Bass Compressor Guitar Pedal, Optical Circuit with Attack/Release/Ratio/Tone Control & Bypass (SCYLLA R-27)
*Price sourced from Amazon.com. Last updated 2026-07-22. Price and availability subject to change.
Bottom line: The Bass Compressor Guitar Pedal, Optical Circuit with Attack/Release/Ratio/Tone Control & Bypass (SCYLLA R-27) is a niche pick — read recent reviews before buying in the flight sim gear category, priced around $69.99. Read recent reviews carefully before committing.
SpecPicks Verdict
SpecPicks classifies JOYO Bass Compressor Guitar Pedal, Optical Circuit with… as a niche pick — read recent reviews before buying in the flight sim gear category, based on our editorial and benchmark analysis and our ranking model that weights rating × review-volume × price-fit. JOYO's positioning sits within the broader category mid-tier. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
Common buyer scenarios for flight sim gear of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Backed by JOYO's warranty and support channels
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key 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 Amazon order page.
Full Specifications
| Brand | JOYO |
|---|---|
| Color | Red |
| Style | Bass,Compressor |
| Voltage | 9 Volts (DC) |
| Amperage | 100 Microamps |
| Model Name | JOYO SCYLLA |
| Model Number | Manufacturer-JOYO-R27-0010 |
| Power Source | Corded Electric |
| Compatibility | Switch |
| Controls Type | Knob |
| Signal Format | Analog |
| Connector Type | 1/4-Inch Straight |
| Item Type Name | Bass Guitar Electronics |
| Item Dimensions | 4.29 x 1.89 x 2.64 inches |
Ready to buy?
JOYO Bass Compressor Guitar Pedal, Optical Circuit with Attack/Release/Ratio/Tone Control & Bypass (SCYLLA R-27) is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-07-22. Price and availability subject to change.
Related Flight Sim Gear
More guides & deep dives from the SpecPicks archive
Browse all articles & guides →- Best 1440p Gaming GPUs in 2026
- Best Budget Gaming PC Build 2026 — ~$1,000 ($800 on Sale)
- Best Retro Handhelds in 2026 — From $35 to $500
- RTX 4070 Super vs RX 7800 XT — Which to Buy in 2026
- How to Build a Windows 98 Retro PC in 2026
- The Complete Voodoo5 5500 AGP Driver Guide (2026 Edition)
- Emulation Hardware in 2026: FPGA, Software, and Cart-Reader Ecosystems
More reviews from the SpecPicks archive
Browse all reviews →- 'Count Anything' AI Model Does Object Counting — Harder Than It Sounds
- Ryzen 5 5600G vs Core i7-9700K for a Budget 1080p Gaming Build
- Athlon 64 + Radeon 9800 Pro Windows XP Build (2026 Revival): CompactFlash-to-IDE Boot Guide
- 8BitDo Sn30 Pro vs Pro 2: Best Bluetooth Controller for Raspberry Pi 4 Emulation
- Crucial BX500 vs Samsung 870 EVO: Best SATA SSD for Game Loads
- Ollama vs vLLM for Single-User Chat on an RTX 3060 in 2026
- DiffusionGemma Runs Locally: Google's Diffusion Text Model on a 12GB RTX 3060
- M5 vs DGX Spark vs Strix Halo vs RTX 6000: AI Workload Guide
- How to run Qwen 3 32B on AMD Radeon RX 7900 XTX
- Build a Home Assistant Smart-Home Hub on a Raspberry Pi 4 8GB in 2026
- Best CPU Cooler for Intel Core i7/i9 Builds in 2026
- Run Qwen Locally: Apple Silicon vs a 12GB RTX 3060 Rig in 2026
- llama.cpp vs Ollama vs vLLM on a 12GB RTX 3060: Which Wins in 2026?
- Quietest AM4 CPU Cooler in 2026: Noctua NH-U12S vs DeepCool AK620 vs AC Infinity
- LLM-Driven Driver Install on Windows 98: How Claude Walks Voodoo + Sound Blaster Setup
- Ollama vs llama.cpp on a 12GB GPU: Which Is Faster for Single-User Chat?
- Best Budget GPU for Running Llama 70B Locally: RTX 3060 12GB Stacked
- Resident Evil Code: Veronica on a CRT — Why It Still Hits Different
- Anthropic Raises $65B Series H Near a Trillion-Dollar Valuation: What It Means for Local-AI Builders
- OpenAI Codex Now Encrypts Agent-to-Agent Instructions: The Case for Local, Auditable Agents
- Building a Period-Correct 1999 Quake III Arena LAN Rig: Voodoo3, Pentium III, and Win98 SE
- First-Time CPU Delidding: What to Expect and How to Get It Right
- DeepSeek V4 on an RTX 3060 12GB: What Actually Fits Locally
- Best Storage for a Windows 98 Retro PC: CompactFlash vs IDE-to-USB SSD Adapters