Maxon OD9 Pro Plus Overdrive Pedal

The Maxon OD9 Pro Plus Overdrive Pedal may look just like your old favorite, but that's where the similarities end. With improved circuitry, the OD9 overdrive stands at the forefront of the Nine Series effects evolution.The OD9 overdrive pedal uses a signal-distorting diode (Panasonic #MA150) that is located in the amplifier stage's negative feedback loop (this stage also contains the JRC4558 IC chip). Therefore, the OD-9 pedal distorts the signal in the amplifier section itself, which yields a smoother, milder, more natural sounding distortion than a separate clipping stage. This is also the reason that the IC type used in the circuit has such a large impact on the unit's tone. Maxon developed this unique design more than 20 years ago, an industry first that is commonplace today.The OD-9 Pro Plus's new circuit uses different output resistors than its predecessor. After the unit's initial release it was discovered to have a high susceptibility to noise due to static