Boss CP-1X Multiband Compressor Pedal

Discover uncolored compression in your guitar's sound with the CP-1X. The pedal automatically analyzes multiple frequencies to deliver rich, dynamic control.

Powered by BOSS's MDP technology, the CP-1X is a type of multiband compressor for guitar that preserves the character of your instrument and technique for unlimited musical expression. Intelligent processing analyzes your signal in multiple dimensions as you play, providing advanced dynamics control that never colors or muddies your tone like typical stompbox compressors can. The simple, four-knob interface makes it easy to dial in sophisticated results, while the handy gain reduction indicator always shows you how much compression is being applied. Optimized for all types of guitars, the CP-1X offers next-generation performance for every style of music.

Intelligent Processing for Natural Sound

When you first plug into the CP-1X, you're in for a totally new guitar compressor experience. Typical stompbox compressors color and restrict your sound, and are hard to dial in for various playing styles. The innovative CP-1X eliminates these drawbacks and more, opening up a world of expressive potential. The powerful MDP engine analyzes your guitar's many different tonal elements in real time, providing natural compression that intelligently follows and adapts to your playing. With this high-tech approach, your true tone and technique always comes through, even when using aggressive settings for that effected "squish."

Tap Into New Levels of Musical Expression

No matter what kind of guitar or style you play, the CP-1X always delivers rich, musical tone. From mellow phrases read more and arpeggios to heavy rhythms, fast solos, and beyond, every playing nuance remains detailed and defined. The pedal also provides superior performance for chicken pickin' country licks, funky rhythm grooves, and other standard guitar compressor applications, and works great as a booster thanks to its punchy, transparent sound. On seven- and eight-string guitars, the CP-1X easily controls upper-range dynamics without compromising your powerful low-end tone. And when used with acoustic-electric guitar, the natural, lush overtones are fully preserved as you go from gentle fingerpicking to full-chord strums.

Studio-Level Results with Simple Controls

With the knobs on most pedal compressors, what you see is what you get. Not so with the CP-1X, as the pedal's controls interact with each other at a highly detailed level. When you turn a knob, numerous interlocked parameters are adjusted under the hood at once. This gives you dynamics control and tone shaping ability that far exceeds standard compressor pedals, providing results previously attainable only with high-end studio processing. The good news is that you don't need to be a sound engineer to use the CP-1X -- its sophisticated MDP processing has been meticulously fine-tuned by the BOSS engineers to let you dial in ultra-polished tone with familiar stompbox controls.

High-End Features for Pro Performance

The CP-1X features pro-level 18-volt input circuitry that provides ample headroom for the hottest guitar pickups, ensuring exceptional clarity with any instrument. A 16-segment gain reduction indicator clearly displays the compression amount, making it easy to see what the pedal's doing. The CP-1X's noise performance is also extremely low in comparison with other compressors, another huge benefit brought by BOSS technology.

MDP: Advanced Tech, Superior Tone

Leveraging decades of research and development, BOSS's proprietary Multi-Dimensional Processing (MDP) technology offers a fresh approach to achieving exceptional guitar tones. In real time, MDP analyzes the various elements that make up the sound, including frequency, overtones, dynamics, pickup response, and more. Various playing characteristics are analyzed as well, such as note register, single notes vs. chords, bends, vibrato amount, and others. Each individual element is then processed in unique ways to produce optimized tones as you play. With its ultra-detailed, high-tech approach, MDP delivers tone quality and playability that reaches far beyond the limits of traditional effects processing.


