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Electro Harmonix C9

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Description

The Essentials to Know About the Electro-Harmonix C9 Organ Machine Pedal

  • 9 vintage organ and keyboard presets to transform your guitar (or keyboard) into a true texture machine.
  • Immediate controls (Dry, Organ, MOD, CLICK) to shape attack, sustain, brightness, percussion, and modulation depending on the preset.
  • Smart dual output: one dedicated Dry output + one Organ output (Dry/effect mix) to stack layers or split to two amps.
  • Buffered bypass: ideal on pedalboards to preserve the signal, especially with long cables.

From the B9 to the C9: the "Organ Machine" that expands the playground

Following the legacy of the B9, the C9 Organ Machine adopts the same philosophy: achieving credible organ sounds from your instrument without changing your technique or adding a pickup. While the B9 targeted an initial range of "organ" textures, the C9 opens a new chapter, more oriented towards electric organs, vintage keyboards, and iconic colors inspired by classic genres (prog, vintage rock, ambient soundscapes, combo organs, tape-like textures).

The result: a pedal designed for those who want to thicken an arrangement, create organ doubles, or even replace a keyboard on certain parts, all while retaining the feel of guitar playing.

A pedal for creative guitarists, from home studio to stage

The C9 is aimed both at musicians discovering effects and at seasoned guitarists seeking an instant sonic signature. In blues and classic rock, it delivers warm and expressive organ pads. In prog and '70s rock, it offers dense "drawbars" textures with Leslie-type modulation. In ambient and pop, the airier presets allow for creating pads and backgrounds that fill the space without saturating the mix.

On stage, the handling is ultra-fast: choose a preset, adjust the Dry/Organ blend, then tailor MOD and CLICK to the song. In the studio, the dual output becomes formidable for recording a clean dry track while capturing the processed organ, or for processing each signal differently during mixing.

Controls, presets, and routing: simple on the surface, deep in use

The C9 features a 9-position rotary selector and four potentiometers: DRY (volume of the direct signal in the Organ output), ORGAN (effect volume), MOD (modulation speed, can be disabled by setting to zero), and CLICK (percussion and preset-specific parameters). Depending on the chosen sound, modulation can take on chorus or vibrato colors, and the CLICK control can act as an organ "key click," brightness, harmonic adjustment, attack or sustain control, or even an independent level on some presets.

Regarding connectivity, the pedal has a 6.35mm Jack input, a Dry output (buffered input signal, available even when the effect is off), and an Organ output that sends the mix determined by the DRY and ORGAN settings. This routing allows either ultra-simple wiring (Organ output to amp) or more advanced setups (split: Dry to a "guitar" chain, Organ to a "keyboard" chain, dedicated amp, or console).

The footswitch activates a buffered bypass with status LED: perfect for maintaining a clear and stable signal on pedalboards, especially if you use the Dry output as a constant line.

The sound

The C9 stands out with a very immediate "keyboard instrument" feel: chords become rich harmonic blocks, single notes take on an organ character with percussion and movement, and the Dry/Organ blend allows precise control over the guitar's presence in the final sound. It excels at creating layers: a hint of organ under a riff to thicken it, or conversely a dominant organ to mask pick attack and achieve a more "keyboard" texture.

Each preset has its personality: Tone Wheel targets tonewheel-style organs with rotary cabinet movement, Prog and Lord Purple lean towards massive rock-oriented registers, Compact recalls 60's transistor organs, Mello Flutes evokes a very musical "tape" breathiness, and Telstar brings a more singular color, between retro organ and vintage electronic keyboard. The CLICK control then becomes your best ally to refine the "signature": sharper attack, longer sustain, adjusted brightness, or enhanced harmonics.

Technical Specifications

Effect type and processing

  • Pedal type: vintage organ/keyboard (generation and emulation from input signal)
  • Circuit: digital
  • Bypass: buffered

Presets

  • 9 presets: Tone Wheel, Prog, Compact, Shimmer, Lord Purple, Mello Flutes, Blimp, Press Tone, Telstar

Settings and controls

  • Potentiometers: Dry (direct signal volume in Organ output), Organ (effect volume), MOD (modulation speed, disable at zero), CLICK (percussion and preset-dependent parameters)
  • Rotary selector: Preset (1 to 9)
  • Footswitch: Bypass
  • Indicator: LED status

Connectivity

  • Input: 6.35mm Jack
  • Outputs: Dry (buffered direct signal), Organ (Dry/effect mix) via 6.35mm Jack
  • Power input: DC

Impedances

  • Input impedance: 1 MOhm
  • Output impedance: 500 ohms

Dimensions

  • 102 x 121 x 57 mm

Included accessories

  • Power supply EHX 9.6DC-200
  • Documentation

Power consumption

  • Required power: 9 V DC (center negative)
  • Consumption: 100 mA
Brand reference number: EHXC9

Testimony

4,6 /5
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Impeccable tracking, very short latency time which you get used to very quickly, sounds up to the mark. This pedal opens new horizons, both for guitar and bass.
Certified
Posted on 18/04/2015
By Eric O.

Simple use to be evaluated more precisely with usage
Verified
Posted on 10/01/2022
By Alain COLLET
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Great organ pedal,for guitar, fantastic sounds
Certified
Posted on 08/07/2015
By Tim S.

The case is sturdy, and the whole set is of good quality. The power supply is included. The sound is decent and the settings are very simple. Usage requires very flexible playing and quite a bit of practice. Electro-harmonix could have enriched the sound palette by grouping B9 and C9 in the same case. The price would have been justified.
Verified
Posted on 30/12/2022
By M Savi Pierre
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very good product simulating organs shimmer etc. it can sound a bit sharp with an amp so be careful to adjust it well it's different from the roland gr more neutral and cold
Certified
Posted on 10/05/2016
By Laurent C.

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