This pedal can be powered by a 9-volt battery, a Dunlop ECB003 9-volt adapter, or the DC Brick™, Iso-Brick™, and Mini Iso-Brick™ power supplies (not included).
Get your sound up to 11 with the MXR M133 and turn up the fun!

The MXR M133 Micro Amp Gain Boost Effects Pedal is here to make your playing louder, richer, and more dynamic. With an adjustable output level, it’s like having your own personal sound technician in tow, ready to get your tone pumping with a cheeky twist.
This pedal can be powered by a 9-volt battery, a Dunlop ECB003 9-volt adapter, or the DC Brick™, Iso-Brick™, and Mini Iso-Brick™ power supplies (not included).
Get your sound up to 11 with the MXR M133 and turn up the fun!
Original: $116.83
-65%$116.83
$40.89Product Information
Shipping & Returns
The MXR M133 Micro Amp Gain Boost Effects Pedal is here to make your playing louder, richer, and more dynamic. With an adjustable output level, it’s like having your own personal sound technician in tow, ready to get your tone pumping with a cheeky twist.
This pedal can be powered by a 9-volt battery, a Dunlop ECB003 9-volt adapter, or the DC Brick™, Iso-Brick™, and Mini Iso-Brick™ power supplies (not included).
Get your sound up to 11 with the MXR M133 and turn up the fun!
Original: $116.83
-65%$116.83
$40.89