The Retro Instruments REVOLVER – A Revolution in a Rack. When you first put your ears to the Retro Instruments REVOLVER, you’ll hear some very legendary compression, an ingredient many have kept secret. You will hear lively and vibrant dynamics, the same you have imagined for your own project. Now you will know the sound, it’s as unmistakable as applesauce. Years of Development. As an experimental project in 2011, a few Retro Instruments REVOLVER’s were built and field tested with select studios. We started with the famous British-modified Altec 436 compressor and added features you need for tracking, mixing and mastering. We needed it right for Rev. A. Here it is. The Retro Instruments REVOLVER puts You in Control. For the first time ever, you get all the adjustments to dial in the type of dynamics you’ve heard on numerous albums. We’ve added features like a side-chain filter, stereo linking and continuously variable threshold, attack and release. Built like a Tank. The Retro Instruments REVOLVER might be guilty of being slightly overbuilt here in the USA, but it’s definitely done purposely to give you years of uninterrupted performance. Each unit passes a series of critical tests. Tubes and other components are selected for top performance and proper stereo tracking features
A most desired compression signature.
Ideal for the stereo bus and excels at tracking, mixing and mastering.
Independent controls with stereo linking.
Continuously variable input, output, attack, release and threshold.
Dual Threshold Control allows control of ratio and amplifier saturation.
Low noise and high separation.
High-quality audio transformers deliver low distortion and rule flat response.
Fully differential all-tube signal path.
Transformer-balanced inputs and outputs on XLR connectors
Illuminated VU meters
Front panel meter zero controls.
Internal tube balancing facility.
120 or 240 Volt operation.

Specifications
Number of Channels: 2
Controls: Input, Output, Attack, Release, Threshold, Side-chain filter select, Stereo Link
Ratio: Adjustable between 1.5:1 and 5:1
Usable Input level range: -20 to +20 dBu
Output level range: -30 to +18 dBu
Output clip level: +23 dBu (1% dist)
Attack Time: 2 to 40 milliseconds
Release Time: 200 milliseconds to 2 seconds
Highpass side-chain filter: Selectable 6 dB detector rolloff at 90 or 250 Hz.
Distortion: Less than 0.05% below compression threshold. Approx. 1% to full-scale compression.
Frequency Response: 20-20,000 Hz. ± 0.5 dB
Rack Space: 2U
Depth: 9.5 inches
Weight: 22 pounds
Connections: IEC Power, XLR input and output x2
Power Requirements: 120 VAC or 240 VAC. 22 Watts
Fuse Rating: Standard fast-blow 3AG-style fuse. 1 A 120 VAC, 1/2 A 240 VAC