amps are on standby or off when speakers get switched.
The speaker cables are 50' long from the amp to the cabinet, no gadgets, just 12/2 Belden speaker wire
Photo: today's recording of the clean electric guitar (DeArmond) with the STRAMP 4120. I built this amp in 1975 and I found it on eBay 34 years later, still works like a charm. Sounds like a Fender Twin on steroids, it just won't distort