FYI from a fellow 65 RI Twin owner I bought a 65 Ri Twin 5 years or so ago and struggled with it for a while because of the power issue. I did a ton of research on Hot Plates, power reducers, installing a 1/2 power switch. I'm still looking into the switch. The thing is the speakers can handle anything from 4ohms to 16ohms so I simply pulled the two outside power tubes. The power attuater guys don't want you to know this. I happen to be an electrocs tech. This dropped the amp to somewhere around 40 watts and now it sounds brilliant at 3. It has the warmth that I used to not get unless I put it at 7 which, as you probably know will make your ears bleed. I have been running it this way for almost 2 years with no problem. I've also heard you can wire the speakers in series if you get speaker buzz but I have'nt had that issue. After reading all the stuff about the DR and the Twin I thought I'd put my 2 cents in. This is for all of us that love the Twin sound but don't want to break the windows at home practicing. I was on the verge of selling it when I tried this and now I wouldn't give it up. I two paid $1150 out the door and am surprised by the new $1800 price tag. Anyway good luck.