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Mark IIb HELP!!!!

Posted: Wed Nov 29, 2017 1:34 pm
by John_not_Pet
Mine is the 60 watt, graphic eq, fx loop, reverb, presence, etc.

1: Which tubes yall like? And do they require biasing?
2: What are the jacks on the bottom side of the chassis for?

Re: Mark IIb HELP!!!!

Posted: Fri Dec 01, 2017 5:11 am
by treedroppings
I think a matched pair of mesa-branded str 440 tubes will do fine, my boogie mark 1 reissue does fine with ordinary mesa tubes in the power section. no biasing required as long as long as you use mesa boogie 6l6 tubes or tubes from a boutique supplier like or that kn ows and tests for mesa boogie specs

Re: Mark IIb HELP!!!!

Posted: Thu Mar 01, 2018 11:08 pm
by Road Hat
Based on the knob labeled Post FX indicates that it’s a iib+, with the + indicating that it’s had the factory mod. The bottom inputs are for reverb/EQ or boost/EQ, not sure how to tell how it’s wired. Mine is boost/eq, as I keep the reverb on all the time. Great feature!