I played this exact rig for a bit. Great range of tones.
Still have the cab. Sold the head because I never used it after the purchase of the Hartke Kilo and the Genz Steamliner 900.
Pull all the ribbon connecters and clean them prior to running it.
Do a search on the BX 500. Lots of threads.
Dingwall, Fender, Grove, Ric, Reiner Amplification (6SL7 Goodness), Genz, & (BNA Audio) Greenboy Dually & F115.