Beyer DT1350 Frequency Response and CSD Waterfall Plots.
Driver matching is nothing short of horrible. Yay for Beyer. T1 repeats itself.
Voice comes from left of center. The matching gets better as the frequency increases - so the imaging is kind of wierd.
CSDs are at -30db and -40db floors. Very clean with the exception of a spike near 15k. The spike there wasn't that noticeable to me, probably because it's down in comparison to the rest of the spectrum below it - rather unlike the Ultrasone ED8.
Audibly the three major dips at 150Hz, 3kHz, and 8kHz are hurtful and contribute to its funny tone. Subjectively the tonality of the headphone doesn't have anything horrible sounding (in terms of nasty spikes that destroy our hearing), but it just kinda sounds "not good." Mid-bass dip is never good.