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Headroom Freq. response graphs for HD650 and K701?

post #1 of 13
5/1/07 at 6:53pm
Thread Starter 
I was looking at the frequency response graphs for the Sennheiser HD650 and the AKG K701 headphones today.
The measurements do not seem to match the way they sound in comparison to one another, especially in the bass!
The bass sounds weaker and less extended on the K701's, IMHO.
According to the frequency response graphs the AKG K701 has BETTER and LOWER bass extension than the Senn. HD650!
The AKG also has more output from 20hz to 80hz than the 650, according to the measurements.
I also noticed that the 650 has more output at 3.5 khz, 14khz, and 16khz.
The AKG has much more output from about 5khz to 10khz, and a big dip at 12khz compared to the 650.
Any one care to comment on these measurements and the way the headphones sound in comparison to the measurements?
Thanks!
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post #2 of 13
5/1/07 at 7:04pm
The bass sounds weak on the 650's??? man thats a first. whats your source and amp?
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post #3 of 13
5/1/07 at 7:04pm
As for the highs, you pretty much have to draw an invisible line with them. They are really not as jumpy to the ears as they are on paper.

Any how, the mids seem pretty similar, but elsewhere pretty different. The AKG has more bass and highs, but lacks in detail. The HD650 has relaxed highs and a bit less bass, but has more detail.

Just for fun I started comparing my eH350 to some stuff, and as expected, they match the mids and highs of a lot of the HD5xx and the HD600 models, but those probably have more noticeable soundstage.

And nothing should be solely based on graphs.
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post #4 of 13
5/1/07 at 7:12pm
Thread Starter 
OOPS!!
I meant to say " The bass sounds weaker and less extended on the K701".
Brain fart! Sorry about that!!
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post #5 of 13
5/1/07 at 7:15pm
Thread Starter 
It is edited now to clear up any confusion.
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post #6 of 13
5/1/07 at 7:39pm
It all comes down to what you hear, really. A graph is just a way to visually show measurements, it can't predict whether you'll like one pair of headphones over another. The only way to find out if you like something or not is to audition it, there's no reason to shop for audio equipment based on frequency response data, period.
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post #7 of 13
5/1/07 at 7:46pm
Quote:
Originally Posted by qazwsx View Post
As for the highs, you pretty much have to draw an invisible line with them. They are really not as jumpy to the ears as they are on paper.

Any how, the mids seem pretty similar, but elsewhere pretty different. The AKG has more bass and highs, but lacks in detail. The HD650 has relaxed highs and a bit less bass, but has more detail.

Just for fun I started comparing my eH350 to some stuff, and as expected, they match the mids and highs of a lot of the HD5xx and the HD600 models, but those probably have more noticeable soundstage.

And nothing should be solely based on graphs.
Where do you get that the K701 lacks detail where as the HD650 has more??
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post #8 of 13
5/1/07 at 7:55pm
Quote:
Any how, the mids seem pretty similar, but elsewhere pretty different. The AKG has more bass and highs, but lacks in detail. The HD650 has relaxed highs and a bit less bass, but has more detail.
Couldnt be farther from the truth IMHO.
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post #9 of 13
5/1/07 at 7:56pm
Quote:
Originally Posted by Cousin Patty View Post
Where do you get that the K701 lacks detail where as the HD650 has more??
At around 17k, the K701's have a big dip.
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post #10 of 13
5/1/07 at 8:13pm
IMO, graphs are a good indicator and referance in one dimension, that being on paper of what is possible to be heard. At ear experience brings into play a host of variables. beginning with our downstream gear, on up to the earpad density shape , seal and depth from the ear , as well as the ear shape itself. Of course, our hearing range / sensitivities and the processeor of sound, our brain is the final arbritator of the experience... No wonder why we arguee whats best and sometimes read contridictory impressions other than our personal experience. Often left filed under the heading of "personal preferance" for diplomatic purposes . Where that isn't so much the truth as to their being a myraid host of reasons for what we hear, only one of which is reflected in graphs, for instance.
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post #11 of 13
5/2/07 at 6:42am
Quote:
Originally Posted by daltonlanny View Post
I was looking at the frequency response graphs for the Sennheiser HD650 and the AKG K701 headphones today.
The measurements do not seem to match the way they sound in comparison to one another, especially in the bass!
The bass sounds weaker and less extended on the K701's, IMHO.
According to the frequency response graphs the AKG K701 has BETTER and LOWER bass extension than the Senn. HD650!
The AKG also has more output from 20hz to 80hz than the 650, according to the measurements.
I also noticed that the 650 has more output at 3.5 khz, 14khz, and 16khz.
The AKG has much more output from about 5khz to 10khz, and a big dip at 12khz compared to the 650.
Any one care to comment on these measurements and the way the headphones sound in comparison to the measurements?
Thanks!
I hve also looked at those graphs, and I as you can't understand how 701 can have more bass I don't think I ever heard anyone that think that 701 is more bassheavy than 650, exept for "qazwsx" on this thread
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post #12 of 13
5/2/07 at 6:53am
Quote:
Originally Posted by qazwsx View Post
At around 17k, the K701's have a big dip.
under 17k, 701 has much more detail and much bigger soundstage
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post #13 of 13
5/2/07 at 9:20pm
Keep in mind that those measurements are made with reference to an "average" head and ears. See here.

Also note that each driver is different. You can test this yourself by playing a slow mono sweep (say, 30 seconds) going from 20hz to 20khz. You'll notice that even though the sound going to each driver is exactly the same, the "center" of the sound will sway left and right as the frequency changes, sometimes quite significantly.

Headroom used to have FR graphs with the L and R side graphed side by side, so you could at least get an idea of how much each driver can vary, but they seem to have disappeared.
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