B.K Butler Tube Works Blue Tube II: these Butler designed preamps are criminally underrated.( I've decided to stick with the Real Tube.) 2 channels that can be used independently and combined via front panel or footswitch. Channel A sounds sweet and clean. Smooth Fender tonestack. Channel B is where the overdrive resides. Sounds great. Can be played A, B, or A+B. Multiple I/O with options for A, B, or A+B effects loops +. Comes with a 2 button footswitch. Cord missing ground leg post. $220 shipped. I'm open to trades, but I'll be picky. Mostly interested in Peavey basses. P/J setup basses. Synth stuff.