Updated 7 May 2026
| Brand | MXR |
| Category | Guitars |
| Available at | 2 UK stores |
| 90-day avg | £98.96 |
MXR
MXR M133 Micro Amp booster pedal
£83.00£124.00↓ 33% offStrong Buy
Cheapest at Bax · 2 stores
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PRICE HISTORY
Current
£87
Change
+15.0%
Avg
£82
Low
£75
High
£87
Volatility
4.0%
PRODUCT DESCRIPTION
- The XR M133 Micro Amp has a simple yet practical function: amplifying your guitar signal. This guitar pedal has a gain rotary knob that you can set at a certain volume, just before a gig, for instance. When the solo starts you can switch on the M 133 Micro Amp booster and your sound will rise above the sound of rest of the band. You can also use this solid stomp box for switching between two guitars with different output volumes or at the end of a long row of sound-consuming effect pedals.