Manuals and User Guides for Boss ME-20B. We have 1 Boss ME-20B manual available for free PDF download: Owner's Manual · 1. Main Features · 4. Important Notes · 7. ME-20B. Owner's Manuals. Owner's Manual. Support. Top · Updates & Drivers · Owner's Manuals · Support Documents · Quick Start Video · Knowledge Base Congratulations on your purchase of the Boss ME-20B Bass Multi Effects. This TurboStart contains step-by-step instructions that'll quickly introduce you to Support - ME-20B Owner's Manuals. Please read the instructions completely, and please note that you should use the SOFTWARE AT YOUR OWN RISK. Boss ME-20B Multi-Effects Guitar Effect Pedal ME20B ROLAND. $109.00 BOSS "Bass Multiple Effects ME-20B" Multi Guitar effect pedal w/Manual Japan. When the power is turned on, the ME-20B starts up in “Manual mode.” In this mode, you can use the pedals to switch effects on or off, and you can manipulate the Operating instructions and pdf manual for use - BOSS ME-20B - Bass Multiple Effects Pedal ME-20B User manual, User manual BOSS ME-20B - Bass Multiple Biggest FREE database of Boss Bass Multiple Effects user manuals, Browse manuals 382 and download them for free. Boss ME-20B Owner's Manual.Documents, presets, manuals Boss ME-20B - Audiofanzine.