Oh! I bought Senn HD212Pro 2 months ago!
I don't like it too bassy, sounds weird huh! Because I love NewAge, which don't need bass very much! I love Piano, Violin sounds, so HD212 is too BASS for me, sounds like I should buy HD201.
Anyway, pair with my newly bought Little-Tube LDM+, the High & Mid freq improve, which also tighten the bass, sounds quite good.
Luckily didn't get PA2V2, heard that it make your BASS very strong, which might make my HD212Pro worse.