Line Out Phase noise (zero-beating) with SUB RCVR

[AA4BQ]

...loving my K3.



I have some very nice audio sound processors that I have enjoyed
using to enhance audio output from (now, the K3). I notice that
when using the SUB RECEIVER, the nice audio separation (right/left)
for the headphones does exist on the line out BUT the audio coming
from the line out has phasing effects (like zero-beating) that the
headphone audio does not. I tried to ignor it but the zero-beating
effect becomes annoying (especially using a headset connected
to my sound device).  I considered using the output from the
K3's phonejack to drive the audio gear instead of LINE OUT but
the front panel phonejack's non-isolated output causes the
expected ground loop hum (not to mention the impedance issues).

Is the solution firmware fixable or is this issue hardwired.
I REALLY enjoy the compressors and added specialized
audio processing I get via the E-MU interface on my PC but
this phase noise is an issue. (Yup, the crystal filter offsets are
all set correctly/identically in both receivers.)

Thanks. What a great product.