--- product_id: 543834055 title: "JOYO Bass Compressor Guitar Pedal, Optical Circuit with Attack/Release/Ratio/Tone Control & Bypass (SCYLLA R-27)" brand: "joyo" price: "฿8554" currency: THB in_stock: true reviews_count: 13 url: https://www.desertcart.co.th/products/543834055-joyo-bass-compressor-guitar-pedal-optical-circuit-with-attack-release store_origin: TH region: Thailand --- # Low-noise CMOS design with high dynamic range Optical compressor circuit for studio-grade transparency 6 precision knobs for ultimate tone control JOYO Bass Compressor Guitar Pedal, Optical Circuit with Attack/Release/Ratio/Tone Control & Bypass (SCYLLA R-27) **Brand:** joyo **Price:** ฿8554 **Availability:** ✅ In Stock ## Summary > 🎸 Elevate Your Bass Game with Transparent Compression That Commands the Stage ## Quick Answers - **What is this?** JOYO Bass Compressor Guitar Pedal, Optical Circuit with Attack/Release/Ratio/Tone Control & Bypass (SCYLLA R-27) by joyo - **How much does it cost?** ฿8554 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/543834055-joyo-bass-compressor-guitar-pedal-optical-circuit-with-attack-release) ## Best For - joyo enthusiasts ## Why This Product - Trusted joyo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Road-Ready Durability:** Rugged aluminum alloy chassis with true bypass relay switching and ambient LED lighting for pro-level reliability and style. - • **Noise-Free Performance:** Low-noise CMOS design paired with recommended isolated 9V power supply ensures crystal-clear, professional sound every time. - • **Six Knobs, Infinite Control:** Attack, Release, Ratio, Tone, Input & Output let you sculpt your perfect sound with surgical precision. - • **Versatile for All Instruments:** Optimized for bass but equally powerful on guitar, acoustic, and keyboards—your all-in-one compression solution. - • **Studio-Grade Optical Compression:** Experience smooth, musical compression that preserves your bass’s natural tone without squashing dynamics. ## Overview The JOYO SCYLLA R-27 Bass Compressor Pedal features a genuine optical compressor circuit prized for its smooth, transparent compression and low noise. Equipped with six precision knobs—Attack, Release, Ratio, Tone, Input, and Output—it offers unparalleled control over your dynamics and tone. Built tough with a rugged aluminum alloy case and true bypass relay switching, it’s designed for both studio and stage. While optimized for bass, its versatile circuit works seamlessly with guitars, acoustics, and keyboards. Powered by a 9V DC adapter (not included), the SCYLLA delivers professional-grade compression with a stylish ambient LED and a 1-year warranty, making it a must-have for discerning musicians seeking polished, dynamic sound. ## Description Crafted for guitarists who value classic sounds and unbeatable value, the JF Series delivers iconic tones that stand the test of time. R Series delivers versatile tones across all essential effects—distortion, overdrive, reverb, modulation, and more. Dr. J focuses on creating inspiring tones, and all pedals are strictly tested. For optimal performance and flexibility, this pedal is sold without a power adapter. This allows you to choose a high-quality power source that matches its specific needs. We Recommend: Using a power adapter that meets the pedal's voltage and current specifications for the cleanest, noise-free tone. Unplug Your Passion. Amplify Your Joy Support effect pedal App, 48V Phantom Power, 2 smartphones live streaming and recording at the same time. JOYO TECHNOLOGY is a professional company specializing in R&D, manufacturing and marketing digital products for music education. When you have any product issues, please enter your order details and feel free to send message to us via your order details, we would provide the items supports. Precise tone control by means of various different knobs. Freely adjust ratio, compression time, tone brightness and darkness. Compression tone by Independent footswitch control. Mini alloy case, Solid and durable, a long service life for practice, recording, outdoor playing. Power supply:DC 9V is NOT included in the package. Please select JOYO original power supply or other reliable brands to reduce noise and damage. Unique and innovative ambient light adds a stylish and popular element for guitarist's performance. Also, LED indicator shows the working status. R-27 SCYLLA is a Bass compressor, specially designed for bass, its circuit is designed to feature low noise and high dynamic control range during practicing, recording and performing. We can obtain various types of bass compression via the ATTACK/RELEASE/RATIO knobs. Meanwhile, The TONE knob retains note clarity and makes the tone stand out. R-27 SCYLLA R-04 ZIP AMP R-19 AVALLON JF-10 Dynamic Compressor Does this pedal work for Bass? Yes, of course. Designed for Bass, the R-27 SCYLLA, a compressor pedal, low noise and high dynamic. Does this pedal come with the power supply or adapter? No, both are not included. I highly recommend JOYO mutli-tipped 9V adapter and power supply with noise reduction technology. Because an incompatible power supply may cause the noise, pedal damage, can't turn on, powered but can't work properly. How to reduce noise from external equipment? Please check carefully before playing! 