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post #106 of 128
Quote:
Originally Posted by SilverEars View Post
 

 

 

I don't understand the GoldenEar target flat line being there.  Why is it flat?  Sean Olive has a compensation graph for what I believe to be perceived neutral from the ear, and it's not a flat line.

That graph has had the  GE target 'subtracted' from it (i.e. a 'compensated' graph), hence tje target is now a flat line.

post #107 of 128
Thread Starter 
Quote:
Originally Posted by tranhieu View Post  Was the SWFK out just recently? The best tweeter I heard from Knowles was the WBFK but that was a few years back.
Quote:
Originally Posted by MuZo2 View Post   I did not find any tech info on swfk. Do you have a pdf?

 

No publicly available data, but check "Phase 2" here: http://media.digikey.com/pdf/PCNs/Knowles/PCN20131011_TransferReceivers_KEP.pdf

 

It definitely exists, and I'm sure that KA applications engineers will tell clients all about them.

post #108 of 128

Found some information here

Latest BA Woofers & Tweeters
•Woofers CI and NEW HODVTEC
•Tweeters WBFK and NEW SWFK

http://www.head-fi.org/t/709859/multiple-balanced-armature-speaker-systems-with-crossover-networks

 

 

 

 

post #109 of 128
Thread Starter 

Notice how those documents state "Knowles Confidential" ;) (that's why I said "not publicly available")

post #110 of 128
Quote:
Originally Posted by MuZo2 View Post
 

Did you check JH interview. He said all BA roll off at 10khz & thats true so it has limited range.

 

Quote:
Originally Posted by briskly View Post
 

NT6 is spec'ed to go to 18khz, and looking at measurements of a couple of sets, it appears to cut off at 17-18 kHz. Curiously enough, the single driver Hidition ear first appears to have better presence in the top octave, as measured.

 

Since my CK-10 seems very sibilant(I guess sibilance is not the result of extended high range since it's much lower in the spectrum) so I was curious how far the treble goes(but can't say where it rolls off though), and according to AT, it range is 20-15k.  I wonder how far a recording would go?

 

Anyway, CK10 is from 2007 and has dual BA drivers.  Looks like ER4 goes up to 16K.  In order to pick up nuances and details, I wonder what range though would appear.  Also I think have a headphone that would put out full spectrum with good dynamics(not missing some of the small details) is very important within a range recordings are recorded at.  Not sure what sounds would be in that high frequency area.

post #111 of 128

Ok, so I went thought JHA website and checked out the FR of their iems.

 

up to JH11, it's 17K

 

Then the 13 and 16 pros are 20K

 

lastly, Roxanne is 23K

 

We know it's not necessary to go beyond human hearing, but I guess it makes the specs look nicer for newer products if you show that it has higher numbers.  :D


Edited by SilverEars - 4/27/14 at 1:00am
post #112 of 128

Did you check FR how it rolls after 10K .

post #113 of 128
Quote:
Originally Posted by MuZo2 View Post
 

Did you check FR how it rolls after 10K .

Check out the graphs at Inner fidelity and judge for yourself

 

http://www.innerfidelity.com/headphone-data-sheet-downloads


Edited by SilverEars - 4/27/14 at 2:06pm
post #114 of 128
Quote:
Originally Posted by MuZo2 View Post
 

Did you check FR how it rolls after 10K .

According to Golden Ears the SE846 start rolling off at 10k, but  Westone ADV doesn't.  

 

Is the ADV dynamic?  XBA-H3 doesn't roll off like 846 and it's dynamic.


Edited by SilverEars - 4/27/14 at 1:32am
post #115 of 128
Quote:
Originally Posted by SilverEars View Post
 

XBA-H3 doesn't roll off like 846 and it's dynamic.

XBA-H3 is hybrid BA drivers are used for highs & dynamic for low.

post #116 of 128
Quote:
Originally Posted by MuZo2 View Post
 

Did you check FR how it rolls after 10K .

 

Good point.  As I recall, JH talked about the high roll-off beyond a certain Frq.(10K?)  for BA.  Is there BA that doesn't drop drastically at the high end?  Even the ER4 drops drastically around 10K, no?

post #117 of 128
Quote:
Originally Posted by SilverEars View Post
 

 

Good point.  As I recall, JH talked about the high roll-off beyond a certain Frq.(10K?)  for BA.  Is there BA that doesn't drop drastically at the high end?  Even the ER4 drops drastically around 10K, no?

Nope, the ER4S drops below nominal level somewhere around 15.5khz-16khz.

 

BA actually can do a bit higher than that, below is the measurement of my diy universal iems I built sometime ago with the RE400 overlayed on top for comparison, a single driver deisgn of course. With a bit of acoustical tweaking they could 17.8khz before dropping below nominal level. I suppose with more electronical tuning the driver can do 20khz.

 

post #118 of 128

Check the graph of my fav. over-ear which is an ortho.   I'm curious if I'm getting more details with these because of the linear treble extension.  I don't think separation like the HE-6 is possible with iems though.  I keep getting that tinny high end with BA, and feel like there should be more finer treble that goes beyond it, and I know my HE-6 provides these subtle trebles.  Look at this graph of HE-6

 

post #119 of 128
Quote:
Originally Posted by tranhieu View Post
 

Nope, the ER4S drops below nominal level somewhere around 15.5khz-16khz.

 

BA actually can do a bit higher than that, below is the measurement of my diy universal iems I built sometime ago with the RE400 overlayed on top for comparison, a single driver deisgn of course. With a bit of acoustical tweaking they could 17.8khz before dropping below nominal level. I suppose with more electronical tuning the driver can do 20khz.

 

The hump in the high end is getting close to perceived neutral(Sean Olive), correct?  But, yeah, it extends.  I've seen the Sony XBA-H3 which extend good at the high end also.  But, these are dynamic.  Are there others besides ER4 that extend like the dynamics?

 

By the way, how are you extending the treble like this?

post #120 of 128

Are there measurements that show affects of high impedance source on Multi-BA phone output?  I'm wondering if there are anything out there that measures various output impedance sources and multi-BA load with crossovers to show how much the FR skews.

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