Iron Lung
Electro-Harmonix Discontinued Released 2009 · Discontinued 2022

Iron Lung

A compact digital vocoder pedal with 256 bands, an XLR microphone input and an instrument input. It is aimed at musicians who want vocoder sounds without rack gear, plugins or a large keyboard.

  • Digital vocoder with 256-band resolution
  • Balanced XLR microphone input with 3-position gain switch
  • Gender Bender knob shifts formant from male to female
  • Tone control adds harmonic overtones above noon
  • Split bypass output with an insert cable
  • 9.6VDC 200mA power adapter included
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Description

The Iron Lung is a digital vocoder in a small die-cast pedal. It uses a 256-band design derived from the maker's larger V256 vocoder, and works with a microphone on the XLR input plus a guitar or keyboard on the instrument input for polyphonic playing.

A Gender Bender knob shifts the formant up for a more female character or down for a more male one, with no shift at noon. A tone control changes the overall tonal balance and, past noon, adds harmonic overtones, which helps when a dry electric guitar is the carrier. A three-position switch sets the microphone preamp gain to low, mid or high.

The pedal has a buffered bypass with a footswitch and status LED. The output jack carries the effect signal and, with an insert cable connected at power-up, can split the dry instrument signal and the microphone signal onto separate contacts. It runs from the supplied 9.6VDC power adapter. The model was released in 2009 and was discontinued in 2022.

Video

Specifications

Brand
Electro-Harmonix
Model
Iron Lung
Category
Effects and pedals

Inputs

Microphone input
XLR, fully balanced
Instrument input
Instrument input jack
Mic gain settings
3 (LO / MID / HI)

Outputs

Output
Instrument output jack
Split bypass output
Dry signal on tip, mic vocal on ring (insert cable)

Audio

Circuit
Digital
Bypass
Buffered Bypass
Audio
Mono
Vocoder resolution
256 bands

Controls

Gender Bender
Knob, formant shift (no shift at noon)
Tone
Knob
Mic gain
3-position toggle switch
Footswitch
Bypass footswitch with status LED

Power

Power supply
9.6VDC-200mA power adapter included
Current draw
150mA

Physical

Dimensions (in)
4.5 x 2.75 x 2.1
Chassis
Die-cast

In the box

Power adapter
Included

Data: ehx.com; photos: Electro-Harmonix product page · updated 2026-10-13 · Found a mistake? Write to us