I'm not sure if it was intended to be a leave-on distortion. I know when rickyfitts kicks them on, well, you can imagine how 2 - 200 watt amps through 4x12's would sound, not to mention the bassist is loud enough to counter melody, but honestly, if they left them on all the time i wouldn't be as impressed with them. I think they're more for going from clean or light crunch to like REALLY distorted, theres no other way to explain the ridiculous volume boost. a 200 watt head through a 4x12 with vintage 30's should be fine but they've blown a ridiculous ammount of speakers.