---
product_id: 543834055
title: "Bass Compressor Guitar Pedal, Optical Circuit with Attack/Release/Ratio/Tone Control & Bypass (SCYLLA R-27)"
brand: "joyo"
price: "R$1419"
currency: BRL
in_stock: true
reviews_count: 13
category: "Joyo"
url: https://www.desertcart.com.br/products/543834055-bass-compressor-guitar-pedal-optical-circuit-with-attack-release-ratio
store_origin: BR
region: Brazil
---

# 3-mode ambient LED lighting for stage presence True bypass with relay for pure signal path 6 precision knobs for ultimate tone control Bass Compressor Guitar Pedal, Optical Circuit with Attack/Release/Ratio/Tone Control & Bypass (SCYLLA R-27)

**Brand:** joyo
**Price:** R$1419
**Availability:** ✅ In Stock

## Summary

> 🎸 Elevate your bass game with studio-grade clarity and pro-level control!

## Quick Answers

- **What is this?** Bass Compressor Guitar Pedal, Optical Circuit with Attack/Release/Ratio/Tone Control & Bypass (SCYLLA R-27) by joyo
- **How much does it cost?** R$1419 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/543834055-bass-compressor-guitar-pedal-optical-circuit-with-attack-release-ratio)

## 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 chrome knobs and a relay-based true bypass switch built to withstand heavy gigging.
- • **Tailor Your Tone with 6 Knobs:** Attack, Release, Ratio, Tone, Input & Output controls let you sculpt everything from subtle sustain to aggressive punch.
- • **Versatile for All Instruments:** Optimized for bass but perfect for guitar, acoustic, and keyboards—polish your sound across any setup.
- • **Studio-Grade Optical Compression:** Experience smooth, transparent dynamics with a professional LDR circuit that preserves your bass’s natural tone without noise.
- • **Stylish & Functional LED Ambience:** Iconic R Series ambient lighting with Sync, Always On, or Off modes adds a modern visual edge to your pedalboard.

## Overview

The JOYO SCYLLA R-27 Bass Compressor pedal features a genuine optical compressor circuit prized for its transparent, low-noise compression. Equipped with six precision knobs—Attack, Release, Ratio, Tone, Input, and Output—it offers unparalleled control over your dynamics and tone. Built in a rugged aluminum alloy enclosure with true bypass relay switching and ambient LED lighting, this pedal is designed for both studio and stage. Optimized for bass but versatile enough for other instruments, it delivers professional compression performance at an unbeatable price point.

## Description

Product Description aplus content video JOYO R-27 SCYLLA Details High precision control Precise tone control by means of various different knobs. Freely adjust ratio, compression time, tone brightness and darkness. Easy to use Compression tone by Independent footswitch control. Mini alloy case, Solid and durable, a long service life for practice, recording, outdoor playing. Power supply tip 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. Ambient LED light Unique and innovative ambient light adds a stylish and popular element for guitarist's performance. Also, LED indicator shows the working status. Specification Low Noise and High Dynamic Bass Compressor Guitar Pedals 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. Recommended Combination of Pedals 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 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. 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. 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! 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!

Review: Compressor Review (RED) - 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.
Review: As Good As You'll Find - At this price point I don't think you'll find a better compression pedal. I've tried more than a few over the years and this is better than the cheap ones and as good as the high end ones. It isn't entirely transparent unless you leave the tone control alone. It adds sparkle one way, a Jamerson thump the other. There is great flexibility across the controls and yet I found it very simple to dial in a nice, tight sound. Don't be fooled by the price - this is a great compressor.

## 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 |
|---------------|-------|
| ASIN | B0BZVQ2LFY |
| Amperage | 100 Microamps |
| Audio Output Effects | Compression |
| Best Sellers Rank | 2,468 in Musical Instruments & DJ ( See Top 100 in Musical Instruments & DJ ) 1 in Bass Compression Effects |
| Brand | JOYO |
| Brand Name | JOYO |
| Colour | Red |
| Connector Type | 1/4-Inch Straight |
| Controls Type | Knob |
| Country of Origin | China |
| Customer Reviews | 4.3 out of 5 stars 164 Reviews |
| Hardware Interface | 1/4-inch Audio |
| Included Components | Power Supply (DC 9V, center negative) [Only] |
| Item Dimensions | 10.9 x 4.8 x 6.7 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 |
| Item weight | 240 Grams |
| Manufacturer | JOYO Technology |
| Manufacturer Part Number | 031-00R27-0010 |
| Model Name | JOYO SCYLLA |
| Model Number | Manufacturer-JOYO-R27-0010 |
| 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. |
| Product dimensions | 10.9L x 6.7W x 4.8H centimetres |
| 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 7.2W x 4.8H centimetres
- **Style:** Bass,Compressor

## Images

![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)

## Available Options

This product comes in different **Colour Name, Style Name** 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 J***B on 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.

### ⭐⭐⭐⭐⭐ As Good As You'll Find
*by B***H on 22 August 2023*

At this price point I don't think you'll find a better compression pedal. I've tried more than a few over the years and this is better than the cheap ones and as good as the high end ones. It isn't entirely transparent unless you leave the tone control alone. It adds sparkle one way, a Jamerson thump the other. There is great flexibility across the controls and yet I found it very simple to dial in a nice, tight sound. Don't be fooled by the price - this is a great compressor.

### ⭐⭐⭐⭐ Excellent value bass compressor
*by G***R on 5 March 2026*

Great transparent bass compressor - takes a little time getting used to the attack and release but very much worth the money.

## 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.com.br/products/543834055-bass-compressor-guitar-pedal-optical-circuit-with-attack-release-ratio](https://www.desertcart.com.br/products/543834055-bass-compressor-guitar-pedal-optical-circuit-with-attack-release-ratio)

---

*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-08-15*