Hello,
I have a Blackshark V2 Pro device. Everything was fine at first. I don't know what caused the issue, but even though the firmware version and all applications are up to date, the equalizer settings do not take effect. I followed the instructions for a clean installation, deleted and reinstalled the drivers multiple times, but nothing worked. However, I noticed that when I installed the THX Spatial Audio software and started the 15-day trial version, and then selected THX as the default device in the settings, the equalizer settings in this software take effect. However, I don't want to use THX as the device and the 15-day software trial because the sound quality there is not very good.