I've used a Boss volume pedal since the dawn of time. Bung it between preamp and power amp, set the minimum volume knob somewhere sensible, leave some volume in reserve for the end of gig high volume insanity, remember not to trip over it, job done. Handy for those arty fades into a huge mess of reverb too if that's your thing. And it doubles as an expression pedal if you use synths. Money well spent.