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I have a mark IIB coliseum head with the 60/100 watt switch. However, when I switch it into 60 watt mode it doesn't seem to lose much volume and all 6 of the 6l6s keep their glow. Does anyone know if I can pull out a pair of 6l6s to tame this beast a little? I'm planning on downsizing to a...

Yea its a coliseum alright but it does have the 60/100 switch on the chassis. Its pretty ridiculous how loud this amp is. With the closed back 4x12 with EVs I can't seem to get it past 3 on the 60 watt mode without the bass shaking the foundation of my house. I've never played a triple...

Yea I thought 2500 was a little absurd. I took out the chassis today to get a good look at everything. Its got the usual "MD" written inside the chassis, and the tube slots are marked. The 4 preamps are positron 12ax7s. The 6 power tubes are Mesa 6l6s (yes the STR415s). Then theres a...

How much did mike charge you for all that work? Did you ask for the recap and pot work or did he repair it when he thought it needed it? In what way did the effects loop mod change the leads? (less muddy i hope) Thats a pretty sick tone on the ozzy cd. The cleans on the IIb are amazing...

Yesterday I picked up a 100/60 watt mark IIb without the graphic eq with the date 3/17/81 written inside the chasis. I got a slanted 4 x 12" cab with it that has a plate that says "boogie" across the front loaded with "force" speakers (the guy at gc said he thought it was an old school EV...