Thanks KC. I didn't know your LS-8 had a V2 fuselage!

There is a removable panel behind the seat back. The top left corner
(to direction of flight) has a pattern of holes behind which is the
radio speaker. The right side has a door that opens up to the battery
compartment. I ended up drilling another set of holes in the top of
that door and mounting the speaker behind it with a pair of cable ties.
It's a perfect location for hearing and not in the way of anything
else.

-ted/2NO