Razer Blackshark V2 pro. Firmware update ruined the mic quality.

Hello. I tried to make google search about it, but didn't find any. I used Razer FW updater for the first time, it updated my gear to the Firmware v1.00.13_r3. I haven't changed any settings (checked every setting twice), but my friends started to laugh at my voice and asked if I bought a new headset. They weren't really good at describing it, but said that it's like talking from the can and definitely worse than before. Any other victims? And most importantly, is there a way to downgrade the firmware?