[TenTec] audio from the I/O connection at the back of the Orion

[jack]

Question: is there a way to turn down the audio gain from the I/O DIN 
connection on the back the Orion?

I have 2 Orions and have them connected to a Yankee Clipper SO2R+ which 
feeds the audio thru to headphones. turning down the main and sub AF gain 
does NOTHING to the I/O gain thru the DIN connector.

there is much too much volume in the headphones. the output is so loud thru 
the SO2R box that I can use the headphones as a speakers. in fact right now 
I am listening without problem to a CW chat on 17 meters with the headphones 
on the desk.

thanks,
jack
ak7o