OD-9 Pro+

The Maxon OD-9 Pro+ Overdrive pedal is a versatile and high-performance effects unit designed for guitarists seeking premium overdrive capabilities. The pedal features a range of technical specifications and innovative design elements, making it a valuable addition to any musician's setup.

Key Technical Specifications:
- Overdrive based on classic OD-9
- Switchable 9- or 18-volt operation (runs on 9 VDC)
- More Gain and Low-End (18-volt setting)
- Mid Boost Switch adds +3 dB @ 800 Hz
- NJM4558 (JRC) Op Amp
- True Bypass Switching
- Stabilized DC-DC voltage converter for increased headroom
- Die Cast Zinc Chassis for durability
- Easy-Access, No Tools Battery Compartment
- AC/DC Power Operation
- LED Power/Battery Life Indicator
- Dimensions: 74(W)×124(D)×54(H)mm
- Weight: 580g (including battery)

Functionality and Design:
The OD-9 Pro+ utilizes a signal-distorting diode (Panasonic #MA150) located in the amplifier stage's negative feedback loop, resulting in a smoother, milder, and more natural sounding distortion. The addition of a low-noise NEC uPC4570 OP-Amp in the output stage allows for less compression and a more balanced frequency response. The pedal also features a switchable Boost mode that enhances midrange and overdrive levels, creating a thicker, slightly compressed overdrive tone.

The inclusion of a stabilized DC-DC voltage converter offers a wider dynamic range and increased headroom, with switchable 9- or 18-volt operation providing flexibility in achieving classic OD-9 pedal tone or a newer, full- frequency tone.

The OD-9 Pro+ is built with True Bypass Switching for uncompromised tone in bypass, and its die-cast zinc chassis ensures durability while providing easy switching access. The pedal also includes an easy-access, no-tools battery compartment and an LED power/battery life indicator for user convenience.

Overall, the Maxon OD-9 Pro+ Overdrive pedal combines classic overdrive with modern enhancements, offering guitarists a versatile and reliable tool for achieving a wide range of tones and effects.