R.L. wrote:

Aviation headsets have notoriously higher impedance than the typical earbuds
that come with Ipods and other consumer audio devices. Might be an impedance
mismatch requiring a matching transformer.


Ummm, yeah. And since the Muse is *designed* to input consumer audio
devices into aviation headsets, I would expect the built-in circuitry to
handle this just fine. IMHO, it does an "O.K" job, but not as good a
job as I would like.

Happy Flying!
Scott Skylane