Now understand that I have no experience using 50 and 100 watt Marshalls at real volume. I play at moderate volumes and previously had my 50 watt plexi amp at 3 at jams at my house. When I gigged it, I had it at 4 and used a pedal for dirt. But now with the UA, I run the amp on 7+. So far the experience has been magic. Part of the magic is the fact that the gain comes on faster than the volume. In other words, if I go into a lead and find I want more dirt and sustain, it comes on very fast and heavy relative to the volume. So just by being a bit careful with pick attack, it's very easy to find the perfect blend for what I feel like playing. Before, any such change to the tone would bring an unacceptable increase in volume. But now, I can ride my volume control almost like a tone control. Maybe this is how it works anyways if you run the amp at 7+. But now I have volumes I can live with. For folks with NMV amps that are just too powerful, this unit is a great solution. I know I probably post too much on this UA but after being so frustrated knowing I was missing out on the joys of my plexi and now having the incredible tone on tap, I feel almost obligated to spead the news. And to really qualify, I have NO experience with any other kind of attenuator. But I think I know tone and THIS is tone.