ST-9 Pro+ Supertube

The ST-9 Pro+ Supertube by Maxon is a versatile overdrive pedal designed to deliver powerful and responsive distortion tones. It is an updated reissue of the 1980s Super Tube Screamer, based on the classic OD-9/OD808 circuit. The pedal features a dedicated Midrange knob to control the amount of mid boost, providing heavy, thick, and powerful distortion sounds similar to a full-stack amplifier.

Key Features:
- Loosely based on Maxon's classic “808” circuit
- Dedicated Midrange knob for controlling the amount of midrange boost
- Low Boost switch for adding low-end punch, suitable for single coils
- Switchable 9V or 18V operation for increased dynamic headroom and fuller frequency response
- True Bypass Switching for preserving the integrity of the guitar signal
- Mechanical True Bypass switching via a Fujisoku 4PDT switch
- Internal charge pump for voltage conversion from 9V to 18V
- Input Impedance: 500K Ohms
- Output Impedance: 10K Ohms or less
- Maximum Gain: 51dB (2.2 kHz)
- Equivalent Input Noise: -115dB or less (IHF-A)

Technical Specifications:
- Power Consumption: 12mA/9VDC, 36mA/18VDC
- Dimensions: 74 (W) x 124 (D) x 54 (H) mm
- Weight: 610g (including battery, excluding AC adaptor)
- Power Supply: 6F22 / 6LR6 9V battery x 1 or Maxon AC adaptor
- Standard Accessory: AC adaptor AC2009, user's guide
- Battery life: 9VDC manganese battery 26 hours @ 25 degrees C, 9VDC alkaline battery 48 hours @ 25 degrees C, 18VDC manganese battery 2 hours @ 25 degrees C, 18VDC alkaline battery 8 hours @ 25 degrees C