Electro-Harmonix Superego Synth Engine (2012–2025)
A discontinued analog synth effects pedal for guitar. It makes synthesizer-like tones with polyphonic sample and hold and glissando effects.
Overview
The Electro-Harmonix Superego Synth Engine is a guitar effects pedal released in 2012 and discontinued in 2025. The circuitry is all analog. It makes synthesizer-style effects such as polyphonic sample and hold, fluid glissandos, and pad-like textures. It turns guitar signals into oscillator-like outputs and has three operation modes. There is also a built-in effects loop that processes only the wet signal. EHX marketed it as a fully-featured "freeze" pedal and positioned it as a more advanced alternative to its Freeze pedal, with broader sonic capabilities.
Specifications
| Product type | Synth Engine pedal / guitar effects pedal |
| Year Released | 2012 |
| Status | DISCONTINUED 2025 |
| Circuitry | all-analog circuitry |
| Effects loop | built-in effects loop (processes wet signal only) |
| Modes | 3 Operation Modes |
| UPC | 683274011271 |
Design
The Superego is all analog and has a built-in effects loop. External effects in that loop process only the wet, synthesized signal, so the dry guitar tone stays untouched.
Context
Users compared the Superego directly to EHX’s Freeze pedal and noted that it does more than simple sustain. One description called it "a truly original pedal" with a wider range of synthesizer-esque effects, from ethereal pads to dynamic pitch shifts. A later variant, the Superego Plus, added additional features and effects.
Market
The Superego originally priced at $323.10. It has sold for as low as $242.90 in recent retail listings. It was marketed as a premium, specialized effects unit. One user noted it may not be a "desert island" pedal, which suggests niche rather than universal appeal.
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