Good lord.  Just in case the SVT is not big/heavy/loud enough for you, Fender swings back with 435 watt PS-400.  I have only seen one of these in my life; can’t recall when/where.  Great fan-site for these amps here…  interesting picks of melted (like, literally) 6550 tubes from some sort of biasing-mishap.  Proceed with caution…

The Fender Precision bass in classic James Jamerson trim.  Who is James Jamerson?  Books have been written…  but you can start here. Kinda invented maybe 25% of the electric bass guitar lexicon?  Rough guess.

The electric bass Jamerson played was a stock 1962 Fender Precision Bass which was dubbed “The Funk Machine.” Jamerson bought it after his first Precision (a gift from fellow bassist Horace “Chili” Ruth) was stolen. It had a three-tone sunburst finish, a tortoise-shell style pickguard, and chrome pickup and bridge covers (the latter containing a piece of foam used to dampen sustain). He typically set its volume and tone knobs on full. This instrument was also stolen, just days before Jamerson’s death in 1983. To date, it has not been found.

(source)