• H9 Side View - MIDI I/O
Top of Page


The award-winning H9 delivers Eventide's acclaimed sound and can run all of Eventide's stompbox effects.

The H9 multi effects guitar pedal features a simple, one-knob user interface which allows easy effect editing and preset selection. Two onboard footswitches let you change presets, tap tempo, and bypass with your feet during live performance.
While the H9 stompbox is fully controllable via its front panel, a free editor/librarian, H9 Control, can be downloaded to your Mac, PC, or iOS device. Use the H9 Control app for live editing, creating and managing presets, and changing system settings. H9 even connects via Bluetooth to iPods, iPhones and iPads for wireless live control.
Top of Page


  • True analog bypass
  • Real-time MIDI control
  • Power supply included
  • MIDI via DIN and USB
  • Fast accurate tuner included
  • Expression pedal and AUX footswitch input
  • Sync to the beat with tap tempo or MIDI
Top of Page

Compare H9, H9 Core, H9 MAX

All H9 Models feature the same physical specifications as well as the world-renowned Eventide sound. With the H9 Control app, you can customize any H9 with your favorite algorithms from TimeFactor, ModFactor, PitchFactor, and Space. 

H9 Core
H9 Max

H9 Core

Harmonizer for Less Preloaded with pitch and delay effects from the original studio harmonizers.

  • H910/H949
  • 25 Factory presets


Greatest Hits Preloaded with 9 algorithms and 99 presets from the award-winning Eventide stompboxes.

  • H9 Exclusive: UltraTap Delay
  • Space: Shimmer & Hall
  • PitchFactor: Crystals & H910/H949
  • ModFactor: Chorus & Tremolo
  • TimeFactor: Tape Echo & Vintage Delay

H9 Max

Time, Mod, Pitch, Space Preloaded with all effect algorithms and associated presets from the popular Eventide stompboxes.

  • TimeFactor: 9 Delay effects + Looper
  • ModFactor: 10 Modulation effects
  • PitchFactor: 10 Pitch + Delay effects
  • Space: 12 Reverb and Beyond effects
  • UltraTap, Resonator, EQ Compressor and future exclusives.

The H9 Max also includes all future algorithms created for the platform at no additional charge. Interested in making your H9 a Max?


Top of Page

Featured Algo


CrushStation turns your H9 stompbox into an overdrive/distortion command center with controls that drive your tone anywhere from a creamy saturation to a brutal sonic assault with everything in between. Control features include the usual suspects: Drive, Sustain, multi-band EQ. Plus control over features like Sag, Octaves and Grit that take the overdrive effect beyond the norm.

10 CrushStation presets to help show the range of sounds possible:

  1. Fra Diavolo (a spicy metal preset)
  2. Bisque (smooth and creamy)
  3. Sag Harbor (with heavy sag)
  4. Bottom Feeder (chunky, with added low octave)
  5. Jumbo Shrimp (a big little sound)
  6. Scuttle Butter (thick blues)
  7. PunkRock Lobster (lots of trouble)
  8. Steamed in Beer (that amp's gonna blow!)
  9. Crawdaddy (1 1/2 oz. Vodka, 1 splash Soda Water, 5 oz. Lemonade)
  10. Decapod Muff (a "Big" sound)


Click for more information on updating H9 with CrushStation.

Top of Page

Artists Using H9

Andee Blacksugar
Black Sugar Transmission, Peter Murphy
Stephen Carpenter
Albert Hammond Jr.
The Strokes
Julie Slick
Adrian Belew Power Trio
Vernon Reid
Living Colour
Young the Giant
Young the Giant
Annie Clark
St. Vincent
Dave Weiner
Steve Vai
Top of Page


Just want to say that one hesitates on a precipice when one buys Eventide effects. They are clearly premium products with premium prices.  Right now I'm focused on the H9 Max, but have owned several other Eventide stompboxes, and they're fine tools. 

Even better, really strong updates...

