I was trying out different things for my fuzz box tinkering and pulled out an old ART Tube MP mic preamp. Slaved into the effects loop, it offers a fairly neutral platform for voicing pedals and a super-clean clean. It also has a boost switch, so an op amp overdrive sound is available. I thought it was cool as something to goof around with and it, surprisingly, didn't sound bad. My graphic EQ offered some tonal control.
I also tried it with my ancient Harmony H400a. However, that amp can't be pushed hard and I browned out the power tube. Up to the point of finding it's limit, it sounded pretty cool.
If someone needed an incredibly light, portable, or temporary setup, a $70 ($30 used) ART MP, a power amp, and a couple of pedals could go pretty far. I thought I'd pass it along as an idea for a backup or as an alternative for fuzz/distortion pedals. Also, it has XLR out and can go straight to a PA, but a tube power amp would sound warmer.
2007 3 Channel Dual Recto w/loop mod
My Humble Music Tech Blog: Dual Rectifier Index