VSN LEF-3807 Harmonizer Pedal, Polyphonic Pitch Shifter Detune Effect True Bypass Compact Metal Guitar Stompbox--Shipped from Irvine Warehouse in California by USPS

Product Overview

VSN 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 Features

3 Switchable Working Modes via 3-Way Toggle Switch

Harmony: Mix shifted harmony voice with dry original signal, create natural dual-layer harmonies

Pitch Shift: Isolated pure pitch-shifted output for lead solos, without blending dry tone

Detune: Micro fine pitch offset, thick warm chorus-like spacious ambient texture

Three Independent Control Knobs

Dry: Adjust volume of original unprocessed guitar/bass signal

Wet: Control loudness of shifted harmony / detune effect signal

Range: Select pitch interval from -2 octave up to +2 octave, includes 1/2/3/4/5/6/7/9 semitone steps

Wide Detune Fine-Tune Range

In Detune mode, adjustable micro pitch offset: -25/-20/-15/-10/-5/0/+5/+10/+15/+20/+25 cents for subtle thickening

Studio-Grade Polyphonic DSP Tracking

32-bit floating-point processing, accurate full chord recognition without lag or note distortion

100% True Bypass Circuitry

3PDT hardwire signal path when bypassed, no tone coloration, zero signal attenuation or hum

Durable Mini Zinc Alloy Housing

Ultra-small footprint, lightweight shockproof shell, stable for frequent touring performances

Visible Stage LED Indicator

Clear working status light visible under dim dark stage lighting

Stable Low Power Draw

128mA working current, compatible with standard DC9V center-negative power supply

Full Technical Specifications

Model: LEF-3807 Harmonizer

Brand: VSN

Effect Type: Polyphonic Pitch Shifter / Harmonizer / Detune Pedal

Modes: Harmony / Pitch Shift / Detune

Pitch Range: ±2 Octaves, multiple semitone interval options

Detune Micro Offset: -25 ~ +25 Cents

Sampling Rate: 44.1kHz, 24-bit, 32-bit Floating Point DSP

Input Jack: 1/4” mono, Input Impedance: 470K Ohms

Output Jack: 1/4” mono, Output Impedance: 100 Ohms

Working Current: 128mA

Power Supply: DC 9V, center-negative barrel plug (adapter NOT included)

Material: Zinc Alloy Metal Chassis

Dimensions: 95mm (Depth) × 45mm (Width) × 53mm (Height)

Net Weight: 203g

Package Total Weight: 278g

Compliance Certifications: FCC VOC, CE EMC/LVD, RoHS Certified

Package Includes

1 × VSN LEF-3807 Harmonizer Pitch Shifter Pedal

1 × English User Manual

1. Manufacturer & Business Entity Info

Brand Name: VSN

Manufacturer Factory: VSN Audio Equipment Factory, Dongguan City, Guangdong Province, China

US 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 stompboxes

Service Support: Retail sales, small bulk wholesale, OEM private custom logo service for music instrument retailers worldwide

2. Global Safety Compliance Certifications

FCC VOC (North American US Market): Compliant with US electromagnetic interference standards for audio electronic devices

CE Certification (EU & UK): EMC Electromagnetic Compatibility + LVD Low Voltage Safety Directive

RoHS Compliance: Restricts hazardous heavy metals inside circuit boards & electronic components

3. Product Safety Precautions

Power Safety

Only 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 Safety

Do 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 Rules

Clean 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 Warning

Do 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 Statement

Every 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.