Epson AP-60 Sound Enhancement System Product Support Bulletin page 8

How to confirm firmware version number.
1. Click the "Get Version" button.
Three sets of numbers will display -Confirm that "13" is displayed in the center
of the figures as show in the blue circle. "13" indicates the updated firmware
version.
7. The download process has been completed.
8. To close the downloader window, click the X in the upper-right corner of
the screen
Then press the PWR button on the front side of the audio control board to
set the AP-60 to Standby mode
Disconnect the Power Cable
Disconnect the RS-232 cable
Reinstall the audio control board and secure the panel with two screws
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PSB.2010.01.001