Yep, the link that BMR14 shared was very informative. Like you I was really excited when I read about the chokes because I have a box of them sitting around the house from all sorts of other electronic / audio / video projects.
At any rate, I'm kind of in the same situation as you (I'm in Northwest Arkansas) and it does get really hot and humid in my neck of the woods as well.
I really only want to have to do this once and button it up for a while, but I do listen to FM quite a bit while riding and would be sorely disappointed if I lost all my FM reception
Between HU flashes, magic boxes, picking the right amp and speakers (fairing only) I've been getting a headache and have almost decided I don't ride enough to make it all worth the hassle
In the interim I've installed the JBL GT0638 6.5 tri-ax speakers so I guess that I'll just sit and stew on this for a while. This is my first touring Harley and it seems like every time I touch the bike something goes wrong. I traded my 2011 FXDC in on this new RG. The FXDC was built like a tank, but it seems like HD has taken a lot of "cost" cutting corners on the new bike.
Putting the SS in the bag is an other option too. You also get to tune the system better with the amp in the bag. I thought about moving mine, but haven't gotten around to it yet.
2010 FLTRX , Stage 1, 13" Madstad, Mono tubes, SuperShox, Heritage style bars. Alpine CDE-HD149BT,Soundstream Picasso Nano Series PN4.520 , 5X7 and 6.5 Infinity Kappa speakers
If I have to explain ,you wouldn't under stand anyway.