[Elecraft] K3: "Mixing" sub-RX audio in stereo headphones

[Brian Machesney]

I have the 8-pole 1.8-kHz filter for phone contesting, but it's on the
border of intelligibility for my ears. I want to overcome this by mixing in
a small amount of wider-bandwidth audio from the linked sub-RX with a wider
filter. While I can set SPKRS to 1 to accomplish this, it seems that with
stereo *headphones* I am forced to have the main and sub in left and right
ears rather than mixed together into both ears.

Any hints on how I can do this? Have I missed something in the manual? Do I
have to plug my stereo headphones into the speaker jack?

-- 
73 -- Brian -- K1LI