Filter / Wah (Harmonic Energizer filter/boost) · $150
The Gremlin Machine Shop Crystal Blade (Harmonic Screamer) Solo Boost is an analog harmonic Energizer filter/boost pedal based on the Systech Harmonic Energizer + Tube Screamer, with Freq (frequency notch), plus Tone and gain controls, made in USA. Features an expression input. From $150.
| Category | Filter / Wah (Harmonic Energizer filter/boost) |
| Circuit / based on | Systech Harmonic Energizer + Tube Screamer |
| Signal | Analog |
| Controls | Freq (frequency notch), plus Tone and gain |
| Switches | Tone toggle, Clipping toggle |
| Footswitches | 1 |
| Expression input | Yes |
| I/O | Expression jack (remote Freq control) |
| Power | 9-18 |
| Country of manufacture | USA |