RX audio is a bit of "Pet Peave" with me.. "I don't need no Stinkin'
Speaker". Most RX's (even gud ones) have "CRAP" audio stages.
Try a free download of some audio spectral analysis software and
you will see that even an R-390 (NO "A") won't pass much above
5kc through the audio amp even when set to 16kc BW! You pretty
much NEED to hook up to the "Diode Load" and feed that to a nice
"Station Audio" system. I use an old Pioneer SX950 and a pair of
JBL studio monitor speakers. "Rock the House".
Room acustics is what I need to pay attention to now. I found a
gud "Instructional" video on that topic here:
http://exposed.ethanwiner.com/852x480.htmGood info and it works both ways, RX and TX. I'm mainly concerned with
RX since I seldom TX. Anyway I won't "Critique" any ones audio
with my FT857,
73
/Dan
Another problem you will run into with some of the older receivers is that you will get a very loud pop! thru the speaker when muting them during transmit. I had this problem with both my HRO-50 and HRO-60 receivers.