Lexicon MRC – Version 4.0 Firmware upgrade [Latest OS] [LXP-15]


Lexicon MRC – Version 4.0 Firmware upgrade [Latest OS] [LXP-15]

SKU: FW-125 Category: Tags: , ,


This is firmware update 4.00 and the latest official released operation system by Lexicon. This operation system update/upgrade requires three eprom.

Lexicon MRC Version 4.00 introduction:

Version 4.0 was released, support for the Lexicon PCM70 was limited considerably, as the 4.0 software was geared heavily towards use with the LXP-15.


  • Added – Control of Lexicon LXP-15
  • Added – Two-way communication allow user to upload registers directly from their LXP-1, LXP-5 and LXP-15.

Which software version is my Lexicon MRC running?

To check your current software version, simply turn on your MRC and the software version will appear briefly during the startup process.


  • The eproms will be verified and packed in anti-static material to ensure a safe shipping.
  • Version 4.0 cannot be used for Lexicon PCM-70
  • Upgrading from 1.0 or 2.0 may require a light modification for the new decoding. (No worries, I’m also able to provide the necessary modification instructions)