You have limited software volume and voice mixing control ( Hold the PS button for 3 secs and you will see some settings ), but the voice and game audio wont sound quite a great as it does through the mixamp, and you will have to open that software menu everytime you want to mix game audio and voice volume, and the mixing options are somewhat limited there. With PS4, you can now just plug it right into the controller and be good to go. OR you need the breakout cable that breaks it out in to 1 3.5mm for mic and 1 3.5mm for stereo headphone ). You can probably just plug it into your PC and be good to go ( although you need to either have a PC that takes a 3-ring stereo + mic 3.5mm plug.

The mix amp is key, but without it, you are left with essentially a pretty good wired headset. I am sorry that some people have had build quality issues, but mine seem built like a tank and have been through HEAVY use for 5+ years and are still amazing ( maybe they make them more cheaply nowadays? I dunno ). One of my favorite parts about them is that they can work in some capacity just about anywhere ( PC / PS4 / XBONE / 3DS / Vita / Phone ). they don't make them anymore ), for going on 5+ years and they have always worked like a champ. Have had the same A40s plus the wireless mixamp ( kinda the precursor to the A50s.

Astro a40 headset cord