Welcome,
I install a driver of WAVES MaxxAudio but I couldn't turn it on. It is always grey and there is information that "Actual default device is not " supported. This isn't truth because two years ago when I took this laptop from the box it worked with my earphones. I read a topic
https://community.acer.com/en/discussion/555668/acer-predator-helios-500-wave-maxxaudio-installation-after-format-and-fresh-windows-re-install/p1, but in my opinion it isn't solve my problem. I wouldn't like to make again (third time) a fresh install of the Windows only because some audio drivers doesn't work. In previous laptop, Lenovo y580, I only have to reinstall audio/realtek drivers and everything was fine. And in any device this should be work this way, reainstalling the drivers, but not cleaning up the whole system. So, the question is what have I to do here, to make possible this WAVES MaxxAudio drivers again?