BOSS CS-3 Compression Sustainer Guitar Effects Pedal

The BOSS CS-3 Compression Sustainer is a classic analog compression pedal trusted by guitarists for decades. Combining natural-sounding dynamic control with rich sustain, the CS-3 tightens your tone and adds polish to every note without introducing unwanted distortion or coloration.

Ideal for rhythm players who need controlled, articulate dynamics and lead guitarists seeking extended, singing sustain, the CS-3 performs across styles from country and funk to blues and rock. Its four intuitive controls — Level, Tone, Attack, and Sustain — put precise dynamic shaping at your fingertips.

Built on the proven BOSS compact pedal platform, the CS-3 features a high-performance VCA circuit for stable, transparent operation in any signal chain. Buffered bypass preserves tone integrity over long cable runs, and the BOSS five-year warranty provides lasting reliability.

Key Features

• High-Performance VCA Circuit: Delivers stable, low-noise compression that transparently controls dynamics without altering the core character of your guitar tone.
• Natural Compression and Rich Sustain: Provides smooth dynamic control and extended note sustain without harshness or pumping artifacts.
• Attack Control: Adjustable attack time lets you preserve or soften the transient pick attack.
• Tone Knob: Shapes high-frequency response for added brightness or warmth.
• Sustain Control: Dial in compression depth from subtle leveling to heavy sustain.
• Low-Noise Design: Engineered for transparent operation, keeping the noise floor low even at high sustain settings.
• Buffered Bypass: Maintains consistent signal level and frequency response throughout your full pedalboard signal chain.

Technical Specifications

• Input Impedance: 1 M ohm
• Output Impedance: 1 k ohm
• Current Draw: 20 mA
• Width: 2-7/8 inches
• Depth: 5-1/8 inches
• Height: 2-3/8 inches
• Weight: 14 oz