1More Triple Driver Over Ear Headphones Measurements

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Raw frequency response plots show the headphone having some difficulties sealing on the head causing the bass response to vary some when moved from position to position. These do measure more like on-ear cans in that regard. I suspect the seal will be better on real ears and I did hear bass extension as modestly better than measured.

Though a little wavy and uneven, the compensated response plot shows a mild warm tilt overall. There is a little discontinuity between 200Hz and 500Hz, but the run-up to the peak at 4kHz remains close to neutral. I didn't hear these cans as colored through the midrange, but they didn't have the liquid coherence of some high-end cans.

Though the peak at 4kHz is a tad high in frequency, the level is good. The fall off above 4kHz is right on target and astoundingly noise-free.

30Hz square wave has a rounded shoulder initially belying a mildly warm headphone, Subsequent waveform top remains above zero 'til the very end and is not sway backed. This is a bit of a surprise given the unusual bass response heard. A glance at THD in the bass shows a significant shelf up. All I can say is the bass reflector is doing something, but I really can't tell what by the measurements.

300Hz square waves show a leading edge peak of about the right height, with some mild ringing due to the 4kHz peak. I've found that as long as the ring diminishes within a few cycles and the peaks have a nice, clean sinusoidal shape these features tend to be benign.

Impulse response also shows the ringing, but very little else. This is a very clean impulse response.

THD+noise is quite good other than the unusual rising bass shelf. I'm not certain this is due to what we would normally expect. It may be the unusual bass reflector response doing what it's supposed to do but showing up as THD or noise.

As mentioned in the body of the article, impedance and phase plots are fairly flat for a dynamic headphone. Phase response is particularly flat above 4kHz. Most cans would be rising quite a bit more strongly.

Isolation is good and fairly typical for a headphone of this type. Needing only 51mVrms to produce 90dBspl at the ear these cans will be easily driven to solid listening levels from portable devices.