—Scott McGrath

Easy you might think but you have to come up with the idea and put it in a stunning and easy to use piece of gear. Now you have the world best effect processor in the palm of your hand... I want to thank you and congratulate the whole Eventide team for creating the most amazing products year...

—Arnd Hendrickx

My work involving teaching music technology to disadvantaged young people aged 11-16 and currently I'm doing a term where I'm teaching them about analog synths and sound design. When I brought in the pedal they didn't know what to think at first but when I plugged in into the Moog and gave them...

—Dwayne Hamilton

Last year, I bought an Axe FX and hated it from the second I unboxed it. It’s probably fine for guys who can hire a tech just to program a guitar processor. I spent so much time fiddling with it, there was less time to rehearse. Trying to program a computer is not making music! The software was...

—Rick Langford
Top of Page

H9 Awards

2015 Hall of Fame: Maximum Gear: Technology
Guitar Player Magazine
Platinum Award for Excellence
Guitar World
Editor's Pick
Guitar Player
Music Instrument Amplification & Effects Technology
Top of Page


Ask Audio
By Rich Tozzoli
"Rich Tozzoli puts the latest Eventide H9 Harmonizer effects processor pedal to the test in this extensive review. Just how good is this multi-effects pedal? Find out in the review." "Occasionally, a product comes along that can be referred to as ‘game changer’. Without hesitation, I feel that Eventides H9 Harmonizer Effects Processor pedal belongs in that category." "A standard guitar chord takes on a life of its own when run through the Space Shimmer... it just sounds so damn good."
By David Bryce
About the only thing the H9 max can’t do is cook dinner, but that’s okay, as you’ll be having so much fun exploring it effect that you’ll forget to eat.
Guitar Interactive magazine
By Tom Quayle
Tom Quayle from Guitar Interactive magazine spends some time with the H9 Max. "All of the 45 algorithms sound stunning with ‘best in class’ sound quality and a pretty much unlimited range of creative options for sculpting unique sounds." Read More
Guitar World
By Chris Gill
Guitar World checks out the "revolutionary" H9 Max in this review by Chris Gill. The fully loaded H9 Max is by far the best bargain in professional- and studio-quality effects ever offered by a stomp box-format effect unit, providing literally hundreds of effects with superb sound. Read more...
Guitar Moderne
By Michael Ross
Michael Ross of Guitar Moderne takes another look at the H9 after he gets his hands on an H9 Max. Exploring things like Reverse delay, Pitch Undulator, Resonator, and the cool Looper, I realized there were many algorithms I might never have considered without the opportunity to spend some serious time with them. Read more...
Best Guitar Effects
By Gabriel Tanaka
Gabriel Tanaka of Best Guitar Effects takes a look at the Eventide H9. With their entry into pedal based effects processing, Eventide went from being a renowned studio recording heavyweight to one of the world leaders in stompbox effects in only a few short years. Now they’re set to revolutionize the way the world thinks about effects all over again with the H9. Read More...
By Bruce G Owens Jr
It is like having the power of Steve Vai, Eddie VanHalen, Jimmy Page and Vernon Reid in the palm of your hand.
Sound on Sound
By Paul White
The latest addition to Eventide's stompbox range has the chameleon-like ability to emulate all of its siblings! The sound quality is impeccable... and the amount of care and thought that must have gone into developing the control app is impressive. Read more...
Vintage Guitar
By Pete Brown
If Hendrix were alive today, he’d toss his Fuzz Face and Octavia out the window and dive into this hip technology headfirst. Think of it as having Eddie Kramer right on your pedalboard.
Pro Audio Review
Plugging in anything—my Tele, Les Paul, Strat, baritone, cigar box guitar, etc...it delivers pure inspiration.
Premier Guitar
By Joe Charupakorn
You could twiddle its knobs for years and still find groundbreaking discoveries to take your music to the next dimension.
Top of Page

H9 Videos

Top of Page

H9 Control

H9 Control is the ultimate tool for optimizing your experience with all the Eventide stompboxes.  Use it to manage preset lists, update firmware, configure an auxilliary switch, listen to demos without hardware, backup your settings and more. H9 Control not only gives you incredible control over parameters and settings, but it encourages you to explore new sonic territory. Fold, spindle and even mutilate your sound and experience what it's like to be inspired by your gear.

