[USER=16794]ghostface944[/USER]
I been in this crazy world of cosplay for a couple years now. And like you, I still have yet to find a solution for the heat inside my helmet.
I'll set this up like [USER=6751]TKOK[/USER] has done with my suggestions....
Fans: I live in Washington State and the 501st Garrison Titan has a member who sells helmet fans I just this week ordered his two fan kit. One fan for my helmet and the other for my daughters Boushh Helmet. His sales link is: HELMET FAN KITS FOR COSTUMES / COSPLAY
Speaker: I had an Aker 1505 but didn't like it that much. I have on order a MiCom 2.0 setup that should be in my possession next month - September. If you're not familiar with the MiCom 2.0 setup here is a 9 minute video demo on the product: [MEDIA=youtube]J7DLWyLlkvE[/MEDIA]
Range Finder: Just like [USER=6751]TKOK[/USER] stated, Neo Fett (aka: [USER=8925]BH-51512[/USER] ) has an outstanding kit. I absolutely love mine (See Below) I bought the version where the button is hidden in my glove on the palm of my hand and my finger activates it! But there are other options too. BH-51512 actually has a sales thread right here on The Dented Helmet - in the Cargo Hold:
[URL unfurl="true"]https://www.thedentedhelmet.com/forums/threads/wireless-rangefinder-servos-new-v7-nov-2021.31742/[/URL]
[ATTACH=full]226736[/ATTACH]
Best of luck in whatever you decide to do!


-Iron