Amps that pair well with the Mad Professor 1 Overdrive

fills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → warm)

Run Marshall Bluesbreaker after it and the bright edge settles into something more warm

Comes later in the signal chain

Marshall Studio JTM ST20C MkII 20W 1x12 Combo leans toward edge of breakup, and that's a real, usable character to pair with

Comes later in the signal chain