Maxon ST-9 Pro+ Super Tube

The Low Boost switch is the ST-9’s secret weapon – This unassuming switch completely changes the character of the pedal, adding beefy low end and increased saturation via a LP filter and an alternate set of clipping diodes. If this wasn’t enough, the ST-9 also offers 9- or 18-volt operation via an internal charge pump. Run at 9 for the classic 808 sound and feel or switch to 18 for increased headroom, improved dynamics, and a bigger, chunkier tone to the overdrive. From bluesy overdrive to diabolical dirt box, the ST-9 is a devilishly diverse pedal that can punish a clean amp or turn a dirty amp into a wall of doom.

Features
Updated Reissue of 1980’s Super Tube Screamer
Circuit Based on classic OD-9/OD808
Dedicated Midrange knob to dial in amount of mid boost
Low Boost Switch adds low end punch – great for single coils
9-volt or 18-volt regulated operation (switchable)
True Bypass Switching