Item # 102539657 | Customer Ratings: ( 5 Based on 16 reviews)

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Boss ME-50B Bass Multiple Effects with COSM
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A bass player's dream come true!

The BOSS ME-50B Bass Multiple Effects with COSM puts world-class bass effects in a rugged floor unit with easy pedal-style control. Effects are divided into 6 sections (Compressor/Limiter, Master EQ, Filter/Tone, Drive/Synth, Delay/Modulation, and Expression Pedal), giving bassists a range of unique and powerful tones including new effects like Sound Hold, Octave Up, and Kick Drum-all with easy knob-based control.

Boss ME-50B Bass Multiple Effects with COSM Features:

  • Floor bass multi-effects processor with super easy, knob-based controls
    Killer COSM Compressor/Limiter and Drive effects, plus T-Wah, Slow Gear, Defretter, and much more
    Innovative Sound Hold function sustains a low note while playing over it
    Sound-on-sound recording with new Kick Drum effect for keeping time
    Dedicated knobs for each effect section—no menu-surfing!
    Easy Tone effects with preset EQ templates for quick tone editing
    3 footswitches and onboard expression pedal for easy realtime control

Boss ME-50B Bass Multiple Effects with COSM

Boss pedals - 5 year parts warranty
90 day labor warranty.
1 year warranty - Multitracks, Jamstations, etc.
Check with manufacturer for specific product warranty.

Get your gear covered!

Now you can get added warranty protection for your new gear. Pro Coverage steps in where the manufacturer's "normal wear and tear" ends. Our PRO COVERAGE program offers you UPGRADED COVERAGE if your product ever fails!

Pro Coverage includes:

  • Accidental damage protection (new gear only)
  • Expedited Repair
  • Free Shipping (for returns or repairs)
  • 100% Coverage for Commercial Use
  • Extended Return Period
  • Extended Price Protection
  • No Lemon Guarantee
  • Free Transfer of Coverage to a new owner
  • Repair Costs Covered for up to 3 years from date of purchase
  • Repairs Can Be Authorized Toll-Free by Phone or the via the web
Product Reviews
(Based on 16 reviews)
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  • Solid effects board

    As reviewed by Bill on 11/28/2009

    Just bought my ME-50B last week and I'm absolutely in love with it. Even if you aren't into all sorts of crazy effects, this is still an investment worth considering if only for the compressor and filter settings (compressor + defretter = amazingly smooth and rich clean tone). Throw on the chorus+delay setting and you've got the perfect tone for melodic solo bass work. My only complaint is the limited battery life (12 hours for 6 AA batteries), but everything else about the ME-50B is good in my book.

    15 of 15 people found this review helpful.
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  • BOSS ME-50B

    As reviewed by Van on 2/18/2010

    Very pleased with this unit, clean sounds and feels very durable.Only complaint is that u need and additional pedal to switch banks when you create you own patchs.

    8 of 8 people found this review helpful.
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  • Great Product!

    As reviewed by The People in The Windows on 11/20/2008

    I just got mine today and I am absolutely in love with it!. Synth selections are amazing and the Expression pedal tops the whole thing off. Unlike the ME-20B their are no dumb menus to go through just some knobs. I also was pleased by the chorus, delay, reverb, phaser, flanger, T. Wah, and the drive/distortion selections. Some flaws are some feed back on combinations of pedals and the lack of an included PSA adapter. Otherwise great all around product.

    8 of 8 people found this review helpful.
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PO Box 4769
Westlake Village, CA 91359
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