MXR Micro Amp M133
Professional music gear - detailed information and where to buy
MXR
Micro Amp M133
Product Info
* Prices may vary. Check retailer for current pricing and availability.
The Micro Amp is a deceptively simple little box that does one thing exceptionally well: adds clean gain. It’s perfect for players who already love their amp’s core tone and just need a bit more headroom or a subtle edge for leads – think classic rock, blues, and even some country tones where you don't want to alter the fundamental amp character.
Product Description
MXR Micro Amp M133, Pedal Preamp
- Guitarists never tire of looking for more and more great pedals to tweak their distortion sound
- but what if the amp already sounds great but could do with a bit more gain? Overdrives and treble boosters would alter the frequency response - not desirable in this case. This is exactly where the MXR Micro has been just the thing for many years - without distorting the sound
- the amp gets exactly the kick it was missing; ideal for getting a powerful lead sound out of old Marshalls
- Fenders and Voxes without messing up their beloved characteristic sound.
- Adjustable boost
- Can equalise the different output of two guitars
- Prevents signal loss in long effects chains
- Gain control
- status LED
- Hardwire Bypass
- Sturdy metal housing
- Operation with optional 9V battery or optional 9V power supply - Art. #409939# (not included)
PROS
- • Robust metal housing provides excellent protection during gigging.
- • Hardwire bypass ensures true signal integrity, avoiding tone suck.
- • Gain control allows subtle boost or more aggressive preamp drive.
- • Ideal for vintage amps needing a little extra push without color.
CONS
- • Limited tonal shaping beyond gain; EQ is non-existent.
- • 9V battery operation can be inconvenient for frequent use.
- • Small footprint may be restrictive in cramped pedalboard setups.
Product Video
Key Features
Effect Type
Preamp Boost
Controls
Gain
Bypass Type
Hardwire
Power Supply
9V DC (optional battery or external power supply)
Connections
1/4 in Input, 1/4 in Output
Dimensions
4.75 in x 2.75 in x 1.75 in
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Frequently Asked Questions
It primarily shines with real amps, but can add some useful gain and perceived 'weight' to amp sims, though the effect is less pronounced.
It's more of a subtle boost; while it can add some drive, it's not designed for high-gain distortion and won't compete with dedicated overdrive pedals.
While it *can* technically be used to split a signal, it's not designed for that purpose and impedance mismatches might create unwanted noise or signal loss.
