Boosting Base for Razer BlackShark V2 X ?

I have decided to upgrade my headset from Kraken 7.1 V2 to Blackshark V2 X. (The 3.5mm connection)
(The reason why not V2 because the mic works better with 3.5mm connection rather than USB according to Hardware Canucks Review.)

Now... Blackshark V2 X is quite lack of the base. The element which I admire the most.
I am thinking to upgrade for THX Spatial Audio but the promo code not available to use for Thailand region, so I still deciding.

Also I can use my realtek firmware from ASUS mainboard but i have to disable 7.1 surround mode.

Does any one have any ideas on how to boost base (lower frequency) or use equilizer to work along with 7.1 surround sound.

Thanks