Used MXR Iso-Brick

🇺🇸MXR2016–presentAlso known as: Iso-Brick, M238, Power Supply
For sale now:1685 listings
Price range:$20–$440
Most common:good

About the MXR Iso-Brick

The MXR Iso-Brick was introduced by MXR in 2016 and remains in production today. MXR has been building instruments in the United States since 1972. You may also see this listed as "Iso-Brick", "M238", "Power Supply" — they refer to the same instrument.

Buying Guide

  • 1Test the footswitch — it should click firmly and engage/bypass cleanly without pops or signal drops.
  • 2Check that all knobs turn smoothly through their full range. Scratchy pots are cheap to fix but indicate age or neglect.
  • 3If the pedal uses a battery, check the battery compartment for corrosion. If it uses a power supply, test with a standard 9V center-negative supply.

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