1.If the circuit shielded of electric guitar is bad, may cause the noise. 2.The amplifier without ground wire or Invalid connection. 3.Poor quality instrument cable and pickups cause noise, damage or no sound. What should we do if the pedal does not work? First, please read the instructions carefully. Then, check that the power supply is suitable. Secondly, check whether the product packaging is damaged. If you still have questions, please let me know by email. We will reply quickly within 24 hours! ## Features - OPTICAL COMPRESSOR CIRCUIT — STUDIO-GRADE TRANSPARENCY: The SCYLLA features a genuine optical compressor circuit using a light-dependent resistor (LDR) for smooth, musical compression that evens out dynamics without squashing your tone. Optical compression is prized in professional studios for its transparent, high-headroom response—controlling peaks and adding sustain while preserving your bass's natural character. Players describe the tone as "shockingly quiet"—a low-noise CMOS design that outperforms many compressors. - 6-KNOB PRECISION CONTROL — ATTACK, RELEASE, RATIO, TONE, INPUT & OUTPUT: Sculpt your perfect compression with six dedicated controls. ATTACK adjusts how quickly compression engages—fast for smoothing aggressive pick attack, slow to preserve punchy transients. RELEASE controls how long compression holds—short for tight, percussive playing, long for smooth sustain. RATIO sets compression intensity from subtle 2:1 to heavy limiting. TONE adds unique timbral flexibility—brighten for presence, or darken for a warmer thump. INPUT and OUTPUT provide precise gain staging for any bass, from passive single coils to active humbuckers. - BUILT FOR BASS — BUT VERSATILE FOR ALL INSTRUMENTS: While optimized for bass guitar, the SCYLLA's transparent optical circuit makes it equally capable with electric guitar, acoustic instruments, and even keyboards. Use it to tighten slap bass dynamics, smooth out fingerstyle passages, add sustain to clean leads, or control volume peaks in any signal chain. The subtle, musical compression won't color your core tone—it simply makes everything sound more polished and professional. - ROAD-READY R SERIES DESIGN: True bypass switching—confirmed by relay design—preserves your instrument's natural tone when the pedal is disengaged. Encased in a rugged aluminum alloy, the SCYLLA features the iconic R Series ambient LED lighting with 3 modes (Sync, Always On, or Off) via a recessed switch on the underside. The smooth, responsive chrome knobs and sturdy footswitch are built to withstand heavy stomping night after night. A subtle gain reduction indicator LED shows compression activity in real time. - JOYO QUALITY & AFTER-SALES CONFIDENCE: Backed by JOYO's decade-plus reputation for crafting innovative, budget-friendly gear. The SCYLLA is part of the R Series, built with upgraded precision components. Important: Powered by 9V DC adapter only (center negative, not included). Rated current: 100mA. Battery operation is not supported. For the quietest performance—especially with high-headroom optical circuits—use a regulated, isolated 9V power supply and avoid daisy-chaining with other pedals. Should any issues arise, please contact us through your desertcart order page. ## Technical Specifications | Specification | Value | |---------------|-------| | Amperage | 100 Microamps | | Asin | B0BZVQ2LFY | | Audio Output Effects | Compression | | Best Sellers Rank | 2,647 in Musical Instruments & DJ (See Top 100 in Musical Instruments & DJ) 1 in Bass Compression Effects | | Brand Name | JOYO | | Colour | Red | | Connector Type | 1/4-Inch Straight | | Controls Type | Knob | | Country Of Origin | China | | Customer Reviews | 4.4 4.4 out of 5 stars (176) 4.4 out of 5 stars | | Hardware Interface | 1/4-inch Audio | | Included Components | Power Supply (DC 9V, center negative) [Only] | | Item Dimensions | 10.9 x 6.7 x 4.8 centimetres | | Item Dimensions L X W X H | 10.9L x 6.7W x 4.8H centimetres | | Item Type Name | Bass Effects | | Item Weight | 240 Grams | | Manufacturer | JOYO Technology | | Manufacturer Part Number | 031-00R27-0010 | | Model Name | JOYO SCYLLA | | Model Number | 031-00R27-0010 | | Number Of Items | 1 | | Number Of Packs | 1 | | Power Source | Corded Electric | | Product Warranty | 1-year manufacturer warranty we stand behind the quality of our product. This warranty covers any manufacturing defects in materials or workmanship for one year from the date of purchase. If you encounter any issue, please contact us directly. We will provide a replacement, repair, or refund after we receive and verify the returned item. | | Signal Format | Analog | | Sound Profile | Transparent, smooth, high-headroom, low-noise | | Style | Bass,Compressor | | Voltage | 9 Volts (DC) | ## Product Details - **Brand:** JOYO - **Colour:** Red - **Item weight:** 240 Grams - **Product dimensions:** 10.9L x 6.7W x 4.8H centimetres - **Style:** Bass,Compressor ## Images ![JOYO Bass Compressor Guitar Pedal, Optical Circuit with Attack/Release/Ratio/Tone Control & Bypass (SCYLLA R-27) - Image 1](https://m.media-amazon.com/images/I/71QKFfx9M5L.jpg) ![JOYO Bass Compressor Guitar Pedal, Optical Circuit with Attack/Release/Ratio/Tone Control & Bypass (SCYLLA R-27) - Image 2](https://m.media-amazon.com/images/I/71LHjpNrf-L.jpg) ![JOYO Bass Compressor Guitar Pedal, Optical Circuit with Attack/Release/Ratio/Tone Control & Bypass (SCYLLA R-27) - Image 3](https://m.media-amazon.com/images/I/714tU7Dp-PL.jpg) ![JOYO Bass Compressor Guitar Pedal, Optical Circuit with Attack/Release/Ratio/Tone Control & Bypass (SCYLLA R-27) - Image 4](https://m.media-amazon.com/images/I/71gmq-kkyzL.jpg) ![JOYO Bass Compressor Guitar Pedal, Optical Circuit with Attack/Release/Ratio/Tone Control & Bypass (SCYLLA R-27) - Image 5](https://m.media-amazon.com/images/I/716ZXljR75L.jpg) ## Available Options This product comes in different **Color, Style** options. ## Questions & Answers **Q: Does this pedal work for Bass?