Mysterious HTC phone appears, flaunts diagonal BoomSound grill

Uh, oh, what's that on top of this leaked HTC device, it seems like a BoomSound speaker grill of the type we haven't seen before. It's not the typical rectangular grill that is on the One line, nor the rounded openings on the recent Desire portfolio. 

These are not even the new thinned edge speakers that can be spotted on the One M9 leaks so far, but rather diagonal openings that show the speaker mesh below. 

Are these the rumored Bose sound speakers, after all? Well, HTC is rumored to release no less than eight machines this year, so this might be one of the upcoming novelties, like the 5.5" one codenamed A55 we heard about not long ago.

source: @upleaks (Twitter)