I am lucky enough to own several nice amps, but none of them has a master volume. I have this not exactly rational prejudice against master volume amps, as if they sacrifice tone for the convenience of a master volume knob. Yet I'm always thinking of how could I get the volume lower on my amps, looking at attenuators, etc. Maybe I need to get over my prejudice against master volume amps and take a look at some. I don't know of any other than the Dr. Prescription Jr, which is attractive but pricey. Can anyone recommend some good ones?