I bought the RED Hifi and ordered the RED headphones to drop in. Love the helmet but the headphones are garbage.
Then my buddy got a RED Frends edition that had the audio built in, I tried it on and it was 10x better than mine. So if you get one of the RED Frends version they are legit. You could also try to find just the Frends audio part separately but I had no luck in doing that.