The CS-2 compresses high-input signals while boosting low-input signals, giving you smooth and long sustain without degrading the quality of the original sound. The CS-2 uses a VCA (Voltage Controlled Amplifier) instead of the photocouplers used by the CS-1. The VCA’s speeds up the signal processing and makes the attack much faster compared to the CS-1. The Attack knob can however be used to control this.

Specifications
Controls: Level, Attack, Sustain
Connectors: Input, Output, AC Adaptor
Current Draw: 4 mA (DC 9V)
Weight: 400g (15 oz.)
Input Impedance: 1MOhm
Recommended AC Adaptor: ACA Series

Labels
Black – Made In Japan
The CS-2 was sold from December 1981 to June 1986.

http://www.bossarea.com/boss-cs-2-compression-sustainer/

• 73 mm wide
• 129 mm heigh

This Pedal is discontinued.