The stompbox OD with the great big head.
OD820 OVERDRIVE PRO
The OD-820 was designed to provide a wide range of tube-amp overdrive tones as well as a transparent, hi-gain clean boost. As the name implies, the OD-820 was intended for use by professional guitarists with advanced playing techniques. The OD-820's expressive tone reproduces fingering and picking nuances with haunting precision, making the best use of any guitar or amplifier's character. With a full-frequency response, minimal compression and zero tonal coloration, the OD-820 won't mask a player's performance weaknesses like other overdrives can.
One of the key ingredients to the OD-820's amazing sound lies in its power section. While the OD-820 accepts 9 volts coming in, it then uses a DC-DC voltage converter (#MAX1044) to bump this up to 18 volts. This higher voltage allows for a more accurate, full-frequency reproduction of the input signal than other units can provide. This higher voltage also allows for more balanced powering of the circuit, providing stabilized positive and negative DC voltage to the overdrive, blend, and tone sections of the circuit.
Overdrive and Blend? That's right -- the other secret weapon of the OD-820 lies in it's blending of distorted and non-distorted signal to create its massive tone. The OD-820's Drive knob does double duty, controlling both the amount of gain and the balance between distorted and non-distorted signal. Note that said non-distorted signal rather than dry signal -- because this signal is still processed through the tone section of the OD-820's circuit before reaching the output. So, at the lowest Drive settings only non-distorted signal is sent to the output, providing the OD-820's stunning clean boost tone.
Like the OD808, the OD-820 distorts signal in the amplifier section of the circuit rather than having a separate clipping stage, which provides a smoother, more realistic tube-like overdrive than other methods. The higher voltage supplied to the amplifier section provides slightly more clipping than the OD808 or OD-9. The OD-820 uses only JRC4558 op amps for the warmest overdrive tone possible.
- Greater headroom
- Smooth, warm tone
- True bypass switching
- Drive, tone, and level knobs
Pull 'er on down into overdrive and take your sound way over the limit. Put it in the cart today!
OD820 Overdrive Pro Specifications:
- AC Adaptor: AC120V Output: DC9V/200 mA Center - / Sleeve +)
Amplitude: +16 dB (At 1 KHz)
Controls: Drive, Tone, Level
Current Consumption: 19 mA (10 VDC)
Dimensions: 117 mm (W) x 150 mm (D) x 60 mm (H)
Equivalent Input Noise: 107 dB (VR Max)
Gain: +46 dB (VR max) (at 1 KHz)
Input Impedance: 500K Ohms
Input Jack: 1/4 inch standard phone jack
Maxon: AC210N Adaptor (9VDC/200mA)
Output Jack: 1/4 inch standard phone jack
Output Level: 10K Ohms or less
Power Supply: 9V Manganese dry cell battery (S-006P) or special AC adaptor
Power Voltage: DC9 V (Battery) / DC10 V (AC-adaptor)
Residual Noise: 98 dB (Level, VR Min)
Switch: Normal/Effect (true bypass configuration)
Weight: 500 g