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MXR M133 Micro Amp Gain / Boost Pedal , $105.99 - Add to Cart Skip to Product Information

MXR M133 Micro Amp Gain / Boost Pedal

Gain Boost Pedal with Level Control, LED indicator, and Footswitch
MXR M133 Micro Amp Gain / Boost Pedal
MXR M133 Micro Amp Gain / Boost Pedal

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MXR M133 Micro Amp Gain / Boost Pedal
In Stock!

Only 8 left in stock! More on the way.

Take Control of Your Guitar Rig's Gain Levels!

The MXR Micro Amp level booster pedal lets you take control of your volume level before your signal goes to the amp! Boost your signal for leads and switch it on when you need it. Use the Micro Amp to match the output levels of your humbucker-equipped guitar and your single-coil axe. Push your tube amp into that golden tone zone. If you use several pedals, this handy unit lets you bring your signal back up to the level you need before it goes to the amp. Give your rig a boost — use the Micro Amp!

MXR Micro Amp Level Booster Pedal Features:
  • Footswitch toggles amp on/bypass
  • Red LED indicates "on"
  • Gain knob adjusts total output volume when micro amp is engaged
  • Power: Single 9-volt battery or Dunlop ECB-003 AC adapter (sold separately)
  • Tough, compact metal enclosure
The MXR Micro Amp puts your guitar and pedal volume levels right at hand!

Warranty Info

Sweetwater's FREE 2-Year Total Confidence Coverage Warranty

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  • Get back to making music with the industry's fastest turnaround time
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Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.