Used MXR MICRO AMP Vintage 1978 Guitar Effect

Used MXR Micro Amp

Estimated Year: 1978 

Made in: USA (Rochester, NY)

The MXR Micro Amp is one of the most iconic clean boost pedals ever made, and this example is a true original from MXR’s classic Innovations-era in the late 1970s. Known for its simple one-knob design and massive headroom, the Micro Amp is perfect for pushing tube amps into natural breakup, lifting solos in a live mix, or adding clarity and punch to long signal chains.

This vintage unit features the original script-style MXR logo, USA-made enclosure, and hand-assembled internal circuit using period-correct components. These early versions are highly sought after for their warmer response and more musical character compared to later reissues.

Features

- Vintage MXR Innovations-era clean boost

- Single Gain control for up to +26dB of output

- Ideal for solo boosts, tone shaping, and signal buffering

- Original USA-made enclosure and hand-built circuitry

- Classic late-1970s script logo version

Condition 

This pedal is in good vintage condition for its age.

- Cosmetic wear and scuffs consistent with decades of use 

- Original internal components and wiring 

- Fully tested and functions properly 

- Velcro on bottom from previous use 

Store Policies 

- All items are tested before listing and again before shipping. 

- Orders typically ship next business day. 

- Shipping is available to the continental U.S. only. 

- We do not accept trades on shipped items. 

- Returns are accepted within 48 hours of delivery. The buyer covers return shipping, and a 20% restocking fee applies. If you have any questions before buying, feel free to message us—we’re happy to help.