JOYO

Bass Compressor Guitar Pedal, Optical Circuit with Attack/Release/Ratio/Tone Control & Bypass (SCYLLA R-27)

Name: JOYO Bass Compressor Guitar Pedal, Optical Circuit with Attack/Release/Ratio/Tone Control & Bypass (SCYLLA R-27)
Brand: JOYO
SKU: B0BZVQ2LFY
Price: 55.99 USD
Availability: InStock

By SpecPicks Editorial · Verified 2026-07-22

$55.99

Buy on Amazon — $55.99 Compare to similar retro graphics cards

*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 retro graphics cards category, priced around $55.99. 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 retro graphics cards 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 retro graphics cards 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.

Check price on Amazon →

*Price sourced from Amazon.com. Last updated 2026-07-22. Price and availability subject to change.