Oliver: I own one with ‘red knobs’ in mint (exceptional) condition. Will you be interested? I want only $700 for it. It has the original pedal, user manual and cover. In my opinion, this is one of the best Fender made amplifiers ever. It is underrated by persons who never used them. But, it is heavy!…
Please contact me if you have an interest in this amp.

Any one know what resistor is needed to replace the big carbon one next to where the power cord enters ? Nothing marked on the one in mine

I’ve had a red knob twin for many years after trying out a borrowed unit. Yes, pulling out 2 tubes and using the low power setting is necessary if you’re not performing at Boston Gardens. Very versatile, quality amp. Reverb is outstanding as is the flexibility of the gain channel which will give you lots of mids and highs if you want them. There is one slight circuit difference in the clean channel compared to Black Face twins. The Red Knob has pre-boosted mids. You can defeat that by pulling the Mid knob out, then the channel matches a Black Face twin. I don’t like the boosted mid so I’m going to remove it from the circuit board and put other circuit modification that will be switched on by pulling the Mid knob.

Just got the black knob. The trick is to put a Sonic Stomp in the effects loop to adjust the tone of the second channel for more bass. Use an Xotic BB preamp pedal for drive with the gain turned down and get a good crunch sound out of that channel.

I love this amp as much as the next guy. it sounds great. it blows eardrums. tone breaks up nicely . I must sell tho as im getting older and find myself not booking gigs because i dont want to lug this thing around. if anyone is looking, mine is in good working condition. i paid $550 a couple years ago. id let it go for $500 obo. Kind of hard to find.