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Boss CS-3 Compression Sustainer Guitar Effects Pedal

The CS-3 Compression Sustainer Pedal is the perfect pedal for guitarists and bassists who want to sound their best.


(12 reviews)


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MSRP: Old Price $149.99 Discounted Price $99.99 Save : $50.00 (33%)
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MSRP: Old Price $149.99 Discounted Price $99.99 Save : $50.00 (33%)
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The CS-3 Compression Sustainer pedal continuously compresses louder signals while simultaneously boosting lower signals, providing smooth sustain without degrading the original sound quality. The onboard Level, Tone, Attack and Sustain controls allow you to precisely shape the tone to your liking. The CS-3 can be used for multiple genres such as a percussive funk all the way to beautiful, clean arpeggios. The CS-3 is also can enable your clean guitar sound to cut through a dense ensemble arrangement. The CS-3 also features a low-noise design for super-quiet operation.

Order your Boss CS-3 Compression Sustainer Pedal from Sam Ash Direct today with the security of our 45/60 day return/price protection policy, and be sure to take advantage of our fast, free shipping.

Things You Will Get:

  • Effect Pedal
  • Dry Battery 9 V
  • Manual

no i don't think so


It is just ok and surprised it did not come with a 9V charger.



Recommend this to anyone


Great devise soynds great



Great Quality


Great sound - good analog quality





I do use the pedal for a touch of compression on the crunch channel. With my EQ pedal and the CS-3 I can achieve that 70's studio rock sound.



Great Pedal!


Recently got this pedal from Sam Ash and I love it. It makes the sound smoother and more controlled! Definitely recommend this pedal.. The online purchase process from Sam Ash was also very easy and quick!

Vik MiKaeL

San Pedro, CA


Simple, Reliable Pedal


There are not a lot of bells and whistles here, just a tried and true compressor that has a spot on any pedalboard. You will most likely have to play around with settings quite a bit to find the sweet spot, but once you do, it's easy to use.

Brian V

Huntington, NY


Solid compressor


This is a very simple compressor that really works very well, and can save you some money compared to other boutique comps. The tone control is great for bringing back any highs you may lose, and the sustain feature is great for adding dirt and fatness to existing overdrives you may already have. Excellent on bass too.

practice junkie

Indianapolis IN


the best I found


I've tried a lot of compressors sustainers and this is the best I found. Other than a rack mount studio compressor limiter like a Urie, this is the best stomp box I tried. I haven't tried the "Neely" one yet. And I don't see how it could be a whole lot better unless it has some kind of sophisticated noise gate system built in. I don't know. Anyway, this doesn't add any noise of it's own, yet I've read complaints by some who say it is noisy. Remember, a compressor does lower your signal ceiling, so it makes your output level closer to the "noise floor". Thereby, you should put this type of device at the very beginning of the chain. In other words go directly from your guitar into this box. That way you don't compress your signal closer to the noise floor of all the other boxes and devices you're using. I prefer not using a noise gate unless absolutely necessary. I hope this doesn't confuse anyone. Now with all that said, I couldn't detect any noise coming from the effect itself, a big plus in my books. And I rate this device high because as far as sound quality goes, it's right up there with the MXR Dyna Comp. Some people like the simplicity of the Dyna Comp and it's great sound. The CS-3 has the same great sound but has a couple of added features, tone and attack. I like simplicity but found I can get some interesting variations using different attack settings, like getting that hard biting sound to a softer "pop". The tone control also is cool for a warmer empathis. It's hard to describe, you have to try it and experiment with this a while to get my jest. When you turn it off, I believe it is a true bypass cause there's no change in my original tone. It seems very rugid and well built, metal casing (metal is a must in a stomp box, cheap plastic ones won't hang if you're a true rock and roller). Now the down side; This thing will go through a battery faster than a rabbit being chased by a cayote. If you're a professional, get the adapter. They sell adapters here with a daisy-chain that will power this and several other brands besides the Boss, and they're really inexpensive. As far as reliability, I don't know, I haven't owned it that long. I did own a Dyna Comp that lasted 10 years until someone stole it. It's probably still working wherever it is? Bottom line, this isn't the cheapest, but it's relatively inexpensive. And it does what it's sposed to really good. Boss is a very reputable outfit, and I've had good luck with thier equipment. Try it out for yourself, I think you'll be happy with it. That's just my opinion. All I can say is, try it out for yourself. And if you get the chance, A/B compare it to the expensive "Neely" one and let me know what makes the Neely so great.


High Desert, CA


Solid Performer


I like this pedal and I use it quite a bit. But I am still trying others and looking for the "perfect" sustainer, so I have to give this one a 4, not a 5. No real complaints, I just expect to find a little more sustain, maybe little less high end. Until then, though, this is my sustain pedal.


new york


I should have bought this earlier


Simple. Great sounding sustain. this pedal will make your guitar and amp sound totally awsome. smooth like butter whether you play clean blues metal so shredding solos you will love this pedal BUY IT NOW!!!


Garden Grove, CA


CS-3 Compression Sustainer Guitar Effects Pedal

4.6 12


Model CS3 Compression Sustainer Pedal

Boss CS-3 Compression Sustainer Owner's Manual

Warranty Info:

CS-3 Compression Sustainer Guitar Effects Pedal

Effects pedals: 5 years parts, 3 years labor All other products: 1 year parts, 90 days labor