changed the tips to the ones from the fx40 as Ds suggested.
They sound like my Brainwavz HM5 (from memory. haven't used them in a week)
But. with that meaty low end I've been looking for.
And then as i was removing them from my ears, the tips got stuck in my ears.
fx40 tips on xb90ex = no bueno.
they don't fit tightly.
on that note.
what's the cheapest wider bore tips I can find that fit the xb90s snuggly (like the sony tips that come with)?