H9 Control runs wirelessly via Bluetooth on Windows, Mac and iOS devices and is available for free

Get Started with H9

Adrienne Humblet provides instruction on getting up and running with the Eventide H9 Harmonizer stompbox.

Top of Page

H9 Videos

  • https://www.youtube-nocookie.com/embed/UuYTaBJDDGk?rel=0
    Eventide CrushStation Official Release Video
  • https://www.youtube-nocookie.com/embed/AfpWMQXcWf4?rel=0
    Andy from Source Distribution (UK) Demos the H9
  • https://www.youtube.com/embed/m5r0dTvfkwY?rel=0
    Sing Through Guitar Pedals
  • https://www.youtube-nocookie.com/embed/2V5Hl29MgxI?rel=0
    Tom Quayle Reviews the H9 Max and H9 Control
  • https://www.youtube-nocookie.com/embed/of0TMCfex2Y?rel=0
    Andy from Pro Guitar Shop Demos CrushStation
  • https://www.youtube-nocookie.com/embed/L-MJivF9OI8?rel=0
    Desireé Bassett: Exploring the H9 from Eventide
  • https://www.youtube-nocookie.com/embed/KBh-YQy5O9Y?rel=0
    Jeff Pevar: Eventide Mixing Link and h9 Max Jam
  • https://www.youtube-nocookie.com/embed/7VN8IGHw_7c?rel=0
    H9 Midi Control Setup Tutorial by Molten Voltage
  • https://www.youtube-nocookie.com/embed/PIcsb-I0Cew?rel=0
    Come aggiornare i pedali Eventide: H9, TimeFactor, PitchFactor, ModFactor, Space
  • https://www.youtube-nocookie.com/embed/zSiVrS7JBMY?rel=0
    Eventide H9: Algoritmi e Preset: 1 of 5
  • https://www.youtube-nocookie.com/embed/XmvP8pqwukg?rel=0
    Eventide H9: Algoritmi e Preset: 2 of 5
  • https://www.youtube.com/embed/lEye6NjLsxQ
    Looper for Eventide H9 (Japanese)
  • https://www.youtube.com/embed/Bht2RzvxXNs?rel=0
    Adrian Belew checks out H9 Max
  • https://www.youtube.com/embed/rMk9LtDkQQ0?rel=0
    H9 Core
  • https://www.youtube.com/embed/QhTu8eIWtKM?rel=0
    Best Guitar Effects Checks Out H9
  • https://www.youtube.com/embed/Vclc3mucbf0?rel=0
    Dave Weiner Demonstrates H9 Max
  • https://www.youtube.com/embed/Qiarun8ZPMA?rel=0
    Pete Thorn Using 2 H9's on Tour
  • https://www.youtube.com/embed/xkWgl060vP8?rel=0
    Alan Chaput Demos the H9 Max
  • https://www.youtube.com/embed/Mv-WNnSvmFc
    Rotary Algorithm for H9
  • https://www.youtube.com/embed/O8c5MeSHLr4
    EQ Compressor for H9 - Guitar
  • https://www.youtube.com/embed/v41cu4MwvJ0
    EQ Compressor for H9 - Bass
  • https://www.youtube.com/embed/O6gbfwTWvjI
    Dweezil Zappa Sound Sculptures
  • https://www.youtube.com/embed/9zJK47vk7V4?rel=0
    Premier Guitar checks out H9
  • https://www.youtube.com/embed/PSkfw7lBE7A?rel=0
    Vernon Reid First Impression H9
  • https://www.youtube.com/embed/0oT9lm21BVY?rel=0
    Dave Weiner Gear Rundown
  • https://www.youtube.com/embed/MnWlzARB3eY?rel=0
    Brett Kingman H9 Demo
Top of Page

