The analog audio connectors of the 52-4060 controllers are designed for internal use only:
the output level is not compatible, less than standard line output levels of +4dBu or +6dBu
the output has no short circuit protection, therefore a external use is not allowed
THD+N of digital to analog converter is equivalent to the THD+N of 52-4527B and 52-4424B PFL / Talk back amplifier circuits & speaker, for headphone or monitoring use the THD+N would be too large
the lower corner frequency response is limited to around 100 Hz, this is not useful for use with headphones or for monitoring
internal 48V is on the same connector, misuse may damage the external device or the 52-4060 controller
only 52-4527 and 52-4424 devices allowed to connect to the 52-4060 controller
→ use 52-7235A or 52-7224A or 52-1335A (or 52-7230A or 52-7222A or 52-7223A or 52-1330A/B) for connection of external analog equipment