Why I buy this one ?
- Compact compression & sustainer pedal with high-quality circuitry
- Compresses loud signals and boosts softer signals for a smooth overall sound
- Onboard Level, Tone, Attack and Sustain controls for precise tonal shaping

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What our customer's say!

"The truth is somewhere in the middle. ", Over the years, I have owned several of these units. While they may be noisy, they serve their purpose in terms of punching up the sound when I play lead. I find the noise is basically inaudible when I am soloing.
My pedal came yesterday from Harmon Music and their customer service was great as usual. The pedal came withing 2 days of being billed and it fit in my mail box so I didn't have to wait for UPS and I didn't have to worry about the pedal being stolen from me as it could have been left outside my door. Thanks for everything.

"One Of The Worst Comrpession Pedals Out There", The Boss CS-3 is one of the most noisy pedals I've ever heard. If you enjoy hissing, then this may be the pedal for you. No matter what knob you choose to turn it is noisy.

If you want a real compression pedal, that has ZERO noise, then check out TC Electronic's Vintage Compression. You might have to shell out some extra cash, but there's NO substitute for a good compression and you might as well go with one of the best out there: TC Electronic.

I've been generally happy with Boss products, but this pedal is something that just sounds awful.

"Boss CS-3 Compression/Sustainer", If you play the guitar, you really should have this pedal.


First, adjust the Volume (Level), Tone, Attack and Sustain.

For a best result, turn your Volume and Sustain all the way up and Tone and Attack to preference.

When you turn it on, you will tell. It makes your guitar very sensitive. It acts like you have the best pick ups on Earth. If you breath on your cords, you can hear it.

You can pull off mind melting pull offs.

You can use it as a tone adjuster.

You can use it for a slight Volume pedal.

If you use it when you have your clean sound on, it will produce and plucky sound.

If you use it with other distortion pedals, it will produce a clearer sound.

If you use it with any pedal, it will produce a different sound, so it will be like you have an infinite number of pedals.


For the bad part, it is VERY noisy. It will make a very loud hiss. While you play with it on, it won't make any hiss at all. So, just turn it off when it's not in use. Here's a hint, when you're playing, you can keep it on all the time but take another of one your pedals and turn that on but turn the Volume all the way down and it won't make any noise at all.

If you've never used a pedal before, you need 2 cords. You have to plug your amp into the input and your guitar into the output.

And of course, for all pedals, you should unplug your input for a much longer battery life (9 Volt) when not in use. If you leave it plugged in, your battery will last 2 days; unplugged, about 6-12 months, depending how long you play.