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Author Topic: Full Spectrum Distortion Measurements for W3000, HP1000, and SR007  (Read 1868 times)

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Marvey

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Full Spectrum Distortion Measurements for W3000, HP1000, and SR007
« on: May 16, 2012, 10:21:44 PM »
Full Spectrum Distortion Measurements for W3000, HP1000, and SR007
80Hz

[I used a different FFT size for the HP1000 measurement, so the spike will look more narrow on the HP1000 compared to the other headphones]

All tones are at 90db SPL - so disregard the graph markings - or calibrate accordingly.
« Last Edit: May 16, 2012, 10:40:06 PM by purrin »
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Marvey

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Re: Full Spectrum Distortion Measurements for W3000, HP1000, and SR007
« Reply #1 on: May 16, 2012, 10:23:04 PM »
1000Hz
« Last Edit: May 16, 2012, 10:28:08 PM by purrin »
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Marvey

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Re: Full Spectrum Distortion Measurements for W3000, HP1000, and SR007
« Reply #2 on: May 16, 2012, 10:23:13 PM »
2000Hz
« Last Edit: May 16, 2012, 10:30:11 PM by purrin »
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Marvey

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Re: Full Spectrum Distortion Measurements for W3000, HP1000, and SR007
« Reply #3 on: May 16, 2012, 10:23:22 PM »
4000Hz.

Whoa. The STAX hit a sore spot. The 007 has a minor resonance at 8kHz (2nd fundamental of 4kHz).
See CSD:  http://www.changstar.com/index.php?action=dlattach;topic=297.0;attach=1004;image
« Last Edit: May 16, 2012, 10:38:57 PM by purrin »
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maverickronin

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Re: Full Spectrum Distortion Measurements for W3000, HP1000, and SR007
« Reply #4 on: May 17, 2012, 12:15:04 AM »
Interesting peak on the 007.  I guess it's good that it's so narrow so it doesn't get excited as much.
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Maxvla

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Re: Full Spectrum Distortion Measurements for W3000, HP1000, and SR007
« Reply #5 on: May 17, 2012, 12:42:13 AM »
Looks like a sweep by the HP1000.
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Marvey

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Re: Full Spectrum Distortion Measurements for W3000, HP1000, and SR007
« Reply #6 on: May 17, 2012, 12:52:59 AM »
Except in the bass. The HP1000 has a good amount of 2nd order at 80Hz. I should take another at 150Hz.
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Anaxilus.

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Re: Full Spectrum Distortion Measurements for W3000, HP1000, and SR007
« Reply #7 on: May 17, 2012, 02:31:47 AM »
I wonder how my HP2's will compare.  Maybe do a pre and post-mod measure.  Bring over the HD800 as well.
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anetode

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Re: Full Spectrum Distortion Measurements for W3000, HP1000, and SR007
« Reply #8 on: May 17, 2012, 11:48:49 PM »
I'm pretty impressed by the Grados, even at 80hz. Highest harmonic is 40db down and the THD is dominated by the 2nd. Not bad at all.

Likewise, I expected the 007 to make a stronger showing. Guessing that the resonance responsible is an inescapable consequence of the large-diameter metal cups
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