H9 News

August 18, 2015
Eventide Updates Entire Stompbox Line Pre/Post routing and other features for its H9, ModFactor, TimeFactor, PitchFactor and Space stompboxes. August 18, 2015- Little Ferry, NJ - Eventide today announced the release of software updates for all of its stompboxes. Eventide stompboxes are being used by thousands of artists worldwide and...
July 14, 2015
PRESS RELEASE // FOR IMMEDIATE RELEASE H9 Gets Dirty From Eventide Labs, a new Species of Grit – CrushStation – emerges from the slime. July 14, 2015 - Little Ferry, NJ - Eventide today announced the availability of a new algorithm, CrushStation, for its H9 Harmonizer. The H9 is used by artists worldwide for its delay, modulation, pitch and reverb effects. The...
June 17, 2015
From the depths of the Eventide labs, a new "dirty" effect is making it's way to the H9 universe. Meet CrushStation.
March 31, 2015
Eventide sound designer, Pete Bischoff, talks with ABC News Radio about the H9 Harmonizer stompbox at this year's Luxury Tech Show in NYC.
February 06, 2015
Announcing the much anticipated new Looper algorithm TimeFactor and H9...
Top of Page



Input 1 (mono) ¼ inch mono phone jack
Input 2 ¼ inch mono phone jack
Output 1 (mono) ¼ inch mono phone jack
Output 2 ¼ inch mono phone jack
Expression Pedal ¼ inch mono phone jack
Mini USB Use 2.0 cables only
MIDI In Five pin DIN (Female)
MIDI Out/Thru Five pin DIN (Female)
AC Adapter Jack Power supply included (see below)

Analog I/O

Input Impedance 600K ohms (mono or stereo)
Output Impedance 470 ohms
Recommended Load Impedance 10K ohms or greater


Power 9VDC, 500mA, center pin(+)
Dimensons English: 5.25" (H) x 4.65" (W) x 1.96" (D)
Metric: 133 (H) x 118 (W) x 50 (D) mm
Weight 1.53lbs, 0.7kg / Retail box 3 lbs, 1.36 kg
Top of Page

Frequently Asked Questions


No. All preset selection and editing, along with system mode changes, can be done from the H9 itself. The H9 companion app, H9 Control, works on Windows, Mac, and iOS devices and will connect either via USB or wirelessly via Bluetooth.

Yes. If you're using H9 with a distortion pedal, we recommend that you connect it after the distortion pedal. In general, it's best to place delay effects after distortion effects. That writ, use whatever sequence works best for your sound.

Yes. You can see them in the H9 Control app. From the H9 Itself, Press and hold the X, Y, or Z button. Then pressing the big knob will reveal the saved value of that parameter.

Because there is no digital I/O the sample rate is optimized for maximum audio performance for each effect and is program dependent.

The same as it is for our other products, one year parts and labor.

Power Supply

We recommend the PowerFactor 2, which can run up to four Eventide Stompboxes plus up to 4 9VDC/100mA pedals. The PowerFactor 2 carries a 5 year warranty and includes the cables required to power 4 Eventide stompboxes and the special mounting plate for PedalTrain pedalboards. 
Users may try non-recommended third party power supplies at their own risk. Resultant damage is not covered under warranty. 

9VDC, 500 mA, center pin (+)

Expression Pedal

Absolutely. An expression pedal is a powerful creative controller when used with our stompbox effects. An expression pedal can be programmed to control any combination of the effect parameters. If you're playing live, it's like having 12 hands, 2 for the guitar and 10 for the stompbox's control knobs. To use an expression pedal you must select "EXP" under the System Mode/Utilities/Exp Tip Menu.

Our stompboxes will work with any expression pedal that is a simple resistive load (potentiometer) with a max value of 25k Ohms. For the best performance we recommend the Ernie Ball VP Jr. 25k. Connect the output to the Eventide stompbox expression pedal input. We have also have heard from users who had success with the M-Audio MGear EX-P, Line-6 EX-1, Mission Engineering SP1-LF, Source Audio Reflex Universal Expression Controller, Roland EV-5, and Boss FV500L.

