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Electro Harmonix B9 Organ Machine

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Description

Essential Information About the Electro-Harmonix B9 Organ Machine Pedal

  • 9 organ presets inspired by iconic sounds from the '60s and beyond, to instantly transform a guitar or keyboard
  • Control of the percussive "click" (tonewheel organ-style attack) and dedicated modulation for each preset (vibrato, tremolo, or chorus depending on the sound)
  • Ultra-musical dry/organ mix + dual output to separately route the guitar and organ signals
  • Power supply included and buffered bypass, designed for easy integration on a pedalboard

An "organ machine" that has become a classic for capturing the spirit of vintage keyboards

The B9 Organ Machine follows in the footsteps of Electro-Harmonix pedals that provide access to "instrumental" textures without using a synth or MIDI system. Here, the idea is clear: to recapture the tone and presence of legendary electric organs, with that small detail that makes all the difference-the famous key click (the typical percussion/attack) and a modulation tailored to the character of each preset. The result: you switch from a guitar rhythm to a convincing organ pad with a single switch, perfect for thickening a trio, replacing a keyboard part, or creating layers in the studio.

Who is it for, what styles, and in what contexts?

The B9 is aimed at guitarists and keyboardists who want to thicken an arrangement without adding a second instrument on stage. It is ideal for rock (power trios, classic rock, indie), blues and soul (organ-style comping), gospel, but also in ambient or cinematic contexts whenever layers are stacked with delay and reverb after the pedal.

Live, it works wonders when you need to fill the space between bass and drums or double a chorus with an organ texture. In the studio, it becomes a quick sound design tool: you record a clean guitar take, then sculpt the attack level and modulation to make it "speak" like a real organ. Among users spotted on pedalboards are The Edge, Gary Clark Jr., and Josh Klinghoffer, proving that this "pedal" format can become a true production and stage tool.

Controls, routing, and key points to know

The interface is immediate: a preset selector to choose the organ, then four controls to tailor the result to your playing. The DRY / ORGAN mix allows you either to fully replace your original sound or create very effective overlays (guitar + organ) in a mix. The CLICK knob adjusts the level of the percussive attack, useful for shifting from a softer organ to a very "snappy" and rhythmic organ. The MOD knob controls the speed (and depending on the preset, the type) of modulation, ranging from subtle movement to a more pronounced effect.

Regarding connectivity, the B9 offers an ORGAN OUTPUT that delivers the mix set by DRY and ORGAN, and a DRY OUTPUT that sends your input signal directly, handy for advanced setups: for example, sending the organ to a dedicated chain (chorus/rotary/delay/reverb) while keeping the guitar going to the main amp. Note: the footswitch activates a buffered bypass and the DRY output remains available, which can simplify certain stage routings.

Integration tip: for cleaner tracking and better responsiveness, place the B9 at the start of the chain (before most effects), then add your modulations, delays, and reverbs afterward. Like any tracking effect, it appreciates clean playing and well-defined notes; a light compressor can also help even out the attack if needed.

The sound

The B9 does not just "imitate an organ": it aims for that sense of body and sustain associated with vintage keyboards, while maintaining a pleasant dynamic response under the fingers. The sound can range from a warm, rounded organ perfect for chord stabs to brighter textures with emphasized percussion to lock in the rhythm. The built-in modulation adds the essential movement (vibrato/tremolo/chorus depending on the preset) and quickly gives it the feel of a "full-fledged instrument." In dry/organ mix mode, you get very inspiring hybrid sounds: guitar attack + organ sustain, ideal for melodic lines that remain clear while filling the space.

Technical Specifications

Effect type and presets

  • Organ simulation pedal for guitar or keyboard
  • 9 presets: Fat & Full, Jazz, Gospel, Classic Rock, Bottom End, Octaves, Cathedral, Continental, Bell Organ

Controls and commands

  • Potentiometers: Dry Volume, Organ Volume, Mod (modulation speed), Click (percussive attack level)
  • Selector: Preset
  • Footswitch: Bypass
  • Status LED

Bypass and impedances

  • Bypass: buffered
  • Input impedance: 1M ohm
  • Output impedance: 500 ohm

Connectivity

  • Input: 6.35mm TS jack (unbalanced)
  • Outputs: 6.35mm TS jack (unbalanced) (Dry Output), 6.35mm TS jack (unbalanced) (Organ Output)
  • Dry Output: direct signal available independently of effect/bypass mode

Format

  • Dimensions: 10.2 x 12.1 x 5.7 cm
  • Reference: OPC2511M10

Included accessories

  • Power adapter included
  • Documentation

Power consumption

  • Required power supply: 9V DC (center negative)
  • Consumption: 100 mA
Brand reference number: EHXB9

Testimony

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very useful in a group including two guitarists and no keyboardist
Verified
Posted on 15/06/2022
By CHEREGI Aurelian
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not so easy to master, but by dosing each button well we get something nice A bit expensive when
Certified
Posted on 13/12/2014
By Bernard P.

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