Boss CS-3 Compression Sustainer

About the Boss CS-3 Compression Sustainer

The Boss CS-3 Compression Sustainer is a classic, affordable compressor with four controls: Level, Tone, Attack and Sustain. The Attack knob sets it apart from simpler squeeze boxes, giving you control over how quickly it clamps down, and the Sustain and Level controls double as input and output volume. It replaced the older CS-2, which some still prefer for its warmth, turns up cheap on the used market, and is a common candidate for modding.

In one paragraph

The page's figures as one paragraph, assembled for quoting; not written by hand.

Listings of the Boss CS-3 Compression Sustainer we watched from listing to sale typically went in 34 days (69 watched), a steady; it sells for a median of €45 over the last 90 days across 130 recorded sales, with most examples landing between €45 and €55. New, it costs €111 at Thomann (read 14 October 2026), so a used one at the median saves about 59%. There are 362 listings live right now across eBay Germany, eBay United States, Reverb, from €41 asking, a median ask 100% over the sale median. Figures computed 18 October 2026 by Doirado from cross-platform listing data.

What owners have said elsewhere

Paraphrased from 210 discussion threads among 11 owners, 2024-2025. No names, nothing quoted.

Owners treat the CS-3 as a dependable, no-fuss compressor: a classic that will do the job, good enough as an only compressor, and, in the words of more than one owner, very usable, the kind of pedal you never get rid of. What they like about it specifically is the Attack knob, which cheaper compressors leave out, and how cheap a used one is. The usage advice is consistent: run it early, right after the tuner and before your gain, and remember that Sustain acts as an input volume and Level as an output, so you can also use it as a boost after your drives. The main gripes are honest ones. It colors the tone, though owners say less than an MXR Dyna Comp, and it can be noisy, adding hiss and even a bit of feedback, so some run it inside a noise gate's loop and others have it modded to quiet it down. A few simply could not dial in a sound they liked and moved to a more transparent compressor like a Keeley or a Wampler Ego. For the money, though, it stays on a lot of boards.