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Sony MDR-7520 - Page 68

post #1006 of 2340
Quote:
Originally Posted by bixby View Post

70mm top to bottom and 40 mm across the center. It fits my 68 mm top to bottom ears, yea!

 

Thanks! That would fit my ears (a dainty 67 mm in height) too!

post #1007 of 2340
I'd be very surprised if someone's ears didn't fit in the 7520s. So damn roomy.
post #1008 of 2340

I'm very interested at this comparison between M4U1 and Focal Spirit Pro. Could please elaborate anymore ?

post #1009 of 2340
Quote:
Originally Posted by ballard3 View Post
 

I'm very interested at this comparison between M4U1 and Focal Spirit Pro. Could please elaborate anymore ?

wrong thread, try the spirit pro threat. but I hope the pro is wayyy better the m4u1 is strident, unrefined, bulky yet engaging.

post #1010 of 2340
Quote:
Originally Posted by bixby View Post
 

this is interesting, from the audio check site:  http://www.audiocheck.net/audiotests_frequencychecklow.php

 

Thanks for the link bixby. I do know of that site; I even use it occasionally to check things - including my hearing!

 

I did the sweeping sine tone test, and then proceeded to the Harmonic Distortion test. I even downloaded the WAV files of the 16Hz and 14Hz test tones. I can definitely hear the 16Hz tone on the 7520. That's with the output volume on my iMac set to half way. I can hear something at 14Hz, but I'm going to play safe and say that although I'm pretty sure I can hear that, I can absolutely without any doubt hear 16Hz on the 7520's.

 

It maybe that my memory of the original test I heard was incorrect and that I could hear something at 14Hz, not 13Hz. If I find it again I'll post a link. It was a HD test on YouTube somewhere.

post #1011 of 2340

cool.  I'll have to give it a go later today myself.  With tones that low it should sound or feel like air tickling your drum.

post #1012 of 2340
Quote:
Originally Posted by Mike F View Post

The 7520's do go loowww! I tried mine with an online bass test and I could hear I think it was 13kHz with them. I was tempted to turn them up to see if I could hear lower, but that could damage your hearing so I thought better of it. Safe to say that they will go as low as anyone can hear. It was a truely impressive experience, not only that they went that low but that they could handle it without distortion (let alone rattling!).

Did some listening to the low bass test tones yesterday.  I did hear down to 14 on the Sony and NAD.  Funny though both had harmonic distortion after a few seconds at 20 hz.  I am going to repeat the test on another computer setup and different dac just to validate as it may be the hardware.  Then again it may be a point of resonance for both cans.

post #1013 of 2340

Personally I would not do the test. Too much of a chance to ruin the headphones with signals you can barely hear. You would feel more of a pressure sensation which the ear is sensitive to.

post #1014 of 2340
Quote:
Originally Posted by john57 View Post
 

Personally I would not do the test. Too much of a chance to ruin the headphones with signals you can barely hear. You would feel more of a pressure sensation which the ear is sensitive to.

 

There are many headphones that I wouldn't try it with, both because they're likely to get damaged and because they're not likely to be able to go that low anyway, but the 7520 isn't one of them.  The tests are very well constructed, and if you follow the instructions you're unlikely to do any damage.

 

http://www.audiocheck.net/audiotests_frequencychecklow.php

 

Here's the relevant part from that page explaining why it is in fact possible to hear those frequencies on headphones (if they will go that low):-

 

Humans hear frequencies from 20 Hz up to 20,000 Hz. The lowest bound, 20 Hz, with a wavelength of nearly 20 meters, is a frequency we feel rather than actually hear. This test helps you benchmark the lowest limit of your audio system's frequency extension.

Because of their increased wavelength (nearly 20 meters at 20 Hz), high output at low frequencies usually requires large drivers (subwoofers). Headphones or earbuds, despite their small size, have less trouble playing back those low frequencies: by sealing your ear canal, they create a volume that acts as a pressure chamber [*]. This phenomenon is totally different from what you hear when listening to a speaker playing in the open air. Without the "cabin effect" (another name for the same phenomenon), earbuds would produce hardly any bass.

 

[*] This sealed space offers an interesting property: lifting the low frequencies by 12 dB/oct below a frequency related to the dimensions of the enclosed volume. With an ear canal that is approximately 2 cm long, this magical frequency is located at about 5 kHz. With more than five octaves separating the bass range from this frequency, imagine the bass boost!
 
And here's what it says on the Low Frequency Harmonic Distortion Sound Test page:- http://www.audiocheck.net/testtones_subwooferharmonicdistortion.php
 

The bottom row (10-20 Hz) consists of frequencies that are below the human hearing range (infrasound). Ideally, these frequencies should remain inaudible. Outstanding subwoofers coupled with excellent hearing will reach 18 Hz maybe 16Hz, but never 10 Hz. 10 Hz is located one octave below our lowest limit: there is no way humans can hear such a frequency.


Edited by Mike F - 2/18/14 at 11:29pm
post #1015 of 2340

I also felt down to 16 hz on my AKG K540. 14 hz was just BARELY audible.

post #1016 of 2340

Odd request, but anyone have a picture of the 7520 on their heads? I'm curious as to how they look "in the wild", so to speak.

post #1017 of 2340
Quote:
Originally Posted by Ikarios View Post

Odd request, but anyone have a picture of the 7520 on their heads? I'm curious as to how they look "in the wild", so to speak.

Its not that odd. Give me a little bit and I'll take a pic. I'm a good reference since I shave my average sized head 7 1\4 hat size which is right in the middle kinda. I've got the M100s w the XL pads as well so I can take one with those too for reference.
Edited by dbdynsty25 - 2/19/14 at 7:23pm
post #1018 of 2340


M100 from the front (excuse the ugly mug haha)



7520 from the front.



7520 from the side.
Edited by dbdynsty25 - 2/19/14 at 8:08pm
post #1019 of 2340

Thanks! They're more compact width-wise than I thought they'd be. I have a really big head so this is kind of a big concern for me. Good to see they're similar to the M100s in wear-shape.

post #1020 of 2340

That orange Vmoda cable :)

I have a non mic black/grey Vmoda cable awesome for what it is,

but I would like to know how is the mic quality on this one?

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