** A: Yes, of course. Designed for Bass, the R-27 SCYLLA, a compressor pedal, low noise and high dynamic. **Q: Does this pedal come with the power supply or adapter?** A: No, both are not included. I highly recommend JOYO mutli-tipped 9V adapter and power supply with noise reduction technology. Because an incompatible power supply may cause the noise, pedal damage, can't turn on, powered but can't work properly. **Q: How to reduce noise from external equipment?** A: Please check carefully before playing! 1.If the circuit shielded of electric guitar is bad, may cause the noise. 2.The amplifier without ground wire or Invalid connection. 3.Poor quality instrument cable and pickups cause noise, damage or no sound. **Q: What should we do if the pedal does not work?** A: First, please read the instructions carefully. Then, check that the power supply is suitable. Secondly, check whether the product packaging is damaged. If you still have questions, please let me know by email. We will reply quickly within 24 hours! ## Customer Reviews ### ⭐⭐⭐⭐⭐ Compressor Review (RED) *by on Reviewed in the United Kingdom 22 May 2024* Believe the hype this works great. I was used to virtual studio compressors so when I bought a bass one, the Lax comp by Donner, I wasn't sure what to do and couldn't get a sound I like with just attack release and two volume controls. This having a ratio and tone function, in addition to it not having much of its own sound, unlike the LAX which makes the sounds it makes and not much else as far as I can tell, made it immediately more fun and understandable for me.So far I haven't had it for more than an hour but first impressions are very good.Normal size, massive value. ### ⭐⭐⭐⭐⭐ Arty *by on Reviewed in the United Kingdom 11 September 2026* Fine does thejob ### ⭐⭐⭐⭐ Try extreme settings to get a noticeable effect. *by on Reviewed in the United Kingdom 28 December 2023* So subtle with all controls turned to noon ie halfway that I thought I’d bought the emperors new clothes! Two things are important to say, firstly different bass guitars will definitely sound different with this gizmo, I tried it eventually with extreme settings on a fender jazz bass and it gave me a slowed percussive sound but on another more expensive active pickup bass there was a very slight effect with the same settings. That may be why different people will experience different outcomes and need different settings.Secondly the release control is a slow release turned fully anti-clockwise, try turning output gain to say 9 o’clock but input gain to fully clockwise ( ie all the input signal gets compressed) then turn all lower knobs fully clockwise except release which should be set fully anti clockwise. By following these settings you should hear the maximum compression this unit is capable of, after that dial back any knob to reduce the effect. It took me quite a while to find out the above and as I said before, up to that time I thought the thing wasn’t doing anything at all much except lower my overall volume quite a bit, to compensate for that I turned up the output gain bearing in mind that any high gain adds more distortion to the signal.Overall I was pleased with the effect of this pedal and somewhat relieved to find it had one! I think overall compression on stage is a bit overrated, for a pub band for example it’s probably unnecessary ( you won’t hear an appreciable difference) and for large venues it’s best left to the mixer out front. However if you want something subtle which seems to clean up the signal from the bass quite nicely then this particular compressor is a reasonable buy at a reasonable price.As an aside it might help if other reviewers mention which bass guitar they’re trying it out on as effects seem to vary a bit. ## Frequently Bought Together - JOYO Bass Guitar Pedals Compressor Effect Pedal with Precise Compression Knobs Low Noise and High Dynamic Control Range for Bassist Electric Guitar Bass (SCYLLA R-27) - JOYO DC 9V Guitar Pedal Power Supply (800mA -1A) AC Wall Charger Adapter with 4 Way Daisy Chain Pedal Cables (8.8 FT), Compatible for Most Effect Pedals (Tip Negative) - Amazon Basics 1/4 Inch Guitar Patch Auxiliary Cable, 6 Inch, 6-Pack, Black --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.th/products/543834055-joyo-bass-compressor-guitar-pedal-optical-circuit-with-attack-release](https://www.desertcart.co.th/products/543834055-joyo-bass-compressor-guitar-pedal-optical-circuit-with-attack-release) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-09-28*