I've got an opportunity to get an SL5 for a good deal ($500), but am wondering about how the WAF (Wife Acceptance Factor) will be related to volume and tone. On my AVT275 amp, I'm able to dial back the volume and keep a similar tone (thus not waking the neighbors or angering the wife). On the SL5 (or other all tube amps in general), it looks like the only way to get some of the nicer tones is to really crank the volume. For instance, in the official Marshall demo video the tester shows the 'clean' channel at volumes from 1 to 10, with little perceived change in actual volume, but a noticeable change in tone. Does this mean its just LOUD and the knob basically changes the tone? Or, is there another way to limit the volume. I do see that it offers 2 wattage levels and there is a noticeable change in volume between the 2. (but its just seems like 2 fixed volumes, so quite limited) I hope the question is clear, lol. I could certainly use some input! Thanks.