The Eventide Clock Works H910 Harmonizer is an Eventide effects unit. Close alternatives include the Eventide H9 Max Harmonizer Multi-Effects Pedal and the Eventide Eclipse. It pairs well with the Mesa/Boogie JP-2C John Petrucci Signature 60/100-Watt and the Marshall Studio JCM900 SN20H.

Eventide Clock Works H910 Harmonizer

Eventide · effects unit

The Eventide H910 Harmonizer, released in 1975, was the first commercially available digital pitch shifter, letting engineers and players alter pitch in real time without changing playback speed, a capability that had previously required tape manipulation. It became a studio fixture through the late 1970s and 80s for doubling and pitch-shifted effects on vocals and guitars alike. Eddie Van Halen has been associated with early digital effects units of this kind as part of his exploration of studio processing beyond conventional guitar pedals.

What stands out

  • “The Eventide H910 Harmonizer, released in 1975, was the first commercially available digital pitch shifter, letting engineers and players alter pitch in real time , a capability that had previously required ta…”

    — from the listing

  • “[Equipboard Review] Blast from the past: Eventide Clock Works H910 | MusicRadar The Eventide Clock Works H910 Harmonizer is celebrated for its pioneering role in digital pitchshifting”

    — from the reviews

  • “Eddie Van Halen has been associated with early digital effects units of this kind as part of his exploration of studio processing beyond conventional guitar pedals”

    — from the listing

  • “It became a studio fixture through the late 1970s and 80s for doubling and pitch-shifted effects on vocals and guitars alike”

    — from the listing

  • “Although its features seem modest by modern standards, the H910's distinct 'glitchy' artifacts are now considered a desirable trait”

    — from the reviews

  • harmonizer
  • digital
  • studio
  • pitch shifter
  • pitch
  • vocal
  • glitchy
  • digital pitchshifting

Amps that pair well with the Eventide Clock Works H910 Harmonizer

Mesa/Boogie JP-2C John Petrucci Signature 60/100-Watt

Mesa Boogie

tonal match

Put Mesa/Boogie JP-2C John Petrucci Signature 60/100-Watt in front and the mid-forward tone leans further toward high gain

Marshall Studio JCM900 SN20H

Marshall

tonal match

Run mid-forward into Marshall Studio JCM900 SN20H for more high gain on top

Friedman BE-Mini Head

Friedman

tonal match
$196.01via Reverb

Friedman BE-Mini Head stacks high gain on top of the mid-forward already here

Hughes & Kettner Warp 7

Hughes & Kettner

tonal match

Hughes & Kettner Warp 7 stacks high gain on top of the mid-forward already here

Egnater Tourmaster Combo 4212

Egnater

tonal match
$380via Reverb

Put Egnater Tourmaster Combo 4212 in front and the mid-forward tone leans further toward high gain

Hughes & Kettner Coreblade

Hughes & Kettner

tonal match

Run mid-forward into Hughes & Kettner Coreblade for more high gain on top

Synergy Friedman DS Module

Synergy

tonal match
$399.99via Reverb

Synergy Friedman DS Module stacks high gain on top of the mid-forward already here

Engl Victor Smolski Limited Edition

Engl

tonal match
$1569.04via Reverb

Engl Victor Smolski Limited Edition stacks high gain on top of the mid-forward already here

Pedals that stack with the Eventide Clock Works H910 Harmonizer

Death By Audio Destruction

Death By Audio

tonal match
$137.70via Reverb

Run mid-forward into Death By Audio Destruction for more fuzzy on top

Dr. Scientist Frazz Dazzler V2

Dr Scientist

tonal match
$203.84via Reverb

Dr. Scientist Frazz Dazzler V2 stacks fuzzy on top of the mid-forward already here

Subdecay F-Bomb

Subdecay

tonal match
$229.95via Reverb

Put Subdecay F-Bomb in front and the mid-forward tone leans further toward fuzzy

Warm Audio Jet Phaser

Warm Audio

tonal match
$109.24via Reverb

What Warm Audio Jet Phaser brings here leans toward shimmer — that's worth building a pairing around

Boss IR-2 Amp

Boss

tonal match
$131.99via Reverb

Boss IR-2 Amp stacks high gain on top of the mid-forward already here

Citadel Particle Drive preamp

Citadel

tonal match

Run mid-forward into Citadel Particle Drive preamp for more high gain on top

Friedman Box of Doom Distortion

Friedman

tonal match

Friedman Box of Doom Distortion layers high gain onto an already mid-forward signal

Ibanez SM Mini Super Metal Distortion

Ibanez

tonal match

Ibanez SM Mini Super Metal Distortion stacks high gain on top of the mid-forward already here

Alternatives

Eventide H9 Max Harmonizer Multi-Effects Pedal

Eventide

48% similarity

Shared character: digital, studio

Eventide Eclipse

Eventide

47% similarity

Shared character: studio

Digitech IPS-33B Super Harmony Machine

Digitech

46% similarity

Shared character: pitch modulation, studio

Neural DSP Archetype: Tim Henson

Neural Dsp

88% similarity

similar tone character

See all alternatives to the Eventide Clock Works H910 Harmonizer (cheaper + boutique) →

Questions people ask

What are good alternatives to the Eventide Clock Works H910 Harmonizer?+

The closest matches in character are the Eventide H9 Max Harmonizer Multi-Effects Pedal, the Eventide Eclipse, the Digitech IPS-33B Super Harmony Machine.

What pairs well with the Eventide Clock Works H910 Harmonizer?+

Strong matches from rig and tone-complementarity evidence: Mesa/Boogie JP-2C John Petrucci Signature 60/100-Watt, Marshall Studio JCM900 SN20H, Friedman BE-Mini Head — Put Mesa/Boogie JP-2C John Petrucci Signature 60/100-Watt in front and the mid-forward tone leans further toward high gain.

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