And they work a treat? good to know!
I've just been looking at the K2 Rival Pro (level 3 audio) and K2 Rant Pro (level 1 audio?) helmets with built in Audio.
I tried the Rival Pro on and the sound is actually very good, goes decently loud and the cost is very similar to what it would cost to do a conversion job, anyone can vouch for it?
Either that or i'll get the K2 Rival without the Audio and build in my own with some KossKSC 75's maybe