Guitar Multiple Effects

Performance-Based Effects for Guitar


Please check the latest ME-25 featuring Powerful COSM amp models, SOUND LIBRARY, SUPER STACK, Phrase Loop function, and more!

Performance-Based Effects for Guitar

From the smallest compact pedal to the most feature-laden rack, the BOSS brand is synonymous with effects that sound great and are built to last. Today BOSS expands its famous ME series multi-effects family with the ME-20, a powerful multi-effects unit optimized for live performance. Easy to use and road tough, the ME-20 provides world-class overdrive, distortion, delay, chorus, phaser, flanger, tremolo, rotary, and EQ effects, taking BOSS’s performance-based philosophy to a very affordable price point.

Check out the audio samples of the 30 factory preset patches!

  • - Performance-based guitar processor for the player who wants an ultra-easy interface with BOSS tone and quality
  • - New super-tough metal chassis with 3 footswitches, 5 realtime control knobs, and expression pedal
  • - EZ Edit for quick sound creation
  • - OD/DS Solo function for punchy and high-impact lead tone
  • - 30 user memory locations in addition to realtime operation
  • - Battery or AC powered
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Simple Operation — Works Like Compact-Pedal Effects

To get the sound you want, simply select an effect and tweak it using the knobs. Turn the ME-20 on, and it’s just like having three BOSS compact-pedal effects side by side. No menus to navigate, no nonsense — it’s fast, easy, fun, and yet powerful.

Famous BOSS sound

The ME-20 provides world-class overdrive, distortion, delay, chorus, phaser, flanger, tremolo, rotary, and EQ effects — all instantly customizable.

OD/DS Solo Function

Give distortion sounds clarity and an intense boost with a simple button press. The first of the three footswitches on the ME-20 is devoted to overdrive and distortion effects. You can also switch the effect on/off via pedal or an external switch (BOSS FS-5U) — great for instantly activating a "biting lead" tone.

EZ EDIT for Quick Sound Creation

EZ EDIT lets you create sounds quickly and intuitively, with incredible ease and speed like no other multi-effects unit on the market. You can adjust a combination of effect parameters with a single knob, and then save your creations for instant recall.

Memory Function

Up to 30 of the sounds you create can be stored in the ME-20’s User memory. In Memory mode, you can use the pedals to instantly select a stored sound. Since the ME-20 makes it so easy to create new sounds, the user memory bank ensures that you’ll never lose those perfect patches.


Plug a CD or MP3 player into this input jack and jam along with your favorite music. It’s also a great way to plug in and play along with your favorite guitar heroes to help build and strength your chops.

Battery Powered Operation

The ME-20 runs on battery power (six AA dry cells) so you can use it anywhere. Wherever you travel, the ME-20 goes with you and never requires an additional AC outlet. For those who want to plug in, however, an optional AC adaptor can be used.

AD Conversion
24-bit + AF method (*)
DA Conversion
Sampling Frequency
44.1 kHz
30 (user)
Nominal Input Level
INPUT: -10 dBu, AUX IN: -18 dBu
Input Impedance
INPUT: 1 M ohm, AUX IN: 22 k ohms
Nominal Output Level
-10 dBu
7 segments, 2 characters LED
OD/DS/1 pedal, MOD/2 pedal, DELAY/3 pedal, Expression pedal
INPUT jack (1/4 inch phone type), AUX IN jack (Stereo miniature phone type), OUTPUT jacks L/MONO, R (1/4 inch phone type), PHONES jack (Stereo 1/4 inch phone type), FOOT SW jack (1/4 inch TRS phone type), AC Adaptor jack
Power Supply
DC 9 V: Dry battery LR6/R6 (AA) type x 6, AC Adaptor (PSA series: Optional)
Current Draw
90 mA * Expected battery life under continuous use: Alkaline: 13 hours, Carbon: 3.5 hours (These figures will vary depending on the actual conditions of use.)
Owner's Manual, Dry battery LR6 (AA) type (alkaline) x 6, Roland Service (Information Sheet)
AC Adaptor: PSA series, Footswitch: FS-6, FS-5U, Connection Cable: Roland PCS-31 (Stereo 1/4 inch phone plug - 1/4 inch phone plug x 2)

Size and Weight

Width (W)
294 mm11-5/8 inches
Depth (D)
179 mm7-1/16 inches
Height (H)
54 mm2-1/8 inches
1.6 kg3 lbs. 9 oz.

(*) AF method (Adaptive Focus method) This is a proprietary method from Roland that vastly improves the signal-to-noise (S/N) ratio of the A/D and D/A converters

All specifications and appearances are subject to change.


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