






🎸 Boost your tone, not your hassle — the Micro Amp that pros swear by!
The Jim Dunlop M133 MXR Micro Amp Pedal is a compact, analog preamp boost pedal designed to add a preset gain with a single knob. Ideal for balancing output between guitars or enhancing lead signals, it features a red LED on/off indicator and runs on a 9V battery drawing just 9mA. Made in Benicia, California, this pedal preserves your tone while delivering a clean, reliable boost favored by top guitarists.





| ASIN | B0006ZXFZQ |
| Amperage | 9 Milliamps |
| Audio Output Effects | Preamp |
| Best Sellers Rank | 35,226 in Musical Instruments & DJ ( See Top 100 in Musical Instruments & DJ ) 154 in Guitar Distortion & Overdrive Effects |
| Brand | MXR |
| Brand Name | MXR |
| Colour | White |
| Controls Type | Knob |
| Customer Reviews | 4.6 out of 5 stars 358 Reviews |
| Global Trade Identification Number | 00710137006607 |
| Hardware Interface | 1/4-inch Audio |
| Included Components | Dunlop ECB003 Power Adapter, 1 x 9V Battery |
| Item Dimensions L x W x H | 27.8L x 12.4W x 8.8H centimetres |
| Item Type Name | EQ Effects Pedal |
| Item Weight | 0.8 Pounds |
| Item height | 2.7 inches |
| Item weight | 0.8 Pounds |
| Manufacturer | Jim Dunlop |
| Power Source | Battery Powered |
| Product dimensions | 27.8L x 12.4W x 8.8H centimetres |
| Signal Format | Analog |
| Style | Compact |
| UPC | 962327363988 653078141993 710137006607 704660988240 |
| Voltage | 9 Volts |
R**N
MXR
This is an excellent pedal and great for boosting signal for riffs
M**T
Best clean boost pedal on the market
You really can't go wrong with this pedal, at the end of the day John Frusciante uses it and you can't really say much more than that. Simply put, it adds more 'meat' to your base tone, chords ring clearer and single notes sing longer and louder. Doesn't change your tone in any way per se, just somehow 'improves' it almost imperceptibly. It's a fairly subtle effect for the price admittedly, but in my opinion entirely worth it!
J**.
An effect which gets straight to the point!
MXR don’t disappoint, this is another well built, no nonsense piece of kit. It boosts your signal just as it should, with no added noise . It’s small, powerful and simple to operate, they’ve been around a long time, there’s a reason for that!
R**N
Epic clean boost switch
Fantastic piece of kit... used in effect loop it gives enormous amounts of boost with negligible colouring of sound.
J**E
Preamp or no preamp
This effect seems to be quite subtle at first but I can imagine after prolonged use it becomes indispensable...
P**L
Classic pedal, great boost
Used this into my Marshall dsl20cr to push the tubes a bit without more volume. Does the job well
A**Y
Great pedal, nearly always use this
Great pedal, nearly always use this, provides a nice boost and does not lose any clarity to the sound (if anything, makes it clearer).
C**Y
Class pedal
Makes a substantial difference and you can get some very dirty, fuzz sounds from this pedal
Trustpilot
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