One knob is all you need if your pedal is any good, right? This is voiced on Dumble amps, the idea being to give you that touch sensitive, slightly compressed, super articulate goodness in a box. Features a footswitch for turning it off or on, but just leave it on would you? Thanks.  :)

Model: Greer Amps Special Request 
Made: Athens GA, USA, recent model
Type: pre-amp/colour
Power: standard 9v negative supply (not included)
Equivalent new street price (approx): $220aud
Mods: velcro added
Accessories: original box and docs
Condition notes: used, no major marks, very good condition