If your expression pedal has a trim pot control, try adjusting it to either end of its range. If your expression pedal causes parameter values to go from min to max and back down to min again as you move from toe to heel, try connecting it using a stereo phone cable rather than a mono cable. If the calibration seems wrong, try plugging the expression pedal in before powering up the stompbox.


Yes. Bypass via MIDI works through a MIDI continuous controller message (MIDI CC.) From the MIDI menu in system mode you can select RVC CTL and you will see a list of things that can be controlled by MIDI CC. The first item in the list is BYP, or bypass.

Yes. If you connect the two or more Eventide stompboxes together via MIDI, you can use the footswitches from one pedal to change presets on the other, and you can use the knobs on one pedal to change values on the other.

The stompbox automatically detects whether a USB connector is attached. If one is, USB is selected for MIDI source and destination and any activity on the DIN connectors is ignored. If a USB cable is not attached, the DIN connectors are used to send and receive MIDI messages. So, if you want to send or receive MIDI using the DIN connectors, unplug the USB cable.

Yes. MIDI Clock Receive and/or Transmit can be activated in the MIDI sub menu of system mode.

You can program MIDI to load presets, change parameter values, set tempo, bypass and more. MIDI programming is done in system mode. The unit can transmit MIDI program change via the footswitches, and MIDI continuous controller via the ten knobs.

Aux Switches

Yes. By using a stereo 1/4 inch y-cable, you can connect one aux switch to two Eventide stompboxes.

Yes. A single, mono aux switch will only work with the "T+R" (tip and ring) setting.

We've successfully used the DigiTech FS300.

You can connect up to three aux switches and use them to control things like preset loading, HotSwitch, and tap tempo.  To use an Aux switch you must select "switch" under the System Mode/Utilities/Exp Tip menu.

You may have to go through the aux switch assignments and make sure the switch is not assigned to multiple things.


A few things. First, the USB interface is MIDI class compliant for use with your computer sequencer or DAW. The USB interface can also be used to dump your presets and load new presets. Finally, the USB interface is used to load software upgrades as they become available. 


Yes. Presets can be stored to and retrieved via the H9 Control app.

To restore factory presets and all system settings, power up while simultaneously pressing the HotKnob button and the Tap footswitch until [INITIALIZING] scrolls across the billboard display. CAUTION: This function will overwrite any presets that you've saved. If you want to be able to restore one or more of your presets you must first save them to a computer.

Yes, but you can restore the factory presets at any time.

Audio I/O

When in relay bypass, the input signal is hardwired to the output signal through relays so that the signal is unprocessed and does not go through the converters. There is an alternate setting for DSP bypass whereby the signal goes through the A/D and D/A.

After extensive testing with an analog dry path vs. converting the signal and doing the wet/dry mix after the converter, we chose the latter due to the fact that it ultimately sounds better. By changing the wet/dry mix after the conversion we avoid comb filtering resulting from phase cancellation which occurs when mixing together a dry analog signal with a signal which has gone through A/D and D/A. This comb filtering effect can seriously degrade your tone depending on the frequency. We use very high quality A/D converters which are very transparent and do not affect your tone (we have been making effects processors used by guitar players for over 40 years and have a proven track record in this area). However, if you so desire, you can use a switcher or a analog pan pedal and run a completely dry analog signal path outside the Stompbox and run H9 at 100% wet. In fact, we have added a "Kill Dry" setting in the system menu if you are running your set up that way.

When used with some low impedance tube amps it may sound like H9 is adding brightness when Active because it is acting as a buffer. This is really letting you hear the highs that were lost from your signal without a buffer. Many amps have buffered effects loops to address this issue. In this case we recommend that you connect our Stompboxes through the effects loop of these amps. If your amp does not have an effects loop, or if you prefer to run our Stompboxes in front of the amp (after the guitar before the amp’s input,) a solution would be to always have a buffer pedal in the signal chain before H9 (if using relay Bypass) or simply always use DSP Bypass mode.

