Folks ask me about how to make a 100 watt amp less loud. They want the amp  “singing”  but they need to have the output valves starting to clip and this means LOUD. Usually they are amps with outputs north of 60 watts. Exceptions are Vox AC30’s which are 30 watts.  The discussion here is focused on amps that four or more output valves. First thing to keep in mind is that a 100 watt