I mounted mine under the headrest. The speaker is about 2.5in tall and 4 wide,
a little smaller than the inclinometer. It sets between the posts held in place by
the rest. I ran a coat hanger down the back of the seat and ran the wire through,
and put a plug there so I can remove the speaker and tuck the wire when I am not
using it. This puts the sound close to you so you don't have to blast the sound.
I have put an ear plug in too...just be careful of that...I will post a pic tomorrow.