MXR M133 Micro Amp
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When you need a little boost.
The MXR M-133 Micro Amplifier Pedal adds a preset amount of gain, using a single control. With a guitar, this lets you boost your signal for lead work, adjust between 2 different guitars with unmatched output (i.e., humbucker to single coils), or it can supply a permanent boost in a long effects chain where signal drop-off is a problem. Power: Single 9-volt battery or Dunlop ECB-003 AC Adapter - Controls: Footswitch toggles amp on/bypass (red LED indicates on) Gain knob adjusts total output volume when the Micro Amp is engaged.
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Trusted musician and artist reviews for MXR M133 Micro Amp
Based on 37 Reviews and 270 Ratings
Very Good When Used as a Clean Boost Pedal
It's worth noting that the Micro Amp is mainly useful in the context of playing live, specifically with a tube amplifier. It's not likely to add much to your solo practice or writing sessions (although if you practice or write at a fairly loud volume, you may find that stomping on this guy when you arrive at a song's solo section fattens your sound a lot, which can be very inspiring) and when used in conjunction with a solid state or hybrid amp, you're unlikely to really be able to take advantage of the M-133's ability to add searing gain to an already-saturated amp sound.
Therefore, please bear in mind that "live performance" is the perspective from which the rest of this review is written, as I have never bothered to use this pedal in a recording context--since two different guitar signals recorded on different tracks can be blended to taste during mixdown, with levels raised or lowered accordingly.
MXR/Dunlop initially marketed the Micro Amp as a mere volume boost, and it definitely does a great job as such. As mentioned earlier, activating on the pedal as you play introduces a boost that is as subtle or extreme as you want it to be; as an added bonus, I can attest that I've never noticed any coloration to my guitar tone when using the M-133. Other boost pedals often introduce a midrange "hump" that I, personally, usually don't mind. But it's nice to know I can use the MXR unit to get more of my sound, unadulterated.
A secondary function, per the manufacturer, is to slam the front end of a tube amplifier with extra volume to create even more saturated gain sounds than an amp is capable of producing on its own. Again, the M-133 Micro Amp excels at this, too.
Recently, MXR/Dunlop has been touting the pedal as a quick fix for guitarists who switch back and forth between, say, a Fender Stratocaster and a Gibson Les Paul during the course of a performance. Anyone who has utilized two instruments with different pickup configurations during the course of a single show is going to be... Read More
Best clean boost I've found so far!
If you need a clean boost for solos, this is the one to buy! Unless you feel the need to have some tone sculpting as well to make your leads cut a little more and want to buy the Micro Amp+, this is perfect!
Having the single, big dial makes for easy on-stage adjustments if you find it's not quite the right volume in the moment.
As with all MXR pedals, very sturdy and reliable.
What a great pedal!!!
Smooth, warm, and easy to use. Very helpful to give a punch in the mix to the guitar. Also if you're playing a solo it gives you a little bit of volume without adding gain, in case you put it after the gain pedals. If you put it before, this pedal makes you raise the gain of the pedal in the level you need. Also, it gonna makes you gain a lot of bit of punch in a tube amp. Simply a really great boost pedal.
edited 3 months ago
Bring your tone a little shine like a car wax
I got this pedal inspired by the equipboard of Caleb Followill from Kings of Leon, but also this site recommends this pedal. After testing the MXR Micro Amp with my pedalboard, I found that this pedal brings a little shine to the tone, so your sound will have a proper clarity. After the 12 o'clock, the MXR Micro Amp begins to bring overdrive to the amp, as the volume climbs up. At full range, you obtain a greatly overdrive increase (depending your amp will raise the volume or the gain). The dynamics in this pedal are awesome, it improves my playing a lot.
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Looking for a good all around clean boost well you're in the right ballpark
If you're looking for a clean boost in sound for just a little extra oomph then this could be a pedal for you its sturdy and does the job, but coming from mxr that would be just selling them short on their good quality products, now is it the most amazing pedal well for me no but that is not for me to decide but for you to go out and try it for yourself. I gave this a 4/5 because its a good pedal but nothing to really be blown away by its just a simple little pedal to do one thing and do it pretty well