It weighs a ton but I remember how good my 335 used to sound through that bass rig. I loved the sound of that thing. It is so heavy though that I just would not be able to carry it these days. I would like to know how it would sound through my BF BTII. That would be an awesome set up.The MKII is an absolute monster for an amp with two power tubes. 90 watts out of that configuration is almost unheard of. The transformers are huge, voltages are high, and some versions have a factory-installed fan to keep everything cool. They are more popular these days with guitarists than bass players because the circuit is practically a clone of the Marshall Plexi.