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Headphone CSD waterfall plots - Page 62

post #916 of 937

What Philips model is it? Looks a bit high mid centric (and problematic). How does it sound?

post #917 of 937
Quote:
Originally Posted by ultrabike View Post

What Philips model is it? Looks a bit high mid centric (and problematic). How does it sound?

 

The SBC 3178. Sounded bright and boxy.


Edited by vid - 4/8/13 at 5:24pm
post #918 of 937

 

Beat that for stock channel matching.

 

I wonder, how is it that these mid-range headphones from the '70s and '80s still today have better-matched drivers than do our present-day overpriced mid- and high-range phones?

post #919 of 937

How? Made in China + 1000% profit. wink.gif

post #920 of 937

AKG K 701

 

 

How I hear them, too.

post #921 of 937

A bit bright!
 

post #922 of 937

They are. Neither Tyll nor purrin measured their K 701 that bright, but Golden Ears did. Not sure what's up with that.

post #923 of 937

Dunno, seems similar to Tyll's plots when uncompensated. What do you get if you remove the artificial ear?

 

EDIT: Actually it does look a little bit like Tyll's compensated plots but yours have a bit more energy in the tremble (about 5 dB.)
 


Edited by ultrabike - 5/7/13 at 4:35pm
post #924 of 937

My raw uncompensated graph looks very much like Tyll's raw one except with more treble between 5 and 9 kHz or so. I think my measurements do tend to emphasize the treble past 5 kHz by some dB, but even then these K 701 do have a treble peak around 7 kHz for sure since I can hear it as well.

 

The bass measures more like the Q 701, which is curious.

post #925 of 937

Another measurement of the K 701 today, done the same way as before.

 

 

 

More or less the exact same as last time, but the big peak at 7 kHz is gone. I took a couple measurements from different ear positions and the peak was missing from all. Guesses?

 

No burning in was attempted, I played maybe 20 minutes of music through them since the last measurement. Measurement error on the first one is possible, but would be odd that a peak at a certain location would be the only difference.


Edited by vid - 5/8/13 at 1:33pm
post #926 of 937
What is your measuring rig and procedure vid?
post #927 of 937
Quote:
Originally Posted by xnor View Post

How? Made in China + 1000% profit. wink.gif

Beyerdynamic has its production of headphones in Germany and its T1 model has been having problems with the driver/channel matching.

post #928 of 937
Quote:
Originally Posted by vid View Post

Another measurement of the K 701 today, done the same way as before.

 

 

 

More or less the exact same as last time, but the big peak at 7 kHz is gone. I took a couple measurements from different ear positions and the peak was missing from all. Guesses?

 

No burning in was attempted, I played maybe 20 minutes of music through them since the last measurement. Measurement error on the first one is possible, but would be odd that a peak at a certain location would be the only difference.

Did you use the same signal during the second measurement that was used before ? 


Edited by zorin - 5/9/13 at 5:48am
post #929 of 937

Maybe because these drivers are more complex and expensive and so they don't want to pick only the best matching ones and throw the rest away? Instead of taking some very well matching and some badly matching pairs, maybe they choose them to get a more consistent matching even if that means overall worse matching?

 

edit: CSD "measurements" usually are done with special signals, not music.


Edited by xnor - 5/9/13 at 4:41am
post #930 of 937
Quote:
Originally Posted by vid View Post

Another measurement of the K 701 today, done the same way as before.

 

 

 

More or less the exact same as last time, but the big peak at 7 kHz is gone. I took a couple measurements from different ear positions and the peak was missing from all. Guesses?

 

No burning in was attempted, I played maybe 20 minutes of music through them since the last measurement. Measurement error on the first one is possible, but would be odd that a peak at a certain location would be the only difference.

 

It is possible to have measurement variability in the high frequency region depending both on position, pad pressure, and mic placement.

 

Interestingly, only that particular region seems different, the rest seems in line with your previous results.

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