
Anthony Easton
The MXR M133 Micro Amp is a versatile pedal designed to provide a precise amount of gain boost, with a maximum gain of up to +26dB. It is suitable for various use-cases, including boosting the signal for lead work, compensating for unmatched output between different guitars, and maintaining a consistent signal level in long effects chains.
Key Specifications:
- Input Impedance: 1 MΩ
- Output Impedance: 470 Ω
- Maximum Output Level: +6 dBV
- Noise Floor: -80 dBV
- Gain Control: +0.5 dB to +26 dB
- Frequency Response: 20 Hz to 20 kHz, +0 dB, -1.4 dB
- Bypass: Hardwire
- Current Draw: 2.5 mA
- Power Supply: 9 volts DC
The pedal can be powered by a 9-volt battery, a Dunlop ECB003/ECB003E 9-volt adapter, or a power supply such as the DC Brick™, Iso-Brick™, and Mini Iso- Brick™ (not included).
The MXR M133 Micro Amp is a compact and reliable solution for musicians seeking a precise and powerful signal boost for their performances and recordings.
Watch the latest video demos and reviews for the Micro Amp from YouTube. Stompbx updates this every six months to reflect the most popular reviewers and guitar pedal demos for each pedal.

Below are live Reverb listings for the MXR Micro Amp from Reverb. Stompbx automatically aggregates current offers to give you a quick look at available models, conditions, and prices. Perfect for comparing options and making an informed purchase.

Brand New
$183.61

Brand New
$113.55

Very Good
$75

Brand New
$121.91

Very Good
$69

Very Good
$69

Brand New
$105.99

Brand New
$165.03

Browse through eBay listings for the Micro Amp compiled in real-time. From vintage finds to brand-new units, see a variety of purchasing options. This automated collection helps you explore deals and find the right pedal at the right price.

Used
$132.48

New
$139.99

Used
$69.00

Used
$140.47

Discover pedals with similar features or sounds to the Micro Amp. This section leverages data to suggest alternatives that complement or expand your pedalboard. Ideal for exploring related sounds or finding a pedal that matches your specific needs.

Kingsley
Harlot

Recovery Effects
Cutting Room Floor

Stomp Under Foot
Cherry Bomb

Way Huge
Green Rhino MkIV

1981 Inventions
LVL YELLOW

Mad Professor
Sweet Honey Overdrive

BOSS
OD-200 Hybrid Drive

Ramble FX
Kismet

Heavy Electronics
Descend

Ibanez
OD850 Overdrive

Pettyjohn Electronics
Chime

CopperSound Pedals
Foxcatcher

BYOC
Silver Pony II

Menatone
Top Boost in a Can

Bogner
Ecstasy Red

Jetter
Gain Stage Gold
Check out the latest news and articles from around the pedal world.

Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton