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The Boss CS-3 Compression Sustainer is the classic workhorse compressor: Level, Tone, Attack, and Sustain, all in a pedal that’s been in continuous production since 1986 because it still does the job.

It compresses louder signals while boosting quieter ones, giving you smooth sustain and a more even response without turning the whole thing into a science experiment.

What keeps it useful is the control set. The Tone knob lets you keep the top end from disappearing as you increase compression, while Attack lets you decide how quickly the pedal clamps down on the note. Light settings give you clean leveling and a little extra glue. Turn it up and you get more obvious compression.

This one is in excellent condition, no Velcro, and sold as-is with no box. Fully functional and ready to do what a CS-3 does best: stay useful long after the novelty wears off.