Thanx all...
Thanx for the thoughts.
1. Yes, I'm thinking on the ground ATIS, Clearance delivery, etc.
2. Radios are on essential bus, so you do not need to have master on for radios.
3. Asking questions does not make you dense. I ask all the time and I'm only slightly dense. All advice I get from VAF is pretty good. Please feel free to question anything I say. It is why I ask.
4. I Learned to fly in a C-150 with no headsets. I do have headsets now, and was not planning on having a running engine without them.
5. I did not know the Dynon audio would not power a speaker, so an audio amp would be required? Now we are getting messy (another volume control?)
6. I think the best advice here is don't bother, but I did sit in an RV-6 with a speaker last Saturday at KWHP, and thought it was pretty cool.