Retro Instruments REVOLVER – Dual-Channel All-Tube Vari-Mu Compressor
The Retro Instruments REVOLVER is a world-class dual-channel all-tube vari-mu compressor inspired by the iconic EMI/Abbey Road RS124 and Fairchild designs — reimagined for modern studios.
Combining classic British and American tube compression topologies with modern precision and reliability, the REVOLVER delivers the unmistakable warmth, depth, and musical movement that only high-voltage tube circuits can produce.
Designed for mastering, mixing, and critical recording applications, it offers stunning tonal control, smooth dynamic response, and the lush harmonic complexity that defines vintage analog sound.
Key Features
- Dual-channel all-tube compressor with independent and linked stereo operation.
- True vari-mu design using matched vacuum tubes for ultra-smooth gain reduction.
- Custom input and output transformers for deep low-end and silky highs.
- Continuously variable controls for Threshold, Attack, Release, and Output Gain.
- Blend (Dry/Wet) control for instant parallel compression within the unit.
- Sidechain high-pass filter to retain punch and low-end integrity on mixes and drums.
- Switchable time constants for vintage-style attack and recovery behavior.
- Link switch for perfectly matched stereo compression on bus or mastering duties.
- Fully hand-built in the USA with premium components and NOS tubes.
- Delivers smooth tube glue, harmonic weight, and elegant control across all genres.
Applications
- Mix Bus: Add analog cohesion, weight, and dimensional depth to your final mix.
- Mastering: Achieve musical loudness and harmonic polish while preserving dynamics.
- Vocals: Smooth out peaks and enhance body and presence.
- Drum Bus: Bring punch, warmth, and drive with the iconic Retro tube sound.
Technical Specifications
| Unit Type | Dual-Channel / Stereo Tube Vari-Mu Compressor |
|---|---|
| Circuit Type | All-Tube, Class A, Vari-Mu Gain Control |
| Tubes | Matched dual-triode and pentode tubes (NOS quality) |
| Transformers | Custom-designed input and output transformers |
| Controls | Threshold, Attack, Release, Output Gain, Blend, Sidechain HPF, Link |
| Frequency Response | 20 Hz – 20 kHz ±0.5 dB |
| Noise Floor | -85 dBu typical |
| Max Gain Reduction | Up to 20 dB |
| Input/Output Impedance | 10 kΩ balanced / 600 Ω output |
| Power | Internal universal power supply (100–240V AC) |
| Form Factor | 3U rackmount chassis |
| Weight | Approx. 8.5 kg |
| Build | Hand-built in the USA |
Why Choose the Retro Instruments REVOLVER?
The Retro Instruments REVOLVER captures the soul of vintage vari-mu compression while offering the control and reliability today’s engineers demand.
Its tube-driven circuitry produces smooth, musical compression with incredible harmonic richness — perfect for mastering, mix bus glue, or individual tracks.
Whether used subtly for dynamic cohesion or pushed for vintage character, the REVOLVER delivers the unmistakable Retro tube warmth and power that define timeless analog recordings.
