jsmiller58
Headphoneus Supremus
With the elevated bass and the treble spikes on the graph it's no wonder that the Phantom can sound both dark and have a treble edge at the same time...It's been a while since I heard the Sundara, but it was reminiscent of the Hifiman HE560, but a little bit smoother treble response, but not as well extended in both bass and treble. The HE560 was a bit more edgier, which people find bright (it's that drop in the 1-2K followed by a spike up in the upper midrange that can get you).
The orange line (Phantom) is much darker and drops off a cliff without all the mods.
By the way, I did just move the large square foams from the pad side to the grill side (no foam on pad side, no nylon cover on grill). Does sound better. Still a very dark headphone. But I think I will keep it in this config (with my ZMF suede pads) and call it as good as I will make it...