12'). At 8wpc, wow, they sure play loud enough, and I like peaks in the low 90 db range!
Anyways, lots of good info contained here. I am looking for any updates / recommendations on the rectifier tubes that are being used with these amps, with either the EML 300bXLS and Shuguang Black Treasure 300bs, which I have. I like the RCA black plate 6EM7 over the GE gray plate 6EM7s that came with the amp. I have tried the Mullard GZ37 with the EML, but that seemed like a bit too much, and too edgy for me. Now using Sylvania black plate 5U4GBs, and the sound is smoother.
What others work "best" with the EML or BT?