So I have the Astro's A4's and I brought the new adapter more than happy to get home and plug everything in. I took out my two mix amps, start following all the directions and how to connect everything together, my Astro's sounded like crap and it just wasn't making sense
THIS IS WHERE I WANT EVERYONE TO STOP
ALL YOU HAVE TO DO, is plug your Astros directly into the New stereo adapter....THAT'S IT.....The new adapter is basically xbox version of a mix amp. It does the exact some thing the Astros mixamp does, lets you mute, volume up/down, game volume vs chat volume. NO need to connect ANY of the two A40's mixamp, no need for optical cable, no need for nothing. Just connect the Astro headset into the adapter and your good to go. My sound is crystal clear. I couldn't believe it, Another friend has Astros and he tried the same thing with the same result. We're both happy.