Rowin LEF-3807 Harmonizer Pedal Polyphonic Pitch Shifter Detune Effect True Bypass Compact Metal Guitar Stompbox

Product OverviewRowin LEF-3807 Harmonizer is a compact polyphonic pitch shifting stompbox built for guitar and bass players. Equipped with professional 32-bit floating-point DSP & 44.1kHz/24bit lossless sampling, it delivers three core creative pitch effects: natural harmony layering, precise standalone pitch shift, and warm detune chorus texture. It supports full chord polyphonic tracking without note dropout, covering a wide ±2 octave pitch range with multiple semitone interval options for rock, blues, progressive, ambient and experimental music. Tiny scratch-resistant zinc alloy housing saves valuable space on crowded pedalboards for studio recording, home practice and live stage gigs. Full true bypass hardwire circuitry fully retains your raw instrument tone with zero signal loss when the effect is disabled.This listing supplies 95% like-new units with flawless full functionality, only faint minor cosmetic scratches on housing, fully audio tested before shipment.Core Key Features3 Switchable Working Modes via 3-Way Toggle SwitchHarmony: Mix shifted harmony voice with dry original signal, create natural dual-layer harmoniesPitch Shift: Isolated pure pitch-shifted output for lead solos, without blending dry toneDetune: Micro fine pitch offset, thick warm chorus-like spacious ambient textureThree Independent Control KnobsDry: Adjust volume of original unprocessed guitar/bass signalWet: Control loudness of shifted harmony / detune effect signalRange: Select pitch interval from -2 octave up to +2 octave, includes 1/2/3/4/5/6/7/9 semitone stepsWide Detune Fine-Tune RangeIn Detune mode, adjustable micro pitch offset: -25/-20/-15/-10/-5/0/+5/+10/+15/+20/+25 cents for subtle thickeningStudio-Grade Polyphonic DSP Tracking32-bit floating-point processing, accurate full chord recognition without lag or note distortion100% True Bypass Circuitry3PDT hardwire signal path when bypassed, no tone coloration, zero signal attenuation or humDurable Mini Zinc Alloy HousingUltra-small footprint, lightweight shockproof shell, stable for frequent touring performancesVisible Stage LED IndicatorClear working status light visible under dim dark stage lightingStable Low Power Draw128mA working current, compatible with standard DC9V center-negative power supplyFull Technical SpecificationsModel: LEF-3807 HarmonizerBrand: RowinEffect Type: Polyphonic Pitch Shifter / Harmonizer / Detune PedalModes: Harmony / Pitch Shift / DetunePitch Range: ±2 Octaves, multiple semitone interval optionsDetune Micro Offset: -25 ~ +25 CentsSampling Rate: 44.1kHz, 24-bit, 32-bit Floating Point DSPInput Jack: 1/4” mono, Input Impedance: 470K OhmsOutput Jack: 1/4” mono, Output Impedance: 100 OhmsWorking Current: 128mAPower Supply: DC 9V, center-negative barrel plug (adapter NOT included)Material: Zinc Alloy Metal ChassisDimensions: 95mm (Depth) × 45mm (Width) × 53mm (Height)Net Weight: 203gPackage Total Weight: 278gCompliance Certifications: FCC VOC, CE EMC/LVD, RoHS CertifiedPackage Includes1 × Rowin LEF-3807 Harmonizer Pitch Shifter Pedal1 × English User Manual1. Manufacturer & Business Entity InfoBrand Name: RowinManufacturer Factory: Rowin Audio Equipment Factory, Dongguan City, Guangdong Province, ChinaUS Selling Entity: Sole Proprietor Local Warehouse Operator (Irvine, California)Main Products: Full lineup of mini single guitar effect pedals including harmonizer, octaver, delay, reverb, modulation, cabinet simulator, looper, tuner stompboxesService Support: Retail sales, small bulk wholesale, OEM private custom logo service for music instrument retailers worldwide2. Global Safety Compliance CertificationsFCC VOC (North American US Market): Compliant with US electromagnetic interference standards for audio electronic devicesCE Certification (EU & UK): EMC Electromagnetic Compatibility + LVD Low Voltage Safety DirectiveRoHS Compliance: Restricts hazardous heavy metals inside circuit boards & electronic components3. Product Safety PrecautionsPower SafetyOnly use regulated DC 9V center-negative power adapter with minimum 500mA output. Mismatched voltage or reversed polarity will permanently damage internal circuit boards. Unplug power supply when the pedal is unused or during thunderstorms to avoid surge voltage damage.Mechanical Operation SafetyDo not apply heavy force to footswitch, control knobs or audio jacks to prevent internal hardware failure. Unauthorized disassembly of the pedal housing will void the limited warranty.Cleaning & Storage RulesClean zinc alloy housing only with dry soft cloth; alcohol, chemical solvents, detergent or abrasive cleaners are strictly forbidden. Store pedals in cool dry indoor space, avoid long-term direct sunlight, humid air, violent vibration and heavy physical impact.Usage Environment WarningDo not operate this harmonizer pedal near water, rainy outdoor environments or high-power magnetic equipment to prevent audio signal distortion and short circuit risk.4. Warranty StatementEvery Rowin LEF-3807 pedal passes full audio function aging test before leaving factory. Our 95% like-new inventory comes with a 6-month manufacturer limited warranty against factory circuit and hardware defects. The warranty does NOT cover damage caused by improper power use, artificial disassembly, drops, water soaking or unauthorized circuit modification.