Why a Blackface? The Bassman 135 , which happens to be Silverface, is the best of the lot. Let Guitar players worry about Mojo, greasy distortion and such, Bass players need loud and punchy, at least as loud as they can. A Bassman 135 with 2 JBL140 for the deep rumble guy or JBL130 for the snappy punchy one are a force to be reckoned with even today. Of course, playing on the edge of crunch gives Bass natural compression and glorious growl, easy to hear even through a crummy TV or car radio speaker. Old 2x15" big fat cabinets are the way to go with these heads; modern 300/600W 4x10" in general are hard to drive unless you have a large amp (well above 200W, SS very acceptable.) I vividly bremember being crushed against my seat in an underground theatre by a Bassman 135 driving a large "fridge" loaded with 2 x EVM15 L . Glorious grungy and fat sound. And the guy was using a Precision with old style flatwound strings, go figure.