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JOYO Analog Distortion Guitar Pedal, FAT/MOSFET Toggle with DISTORTION/FILTER/VOLUME Control, True Bypass (SPLINTER JF-21)
JOYO

JOYO Analog Distortion Guitar Pedal, FAT/MOSFET Toggle with DISTORTION/FILTER/VOLUME Control, True Bypass (SPLINTER JF-21)

Mike Perry has researched PC hardware since 2014, tracking 80+ GPU generations, 50+ retro handheld platforms, and 30+ vintage PC configurations. He synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

$39.99

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*Price sourced from Amazon.com. Last updated 2026-08-26. Price and availability subject to change.

Bottom line: The JOYO Analog Distortion Guitar Pedal, FAT/MOSFET Toggle with DISTORTION/FILTER/VOLUME Control, True Bypass (SPLINTER JF-21) is a niche pick — read recent reviews before buying in the retro graphics cards category, priced around $39.99. Compare close alternatives before committing.

SpecPicks Verdict

SpecPicks scored JOYO Analog Distortion Guitar Pedal, FAT/MOSFET Toggle with… using a rating × review-volume × price-fit model applied to our editorial and benchmark analysis across the retro graphics cards category. JOYO's retro graphics cards lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Mixed or limited buyer feedback at this price point — focus your evaluation on recent reviews that specifically address build quality and long-term reliability, and shortlist one or two close alternatives before deciding.

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

  • CLASSIC ANALOG DISTORTION — FUZZ & DISTORTION HYBRID TONE: The SPLINTER delivers a thick, saturated distortion tone through an all-analog design, blending elements of fuzz and distortion for a uniquely aggressive voice. From tight, articulate crunch to raw, roaring fuzz, the pedal covers the full spectrum of gritty, grungy tones with a touch-sensitive dynamic response that reacts naturally to picking attack and guitar volume adjustments. Players describe the sound as having "a great edge of breakup sound" and appreciate its versatility across a wide range of playing styles.
  • FAT & MOSFET TOGGLE SWITCHES — TWO UNIQUE VOICINGS: Two independent toggle switches provide additional tonal flexibility. The FAT switch adds thick, powerful low frequencies, suitable for heavy riffs and filling out single-note solos with a fuller presence. The MOSFET switch engages germanium diode clipping for a softer, more vintage feel with smoother compression, ideal for classic rock, blues, and dynamic lead playing. When MOSFET is off, the pedal uses silicon diode clipping for a brighter, more aggressive modern edge. Note: the difference between MOSFET and Stock clipping is most noticeable at higher DISTORTION settings; at lower gain, the differences become more subtle.
  • 3-KNOB CONTROL — DISTORTION, FILTER & VOLUME: Sculpt your signature distortion tone with three intuitive controls. DISTORTION sweeps from subtle, edge-of-breakup grit to full-on, saturated fuzz. Start around 9 o'clock for tight crunch, push past noon for aggressive metal, or max it out for raw, roaring fuzz. The FILTER knob is a powerful tone-shaping tool—turn it clockwise to roll off high frequencies for a darker, smoother voice, or counter-clockwise for a brighter, more cutting presence. VOLUME adjusts overall output from unity gain to a boost that can push your amp into natural overdrive.
  • SOCKETED OP-AMP CHIP FOR CUSTOMIZATION: Unlike most distortion pedals that lock into a fixed sound, the SPLINTER features a socketed OP07DP op-amp chip that can be easily swapped for other popular chips to fine-tune tone. Different op-amps produce slightly different gain structures, compression characteristics, and harmonic content. Players confirm the JOYO version is "more responsive to the OpAmp changes in a way that you can actually hear." Note: opening the pedal to swap chips will void the warranty. Please ensure you are satisfied with the stock sound before attempting any modifications.
  • JOYO QUALITY & AFTER-SALES CONFIDENCE: Backed by JOYO's decade-plus reputation for crafting innovative, budget-friendly gear that punches far above its weight. Encased in a rugged aluminum alloy. Dual power options: use a standard 9V 6F22 battery (not included) for grab-and-go portability, or a 9V DC adapter (center negative, not included) for consistent power. Rated current: just 20mA—exceptionally power-efficient for extended battery life. For the quietest performance—especially with high-gain analog distortion 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

BrandJOYO
ColorCyan
StyleFilter,Distortion
Voltage9 volts_of_direct_current
Amperage20 microamps
Set NameFilter,Distortion - Cyan
Model NameJOYO Splinter
Model NumberManufacturer-JOYO-JF21-0010US
Power SourceCorded Electric,Battery Powered
CompatibilitySwitch
Controls TypeKnob
Signal FormatAnalog
Connector Type1/4-Inch Straight
Item Type NameElectric Guitar Electronics
Item Dimensions4.72 x 3.86 x 2.17 inches
Number of Items1
Number of Packs1
Hardware Interface1/4-inch Audio
Included Components1 x user manual
Audio Output EffectsDistortion,Compression

Ready to buy?

JOYO Analog Distortion Guitar Pedal, FAT/MOSFET Toggle with DISTORTION/FILTER/VOLUME Control, True Bypass (SPLINTER JF-21) is sold on the used and vintage market, where eBay carries the live inventory — Amazon does not stock this part. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

See live eBay listings →

*Price sourced from Amazon.com. Last updated 2026-08-26. Price and availability subject to change.

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