H9 Control App

You cannot connect multiple iOS devices to a single H9 at the same time. Once an iOS device is paired with an H9, another iOS device will be unable to pair to the H9.

One iOS device can connect to at most three H9's at a time. If you connect to a fourth device, your iOS device will drop the oldest connection so there are still only three connections. You cannot, however, connect to one H9 from multiple iOS devices at the same time. Once an iOS device is paired with an H9, another iOS device will be unable to pair to the H9.

Here are a few of the iPad clips we have used at Eventide and had good experiences with:

  • Talent iClaw Mic or Music Stand Holder for Apple iPad
  • IK Multimedia iKlip for iPad
  • Sonic Clamp (for iPhone 4S)

  • Castiv's Guitar Sidekick

H9 Control is not currently available on Android. We have been looking into adding Android support but are not currently actively working on an Android port.

Yes, the H9 Control app works with all our stompboxes via USB on a MAC or PC. To update TimeFactor, ModFactor, PitchFactor, or Space simply update to the latest software version.

H9 Control works on the following iOS devices that are capable of running iOS 6 or greater and support Bluetooth communication: iPhone 4 or higher and iPad 2 or higher.
H9 Control also works on Mac OS X 10.6 or greater or Windows XP or greater via USB or Bluetooth.

H9 Control App, Bluetooth

The 4 digit PIN for Bluetooth pairing is the same as the last 4 digits of your H9's serial number.

The 4 digit PIN for Bluetooth pairing is the same as the last 4 digits of your H9's serial number.

Buying Algorithms

Yes. You can purchase algorithms from the Mac or Windows desktop version of H9 Control using PayPal.

No. We are not currently offering algorithms at discounted prices to existing Factor stompbox owners.

The price of algorithms varies, but most are $19.99.

If you buy an algorithm for an H9 or use the coupon that comes with the H9 to buy an algorithm, it is unlocked on all the H9 stompboxes that are registered to your account. You can register at most five H9 stompboxes to your account.

No. Algorithm purchases are tied to your user account and not to the stompbox, and purchases are not transferable. Algorithm purchases are made through Apple’s in-app purchasing service, and Apple does not allow in-app purchases or other digital purchases to be transferred.

If you have not used the coupon that comes with the H9 to purchase an algorithm, the coupon will transfer to the new owner of the H9. If you have used the coupon to purchase an algorithm, that algorithm will remain tied to your user account.

H9 Max

Absolutely and it's easy to do. Just purchase enough algorithms to your account to reach the Max Status, use the Restore Purchases feature of H9 Control and your unit will be converted into an H9 Max. From that moment on, it's no different from any other H9 Max. If you own an H9 Core, you will need to have purchased a total of 30 algorithms. For a standard H9, 20 algorithms. 

Your H9 core will not become an H9 Max, however that's not really necessary since you can share the algorithms from your H9 Max with up to 4 other H9s (for a total of 5 devices). Keep in mind that if you sell the H9 it will return to the factory default and would then use the algorithms of its new owner. 

Yes. The H9 Max status and algorithms are tied to the pedal, not to the account. This is different than a standard or H9 Core unit where the algorithms are tied to your account and stay with you rather than the device. 


The H9 communicates using the 2.1 version of the Bluetooth protocol, and theoretically, any Bluetooth chip supporting Bluetooth 2.1 should work. In particular we have tested and had success using these two:

StarTech USBBT1EDR2 Mini USB Bluetooth 2.1 Adapter, which can be ordered off of Amazon here:


Kensington (K33956AM) which can be ordered off Amazon here:


We have had mixed success with Bluetooth adapters using the Broadcom chipset, which is used in the BestBuy Bluetooth dongle products from Rocketfish and Insignia and the Inateck® USB Bluetooth 4.0 Low Energy Micro Adapter USB Wireless Bluetooth Dongle among other products. Some users have had trouble getting the Broadcom driver to install successfully. But other users have been able to install the drivers without problems, and those users that have been able to get their Windows computers to install the drivers have also been able to connect to the H9 using these Bluetooth dongles without any problems.