Old Firmware Downloads

Looking for an older firmware version for your Empress Effects pedal? This page contains legacy firmware downloads for the Echosystem, Reverb, ZOIA, and ZOIA Euroburo.

These files are provided for users who need to revert to a previous firmware release for compatibility, troubleshooting, or specific workflows. If you’re simply looking to update your pedal, we recommend installing the latest firmware instead.

Important ZOIA Compatibility Notice

ZOIA firmware version 1.05 and earlier is not compatible with newer ZOIA hardware. If your ZOIA has a serial number of approximately 2000 or higher, do not install firmware version 1.05 or earlier, as it is not compatible with your unit.