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The A2’s Time Domain Reflectometer (TDR) for Ethernet cables is sensitive to aging capacitors.
If you replace any capacitors, relays, or the backlight, your A2 will lose its factory calibration for absolute level measurements (dBu, dBFS). However:
To restore absolute calibration, you need:
Neutrik does not host legacy service manuals for the A2 on their public website any longer.