- Next-generation guitar compressor that uses BOSS's advanced MDP tech to preserve musical expression
- Intelligent circuitry adapts to every register and playing nuance, providing natural compression with exceptional clarity
- Sophisticated under-the-hood processing with multiple interlocking parameters, accessible with simple stompbox controls
- Gain reduction indicator shows the current compression amount at a glance
- Digital circuitry greatly reduces noise, a common problem with standard compressors
- Professional 18-volt input electronics provide ample headroom for clean, punchy sound
- Works with all types of guitars, including seven- and eight-string instruments and acoustic-electrics
- BOSS five-year warranty
WARNING: Cancer and Reproductive Harm -
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- Nominal Input Level: -20 dBu
- Input Impedance: 1 M ohm
- Nominal Output Level: -20 dBu
- Output Impedance: 1 k ohm
- Recommended Load Impedance: 10 k ohms or greater
- Bypass: Buffered bypass

- Pedal switch
- COMP knob
- RATIO knob
- ATTACK knob
- LEVEL knob

- Indicators: CHECK indicator (Serves also as battery check indicator), GAIN REDUCTION indicator

- INPUT jack
- OUTPUT jack
- DC IN jack

- Power Supply: Alkaline battery (9V, 6LR61), AC adaptor (sold separately)
- Working Voltage: 18 V
- Current Draw: 90 mA
- Expected battery life under continuous use: Alkaline: Approx. 3 hours * These figures will vary depending on the actual conditions of use.
- Accessories: Owner's Manual, Leaflet ("USING THE UNIT SAFELY", "IMPORTANT NOTES", and "Information"), Alkaline battery (9V, 6LR61)
- Width: 73 mm, 2-7/8 inches
- Depth: 129 mm, 5-1/8 inches
- Height: 59 mm, 2-3/8 inches
- Weight (including battery): 450 g, 1 lb
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 1.25 lbs
Shipping Dimensions: 6 x 4 x 3 in
Manufacturer Part Number (MPN): CP-1X

For support or warranty questions, please contact the manufacturer:
Phone: 323-890-3700

Reviewers gave this product an overall rating of 5 out of 5 stars. (1 ratings)
Submitted March 16, 2021 by a customer from
"Transparent Compression With No Thump"
Overall: 5 out of 5 stars
(see rating details)
Verified Customer zZounds has verified that this reviewer made a purchase from us.
It took me a long time to appreciate compression. When you’re first trying to understand it, the most difficult part is to actually hear the effect, especially compared to a delay or phaser or fuzz. Since I’ve almost exclusively only played prog or hard rock my entire life, a compressor was never necessary as I could get all the compression I needed from an overdrive pedal. And trying to understand concepts like “sitting in the mix” or “squashed tone” just didn’t jive with me. In order for me to really hear a compressor I needed to crank it. Once you crank most stomp box compressors they become these breathing things that barely resemble your original tone. I have since discovered the magic of using light compression for clean tones to take the edge off the highs and lows and, yes, help it to sit in the mix better. As most stomp box compressors are modeled off of the Ross-style compressor, they tend to squash the sound so noticeably, to me at least, that it creates this distinctive spitting sound at the beginning of each note that is plain offensive to my ears. And forget about using a compressor like that with fuzz or distortion! You get nothing but noise and feedback. What I was looking for was a compressor that lets the unaffected tone of your guitar come through while evening out the dynamics so the volume isn’t all over the place- basically a totally transparent compressor with no coloration at all. Enter the Boss CP-1x. It’s a fully digital multi-band read more compressor that uses some slick algorithms to keep your dynamics in check without affecting your tone at all. There are lots of grumblings about it being digital as opposed to analog, but so what? Your digital delay that you love so mush is, wait for it, digital too. Most high end reverb pedals these days are 100% digital and on and on. It has an internal voltage transformer that brings the 9v signal up to 18v giving lots of internal headroom. No matter how hard you compress the signal it never breathes and therefore never makes that awful sputtering sound most compressors do. The noise floor from this pedal is much, much lower than most stomp box compressors, but it’s not completely eliminated. It has a handy gain reduction meter so you can see with your eyes how much of your signal is being compressed. And of course it’s sparkly blue and built like a tank.This is as transparent a compressor as you’re going to get at this price point. If you want to even out your sound without affecting your tone, get this. If you want your sound to breathe like country pickers and funkadelic masterblasters, this is not the compressor for you.

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