OD-9 Pro+ Overdrive

The Maxon OD-9 Pro+ Overdrive is a versatile pedal designed for guitarists seeking high-quality overdrive effects. Here are the technical specifications and features:

- Overdrive based on classic OD-9 circuit
- Switchable 9- or 18-volt operation (runs on 9 VDC)
- More Gain and Low-End in 18-volt setting
- Mid Boost Switch adds +3 dB @ 800 Hz
- NJM4558 (JRC) Op Amp
- True Bypass Switching
- Input Impedance: 500K Ohms
- Output Impedance: 10K Ohms or less
- Equivalent Input Noise: -116 dB or less (input shorted IHF-A weighted)
- Maximum Gain: Normal 43 dB (at 1.5 KHz), Boost 46 dB (1 KHz)
- Controls: Drive, Tone, Level, Boost/Normal switch, 9/18 volt operation switch
- Power Supply: 9V Manganese dry cell battery (6F22) or special AC adaptor
- Power Voltage: DC9 V (Battery) / DC10 V (AC-adaptor)
- Current Consumption: 35 mA (9 V) / 32 mA (10 V) at 18 volts, 27 mA (9 V) / 27 mA (10 V) at 9 volts
- Dimensions: 74 mm (W) x 124 mm (D) x 54 mm (H)
- Weight: 580 g
- Accessories: 9V Manganese dry cell battery (S-006P) x 1, Warranty Card x 1, User's Manual x 1

The OD-9 Pro+ offers the flexibility of 9- or 18-volt operation, providing different tonal characteristics and increased headroom. The Mid Boost Switch enhances the pedal's versatility, allowing for a +3 dB midrange boost at approximately 800 Hz, ideal for solos and cutting through a band. The pedal's circuitry incorporates a jFET buffer, Op Amp with clipping diodes, and voltage conversion chip for improved performance.