Back home with my XB90EX. I'm using the 5TX directly out of my laptop with foobar.
I kept my foobar EQ on. Without the software EQ i was already using, it gave nice bass on my XB90EX with bass on low or medium band and maximum gain, but I still wanted more bass. I know these headphones are capable of pushing more bass.
That said, the software + amp bass boost is glorious.
Basshead approved, but knowing an extended bass version exists and I don't have it... well more bass is the only thing I could ask for here. So I think I am going to order myself an extended bass 5TX and just hold onto this until the extended bass one gets here
The MDR-7550 though... that is a MONSTER with the software and hardware EQ combo! like seriously, you either hear the bass or the rest of the song! i love it!