Strange .. as, on my side I would avoid muddy/bloated low frequencies to improve these and try to get deeper, faster and clearer impacts in my throat...
2 or 3 years ago I have sent my personnel Z7M2 to Oratory1990 for measurements and generate autoEq parameters. So, these are what I apply to my sample.
More over, at my office, I installed connected to my W10 Workstation (FIIO M11 as USB DAC) the Sony Z7M2 with line out to an old powerful speaker amp Sony TAN 55ES (I use an Ifi iEMatch 4.4mm Balanced Male to Female Headphone to lower by -20db the output power of the TAN 55ES with the cable speaker to XLR4 adapter)
So, with such type of PEQ, the bass section is really near to a perfect Harman 2018 Target.
Maybe you can play a bit and increase the 200hz low shelf if you really need more rumble.
But as it is, and with some nearly instant A/B comparison with my DCA Stealth (plugged to a FIIO M17 in DC enhanced mode), though the stage width is significantly narrower and less deep, the Sound Quality of the Z7M2 after PEQ is nothing less than impressive !!!
.. Totally blank background, very impactful and fast low and ultra low frequencies .. and quite detailed high frequencies (at least till 15khz, as it's my ear limit).