There are three distinct stereo audio channels in the K3, and they all
have slightly different characteristics.
LINE OUT
This has its own digital-to-analog converter (DAC) and is transformer
isolated.
PHONES
This shares a DAC with the speaker channel, but has its own amplifier
and isolating resistors to help reduce the impact of plugging in two
sets of headphones.
SPEAKER
This shares a DAC with the headphones, but has its own stereo amplifier.
We are aware of the discussions regarding harmonic distortion in these
audio paths. While it is easy to just say, "The radio meets specs!" (and
it does :-) we are looking at ways to improve the performance of the
entire audio system.
73,
Lyle KK7P
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