The H90 sells for $899. It's a dual-engine multi-effects unit in a stompbox chassis.

Overview

It's the top guitar-focused offering in the company's lineup. At $899, it targets serious performers and studio users who want more than modulation and delay. It has dual DSP engines, two independent effects chains, and can run two algorithms at once per program. Reviews say it has one of the easiest learning curves among high-end multi-effects processors, and owners report it delivers on both power and ease of use. Early adopters have flagged problems, though. Some units arrived with malfunctioning knobs, and firmware bugs were reportedly common enough to spark online discussions. These aren't dealbreakers, but this isn't a plug-and-play pedal for the risk-averse.

Specifications

Key Features

Dual-Algorithm Processing with SIFT Technology

The H90's core feature is running two algorithms at once per program, which the dual DSP engines make possible. That means you can layer a polyphonic pitch shifter with a shimmer reverb and modulate both in real time. According to some sources, SIFT (Spectral Instantaneous Frequency Tracking) technology gives it low-latency polyphonic pitch shifting, a big step up from older harmonizers that struggled with tracking accuracy. According to Eventide, this allows natural-sounding harmonies even in complex chordal passages, which makes it a favorite among guitarists who rely on pitch manipulation in live settings.

Flexible Signal Routing

Routing is the H90's operating idea. With two independent effects chains, users can route signals in series, parallel, or split configurations. That covers everything from dual-amp simulations to complex send/return setups within a single pedal. Aux inputs and outputs extend this further, allowing integration with external gear like vintage spring reverbs or analog delays. Studio users appreciate this for building hybrid processing chains, while live performers use it to switch between clean and effected signals without tone suck. The interface is praised as intuitive, and owners report that navigating routing options feels natural.

State-of-the-Art DSP Architecture

Eventide claims the H90 uses "state of the art DSP." The dual-engine design allows simultaneous algorithm use and also reduces latency, which matters on stage. Exact frequency response, THD, and signal-to-noise ratios aren't documented. The output impedance is 600 Ohm with a recommended 10 kOhm load, which suggests it's optimized for line-level use and minimizes tone loss when feeding mixers or audio interfaces. The USB connection allows direct recording and firmware updates, and some users have relied on those updates to resolve early firmware-related issues.

Historical Context

The H90 arrives decades later as the culmination of that lineage, designed for guitarists who expect studio-grade processing in pedal form. It follows the H9, which had been in production for approximately a decade as of 2022, suggesting Eventide took its time refining the approach. The H90 isn't a reinvention. It consolidates and expands, packing the capabilities of multiple units into one chassis. Its release coincided with a broader trend of high-end multi-effects pedals challenging traditional stompbox setups, but the H90 prioritizes depth over convenience, appealing to those who treat effects as instruments in their own right.

Collectibility & Value

Extended warranty options run 2 years for $74.99, 3 for $129, and 5 for $239. That suggests Eventide anticipates potential reliability concerns, and user reports of units arriving with faulty knobs or firmware glitches echo this. These issues appear resolvable via updates, but they've contributed to cautious early adoption. No resale prices are documented, but the $899 MSRP indicates a premium purchase. Owners who value sonic flexibility and Eventide's algorithmic legacy may hold onto theirs, while others may trade down if firmware or hardware quirks prove persistent.

Similar items on eBay

Recently sold on eBay: $616–$899 (median $720, based on 13 completed sales, past 12 months)

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Related Models

• Eventide H3000 (1986-1998)
• Eventide H8000 (2000-2010)
• Eventide H910 (1975-1984)
• Eventide H949 (1979)
• Eventide Omnipressor
• Alesis Microverb II
• Alesis Microverb (1986)
• Alesis MIDIverb II
• Alesis MIDIverb
• DigiTech Bass Synth Wah

Market Value

┌──────────────────────────────────────────────────────────────────────────┐
│ EVENTIDE H90                                                    Nov 2026 │
├──────────────────────────────────────────────────────────────────────────┤
│ High      $999                                    Latest            $746 │
│ Median    $720                                    Trend                — │
│ Low       $29                                     Volume           ~4/mo │
├──────────────────────────────────────────────────────────────────────────┤
│ $1,000 ┤                                                                 │
│        │                   .                                    .        │
│        │. .                .                    .               .  .    .│
│   $571 ┤               .                             .                   │
│        │                                                                 │
│        │                                                                 │
│        │                                                                 │
│     $0 ┤                                 .                               │
│        ├─────────────────────────────────────────────────────────────────│
│    vol │▂ ▂            ▂   ▅             ▂      ▂    ▂          █  ▂    ▂│
│        └─────────────────────────────────────────────────────────────────│
│         2026-05                      2026-07                      2026-08│
└──────────────────────────────────────────────────────────────────────────┘