Specimen 685
Compressor Plus
| Maker | Keeley |
|---|---|
| Type | effects · compressor |
| Introduced | 2017 |
| Price | USD 149 (2026-09) |
| Status | current |
| Catalogue no. | 685 |
A four-knob analog compressor with a dry-blend control and a release switch for single coils or humbuckers.
Watch
Premier Guitar's demo of the Compressor Plus works through the Blend control, which is the knob that decides how much of your dry signal stays in.
Why it matters
It was released in 2017 as an update to Keeley's four-knob compressor, keeping the analogue expander/sustainer circuit. The Blend control mixes the dry signal back in, which keeps picking dynamics and low end as you raise the sustain. A single-coil/humbucker switch retunes the release for the pickups you are using, and the pedal is true bypass with Level, Tone, Blend and Sustain controls.
Note
The most popular boutique compressor design, first released in 2017 as an update to Keeley's classic four-knob compressor. The Blend control mixes dry signal back in and a switch retunes the release for single coils or humbuckers.
Specifications
- analog compressor with expander/sustainer
- four knobs: Level, Tone, Blend, Sustain
- single-coil / humbucker release switch
- true bypass
Before you buy
- Set the release switch to match single coils or humbuckers — it changes how the pedal feels
- Blend keeps the dry signal in, so the pedal can stay subtle
- true bypass, USD 149 (2026-09)