Yesterday I picked up an ART Tube MP for $25. I was going to use it for recording when I realized that it could be plugged into the effects return on my Workingman's 10. All I can say is that it has never sounded as warm, deep and smooth. I A/B'd it with and without and no amount of knob turning can equal the killer sound it now makes. I recommend it highly to soup up your little bass rig.