They sell their panel mount intercoms to the experimental market and
anyone who wants to put one in a certified plane sorts out the FAA
issues on their own. Here's a thread from over on the Piperowner's
forum from someone who went thru a similar adventure.

http://forums.piperowner.org/read/2/58522/58522/quote=1


BTW, is anyone else going to answer the poor fellow's original
questions about the audio and music quality of a PS-Engineering
PM3000?

I'm kinda curious too because I just ordered one of these myself,
along with a new ELT and a bunch of other stuff from Spruce since my
Cherokee has just come up for annual and I'm tired of cables strung
all over the floor from a portable intercom and I want to tidy up the
interior with some upgrades. I selected the PM3000 over the Flightcom
403 because I'm already familiar with the FC 403 having installed a
couple of these myself in friends' RV's I helped build, and they're ok
I guess, but their sound quality doesn't exactly knock my socks off.
I've heard music thru a PS-Engineering full audio panel in a friend's
Glasair-III and it sounded great. I guess you get what you pay for.