I'd say transistor amps still perform slightly better when warm. Electronic devices still rely on chemical components, whose performance depend on a temperature range (which can be found in the specs, i.e. "operating range 0°C - 40°C").
But you can crank the volume up straight after turning on, I mean there is no risk of damage unless specified. It will get warmer quicker at least !
But you can crank the volume up straight after turning on, I mean there is no risk of damage unless specified. It will get warmer quicker at least !