Oh very interesting! You're talking about the HEQ profile that targets a harman-like response? Do you know where I could find Marv's work product (presumably somewhere on SBAF?)
Here
Most people there think Harman's bass boost is BS (and I agree with them on that) so their compensation curve is focused on the mids and treble.
Go to SBAF for the headphone measurement and discussion.
Keep your mouth shut or get the the hell out when someone starts rambling on about how many rows forward or back a particular DAC moves your seating position.