MXR M-103
Professional music gear - detailed information and where to buy
MXR
M-103
Product Info
* Prices may vary. Check retailer for current pricing and availability.
The Blue Box is a character piece, plain and simple. It’s not your typical clean octave; the built-in distortion adds a snarling grit that's perfect for heavier rock, metal, or anyone wanting to add a truly unique, aggressive low-end to their tone. It’s a surprisingly versatile little box if you’re willing to experiment with the blend.
Product Description
MXR M-103, Bluebox Octaver
- A truly extraordinary effect by MXR. Basically
- the "Blue Box" is a kind of octaver
- but there is already the MXR Bass Octave. The Blue Box is more for people who prefer something special or anything else: the guitar signal is first distorted and then lowered by 2 octaves. The balance between the dry and the effect signal can now be adjusted. With a discreetly used effect more typical octaver sounds are possible
- especially if one plays rather high notes on the guitar; The higher the effect percentage increases
- the more natural it sounds. Try it out!
- Robust metal casing
- Slip resistant rubber pad
- Adds a two octave lower signal to the original signal
PROS
- • Unique distortion-octave blend creates a distinctive, aggressive low-end.
- • Adjustable dry/effect blend offers surprising versatility for subtle to extreme tones.
- • Robust metal housing and rubber pad ensure stage-ready durability.
- • MXR’s proven reliability and build quality provide long-term value.
CONS
- • The distortion character may not suit all playing styles or genres.
- • Limited control set compared to more complex multi-effect units.
- • The octave effect can sound muddy with lower-output pickups or poor EQ.
Product Video
Key Features
Effect Type
Distorted Octave
Controls
Blend (Dry/Effect), Octave Selector (Up/Down)
Bypass Type
True Bypass
Power Supply
9V DC (negative center), 2.1mm barrel jack
Connections
1/4 in Input, 1/4 in Output, 1/4 in DC Power
Dimensions
4.75 in x 1.75 in x 3.5 in
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Frequently Asked Questions
The Bass Octave is cleaner, whereas the Blue Box introduces a distinct distortion before the octave effect, making it much more aggressive.
Yes, but the effect is most noticeable and impactful with a slightly overdriven or distorted amp tone. The blend control lets you dial back the distortion, though.
It's a mid-focused, gritty distortion – not a smooth, warm overdrive. It leans towards a more aggressive, saturated character.
