I started using two amps after my friend Dave Haskell would use my 1965 Fender twin reverb with a 1983 Fender Super Champ
Dave grew up with Robin Ford and invented fusion guitar in 1971 so I'm told
So since 1984 I have gigged with two amps the first time I got close to Jimmi Hendrix sound was with 3 Trainwreck Express amps
not Marshall's later on Paul Allen let me open up Hendrix's Marshall's they were modified same with the EVH 1968 Super Lead 100
33K mid shift resistor and 50K treble pot most Super Lead 100 amps use a 56K and a 25K treble pot Super Bass 47K
next Dumble used a 250K 2-35 CTS Fender treble pot custom made for Fender that's why most clones don't sound correct
I switched to combo amps in 2010 due to transport