MXR Micro Amp M133

Pedal Preamp

Guitarists never get tired of looking for ever-better pedals to achieve their perfect sound. But what if the amp actually sounds perfect, but needs just a bit more Gain? Overdrives and treble boosters would bend the frequency response which, in this case, is not desired. For precisely this, the MXR Micro has been the right thing for many years - without distorting the sound, the amp gets exactly the kick that was still missing; Ideal for bringing out the leading sound from old Marshalls, Fenders and Vöxen without distorting their beloved characteristic sound.

  • Adjustable boost
  • Perfect for switching between guitars with unmatched output
  • Great for use with long signal chains, or anytime signal drop-off is a problem
  • Knob for gain, status LED
  • Hardwire bypass
  • Sturdy metal housing
  • Operation via optional 9V battery or optional 9V power supply unit (available under article nr 409939)
  • Made in USA

Note: Register your purchase at www.w-distribution.de/Warranty for an extended warranty of 4 years.

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  • Blues Boost
  • Rock Boost

Further Information

Effect Types Preamp

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229 Customer Ratings:
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4.8 / 5.0
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132 written ratings Read all reviews
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Built to last!

21.04.2015
I'm writing this review now on 21st april 2015! I bought this pedal in July 2007! I still own it!

It has done me proud, never let me down and I highly recommend it to anyone and everyone. Such a simple piece of kit, one knob does it all and its perfect.

I used it in both my acoustic set up and my electric set up.

It runs on 9V or you can use a battery. I run it on the 9V as its requires unscrewing 4 screws to access the battery compartment.

So to summarise, having owned the pedal for 8 years, it is an excellent piece of gear for anyone wanting a boost. When you bring the knob up around 3 o'clock it adds a little gain but not too much to colour the sound, enough to boost your tone with a little added grit. I use it set at around 1 o'clock with the acoustic guitar to boost for solos and it sounds great.

This was my first purchase from Thomann and I have since come back many times. I would happily recommend both this product and the excellent service from Thomann!
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Just boost!

SachaS, 06.02.2015
I have a lot of overdrives on my board due to playing in covers band and the need for multiple different sounds. With a new project just started which sits on the heavier side of rock I realised a need for a final clean boost.

I got my first micro amp second hand recently and was so impressed that I've just bought this new one. I was so shocked at how neutral the boost was that I immediatly realised I needed one at the start of my chain as well as at the end.

I can now use single coils and humbucker equipped guitars in the same set and just use the micro amp at the start of my chain to level up the single coils without affecting the tone in any way. And with the one at the end it doesn't matter how many overdrives are on I still get a boost in volume without any added gain. Awesome!

I've got a Mooer pure boost in the middle of my board which does give a very clean boost but it has a slightly clinical sound when on which the micro amps don't.

All in, if you want a boost in volume or a single coil level adjustment both without any tone coloration buy one of these now! Or two like I did!
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