Well... My Pixel 2 XL drives both headphones, even the DT770s @ 250Ohm...and even at pretty impressive volume! Of course the DAC in the pixel is pretty crappy compared to my SB. But I'm at home now, so i can't test until Monday. Preliminary tests on the pixel have the Sony's putting out considerably more bass though, which is the complete opposite of everything I've read about these two headphones. The Sony's are definitely muddy in the low end on the pixel, but are pretty damn clear above that! Both headphones leak a little unfortunately, per my fiance. But i think she was being a little too critical, at least of the beyers.Tell us how what you thought of both of 'em, after you're done testing! I've never tried out the MDR-7506 before ...