Have you looked at any modern audio panels?

Both PS Engineering and Garmin provide 4 +/- unswitched auxiliary inputs...



"Larry Dighera" wrote in message
...
[Possible audible alarm masking by ANR headsets warning snipped]

My old PA28-235 had a visual stall warning system, so there was no
issue there.

Given the fact that it is imperative to wear hearing protecting
headsets while operating most GA aircraft if you don't want to
permanently damage your hearing, perhaps it's time avionics
manufacturers provided warning indicator inputs to their audio panels.
Of course, such a system of providing audible alarms in the PIC's
headset would necessitate other equipment manufacturers providing the
necessary additional outputs.