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Item # 151107 | Customer Ratings: Ratings ( 4 Based on 17 reviews)

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MXR M-103 Blue Box
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      MXR M-103 Blue Box (151107)
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This unassuming little box shovels out enough low frequencies to scare a blue whale.

The MXR Blue Box takes your guitar signal, fuzzes it up, then duplicates it 2 octaves down. You control the output and the mix between the dry signal and the effect. Using it 100% wet is quite an experience, but more recognizable sounds appear as you dial in more dry signal. The Blue Box is known for having a chaotic personality that can make each session a totally unique experience!

Here are just some of the people who are using this box: John 5 - Rob Zombie; Mick Thompson - Slipknot; Munky - Korn; Jimmy Page; Tim Skold - Marilyn Manson; Jay Baumgardner - Producer Zakk Wylde; Geordie White - A Perfect Circle.

MXR M-103 Blue Box Features:

  • Power: Single 9 volt battery or Dunlop ECB-003 AC adapter

    Controls: Footswitch toggles effect on/bypass (red LED indicates on)
    Output knob sets total output gain
    Blend knob adjusts ratio of dry (clean) with wet (effects) signal




MXR M-103 Blue Box

All pedals - one year parts and labor 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 17 reviews)
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Viewing Reviews 1 - 3 of 17 |
  • Adds personality to your sound

    As reviewed by Leo on 1/20/2010

    Great effect, with this pedal you're gonna be recognized and remembered everywhere you'd been. Me, I use in most of my songs when playing some intros and licks, and people come ask me how did I make my guitar sound as deep.. Use the blend knob at 3 o' clock position, and how it sounds with that fuzz 2 octaves down!

    7 of 7 people found this review helpful.
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  • It does what it does

    As reviewed by Mike W on 6/29/2011

    Listen to Jimmy Page's solo on Led Zeppelin, Fool in the Rain, if you want to know what this thing does. It's a one trick pony but it is a unique arrow in any guitarist quiver. It's part of my "toolbox." I've used it with good results on a few tunes in the studio. It does what it's suppose to do. Is it "good?" Well, like I said, listen to Page's solo. If that's what you want, that's what you'll get.

    1 of 1 people found this review helpful.
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  • MXR M103 BLUE BOX

    As reviewed by riffman on 4/2/2009

    Well made unit simple. I would only recomend this pedal to those who want a little something extra to throw in the mix once in a while . It is probably not the most used effect on my board but it has a place .

    1 of 1 people found this review helpful.
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