H90 Harmonizer

Loads and plays custom programs: Use playlists and banks to organize and trigger combinations of effects quickly.

Dual effect presets per program: Run two effects at once in series or parallel.

Flexible signal routing: Supports stereo, insert routing, and dual path setups.

Live performance mode: Assign custom actions to footswitches like tap tempo, bypass, or parameter changes.

Customizable controls: Map knobs, pedals, or switches to control multiple parameters instantly.

Searchable effect library: Browse by algorithm or effect type from a large factory and user preset collection.

Real-time parameter tweaking: Use quick knobs and performance controls to adjust settings on the fly.

Built-in HotSwitches and HotKnob: Instantly jump between parameter snapshots or sweep multiple values together.

Comprehensive I/O options: Includes USB-C, MIDI, expression pedal, aux switch, and multiple audio ins/outs.

Companion software support: H90 Control app allows editing, preset management, and firmware updates via computer.

Integrated tuner and tempo tools: Built-in chromatic tuner and tempo syncing for precise performance setups.

Save and recall user presets: Easily store your own sound designs and recall them as needed.

General Specifications

Multi-effects dual-engine audio processor

Supports mono and stereo processing paths

62 effect algorithms (including legacy H9 algorithms)

Up to 2 algorithms simultaneously (one per path)

99 factory programs + 99 user-editable programs per list (with unlimited lists)

Expression pedal and auxiliary switch support

Built-in tuner and looper (up to 60 seconds stereo / 120 seconds mono)

True Bypass or Buffered Bypass (relay switchable)

Spillover between programs with seamless transitions

Audio Specifications

Sampling Rate: 48 kilohertz

Frequency Response: 20 Hertz to 20 kilohertz ±1 decibel

Dynamic Range: 114 decibels (A-weighted)

THD+N: Less than 0.003 percent

Input Impedance: 1 Megohm (instrument), 18 Kilohms (line)

Output Impedance: 470 Ohms

Maximum Input Level: +8 decibels (instrument), +14 decibels (line)

Maximum Output Level: +14 decibels

Connectivity

2 x 1/4-inch TRS balanced line/instrument inputs

2 x 1/4-inch TRS balanced outputs

1 x 1/4-inch Expression/AUX jack (supports 3-button footswitch)

1 x 1/4-inch insert send

1 x 1/4-inch insert return

1 x USB-C port (for updates and H90 Control software)

1 x MIDI In, 1 x MIDI Out/Thru (5-pin DIN)

1 x microSD card slot (for preset backup and software updates)

Control & Interface

Five push knobs for direct parameter control

One large push encoder for navigation

Three assignable footswitches with LED rings

OLED display

Performance HotKnob for live tweaks

H90 Control software (Windows and macOS) for editing and management

Multiple routing modes: Insert, Dual Mono, Dual Stereo, Series, Parallel

Power Requirements

9 Volts DC, center-negative

Current draw: 500 milliamps minimum

Power supply included (universal input)

Physical Specifications

Dimensions: 7.5 inches (width) x 5 inches (depth) x 2 inches (height)

Weight: 2.25 pounds (approximate)

Firmware & Software

Firmware version: 1.11.4 (as per manual)

Supports firmware updates via USB-C

Presets and settings managed with H90 Control software

Accessories Included

9 Volt DC power supply

USB-C cable

Quick start guide