STRING9
Electro-Harmonix Discontinued Released 2022

STRING9

A digital guitar pedal that turns a guitar signal into nine string ensemble and string synthesizer sounds, selected with a rotary switch. It suits guitarists who want orchestral and vintage string tones without special pickups, MIDI or instrument modifications.

  • Nine string ensemble and string synth programs on a rotary switch
  • Three Freeze programs hold notes and chords with infinite sustain
  • Works with a standard guitar, no mods, special pickups or MIDI
  • Separate Effect and Dry volume knobs plus a dedicated Dry output
  • Ctrl 1 and Ctrl 2 adjust parameters per program
  • Buffered bypass, switchable to mute by internal DIP switch
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Description

The STRING9 is a polyphonic digital pedal from the Electro-Harmonix 9 Series. It processes a regular guitar signal into string ensemble and string synthesizer voices, and needs no modifications, special pickups or MIDI. A rotary switch picks one of nine programs: Symphonic, June-O, PCM, Floppy, AARP, Crewman, Orch Freeze and Synth Freeze, plus Vox Freeze. The programs cover orchestral, analog string synth, sampled string section, optical-disc sampler and choir-and-strings sounds. Three of them add the EHX Freeze effect, which samples and holds notes or chords with infinite sustain.

Two knobs, Ctrl 1 and Ctrl 2, adjust parameters specific to each program. Separate Effect and Dry volume knobs set the mix at the Effect output. A second Dry output always carries the input signal at unity gain through a buffer, so the dry and processed signals can go to separate destinations.

The pedal has one input, an Effect output and a Dry output. Bypass is buffered by default, and an internal DIP switch changes it to mute. A status LED shows when the effect is on and blinks while waiting for a Freeze trigger. It runs from the supplied 9.6VDC power adapter.

Video

Specifications

Brand
Electro-Harmonix
Model
STRING9
Category
Effects and pedals

Audio

Circuit
Digital
Audio
Mono
Bypass
Buffered Bypass
Programs
9 (rotary switch)
Freeze programs
3 (Orch Freeze, Synth Freeze, Vox Freeze)

Controls

Patch knob
Selects strings patch
Ctrl 1
Adjusts parameter based on selected preset
Ctrl 2
Adjusts parameter based on selected preset
Effect Vol
Volume of selected patch at Effect output
Dry Vol
Volume of untreated signal
Internal switch
Bypass Mute DIP switch
Footswitch
Bypass, toggles effect on/off

Inputs

Input jack
1

Outputs

Effect output
1, source impedance 500Ω
Dry output
1, buffered, unity gain, source impedance 500Ω

Power

Power supply
9.6VDC-200mA power adapter included
Current draw
100mA
Power jack
9VDC, center-negative; do not exceed 10.5VDC

Physical

Dimensions
4.75 x 4 x 2.25 in

In the box

Power adapter
Included

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