Electro-Harmonix Key 9 Electric Piano Machine


Emulates the world’s most coveted electric pianos

Transform your axe into an electric piano!

  • 9 presets
  • Wurlitzer® sounds
  • Rhodes® sounds
  • Flawless tracking
Out of Stock - 01524 410202
Free UK shipping on applicable items
  • Found it cheaper elsewhere? Contact us to see if we can beat their price!
  • Call us for experienced and friendly advice
Safe Checkout


The KEY9 emulates the world’s most coveted electric pianos and more. With 9 presets, you can transform your axe and lay down a cool “Riders on the Storm” style groove or some hot funk ala “What’d I Say!”

Take it from Mike Matthews who says: “You’ll dig the way the KEY9 turns you into a Rhodes Scholar!”

Quick Specs

– Transforms the tone of your guitar or keyboard
– 9 presets that were carefully crafted to emulate classic Wurlitzer® and Rhodes® sounds, plus more
– Presets provide control of the fundamental parameters that help define that instrument’s sound
– Many presets include adjustable modulation such as tremolo, phaser and chorus
– Use it with the B9 and C9 Organ Machines to create your own powerful keyboard rig
– Fast and flawless tracking
– EHX 9.6VDC-200mA power supply included
– Current Draw: 100mA @ 9VDC
– Dimensions in inches: 4.0(w) x 4.75(l) x 2.25(h)
– Dimensions in mm: 102(w) x 121(l) x 58(h)

Wurlitzer is a registered trademark of Gibson/Baldwin.
Rhodes is a registered trademark of Joseph Brandstetter.


Controls the volume of the untreated instrument level at the KEYS OUTPUT jack.


Controls the overall volume of the selected KEYS preset.

See the preset descriptions on the next page for details.


Press the BYPASS Footswitch to toggle the KEY9 between buffered Bypass and Effect mode. The status LED lights when in Effect mode.


DRY outputs the signal present at the INPUT jack through a buffer circuit. The dry signal is outputted regardless if the KEY9 is in Effect or Bypass mode.


KEYS outputs the mix set by the DRY and KEYS controls.


1. DYNAMO – An evocation of the “Dyno My” modified Fender Rhodes electric pianos of the 1970s and 1980s. Ctrl 1 adds bass to the lower strings of your guitar. Ctrl 2 adjusts the “tine” or high-end overtones.
2. WURLI – The classic sound of the Wurlitzer electric piano. Ctrl 1 adjusts tremolo depth. Ctrl 2 sets tremolo speed.
3. SUITCASE – This preset pays tribute to the sound of a Fender Rhodes electric piano routed through a phase shifter. Ctrl 1 adds a bass octave and adjusts the “tine” or high-end overtones. Ctrl 2 sets the phase shifter speed.
4. MALLETS – Here we have the sound of a wood marimba. Ctrl 1 adjusts chorus depth. Ctrl 2 sets chorus speed.
5. EIGHTY EIGHT – This preset emulates a Fender Rhodes 88 electric piano with built-in tremolo. Ctrl 1 adjusts tremolo depth. Ctrl 2 sets tremolo speed.
6. TRI-GLORIOUS – The sound of a Dytronics/Dyno My CS-5 Tri Stereo Chorus. Ctrl 1 adjusts chorus depth. Ctrl 2 sets chorus speed.
7. VIBES – The sound of a metal vibraphone with motorized tremolo. Ctrl 1 adjusts the high pitch attack. Ctrl 2 sets tremolo speed.
8. ORGAN – This preset offers a highly touch-responsive percussive organ. Ctrl 1 adjusts the high frequencies (treble). Ctrl 2 sets the rotating speaker speed.
9. STEEL DRUMS – This preset conveys the metallic sound of a steel drum. Ctrl 1 adjusts chorus depth. Ctrl 2 sets chorus speed.


Please see the enclosed setting sheet for suggestions on how to set the knobs for each preset. A blank user settings page is also included. Photocopy the blank user setting page to keep a record of your preferred sounds. Or, download a PDF of blank settings at https://www.ehx.com/assets/instructions/key9-presets-outlines.pdf.


• Buffered bypass
• Input impedance: 1MOhm
• Output impedance (for both output jacks): 500Ohm
• Current draw: 100mA

All trademarks are the property of their respective owners.


1. The KEY9 is generally best used as the first pedal in an effects chain. Place modulation, delay and reverb effects after the KEY9. The unit will not perform well if placed in the effects loop of a guitar amp.
2. The KEY9 typically performs best using the bridge pickup of a guitar, although some presets do sound good on the neck pickup. If a guitar’s pickup has a weak output, performance can be improved by putting a clean boost or a compressor in front of the KEY9. Avoid placing a distortion or overdrive in front of the KEY9. Placing distortion or overdrive in front of the KEY9 will muddy up the input signal and cause the tracking to be unstable. If overdrive or distortion is desired it’s best to place it after the KEY9.
3. Some guitar amplifiers have an uneven, peaky frequency response that may cause some sounds to be over accentuated. Use a compressor in front of or after the KEY9 to help smooth out this “peakiness.”
4. The KEY9 upper frequency range is limited for sounds such as Vibes or Mallets. This limitation is due to nature of the actual sounds of these percussive-oriented instruments, where harmonics decrease as the note is played increasingly higher. On guitar, the usable range for these sounds goes up to the 15th fret of the high-E string. The harmonics of the attacks are just too high above that and all that is left is the sound’s attack. As a point of reference, think about the top notes on a piano, where just about all you can hear is the attack in the form of hammer noise.
5. The KEY9 tracks great and will follow whatever you play, but sloppy guitar playing will sound like a sloppy electric piano player. The KEY9 will bend notes as you bend them on the guitar. However, electric pianos do not bend, so for a more authentic sound avoid or limit bending.