[ForceMajeure]

  I can't find any spec sheets for that ED30761 though.
The ED29689 does look kinda "bad" though. But I guess it is being used as woofer here so perhaps the region the datasheet don't show is good.

Knowles ED30761 is used as the bass driver, it have no spout so the tube is shrink tube.
The ED29689 is "leveled" to the ED30761 spl by using a 20ohm resistor.
Both drivers are us as full range meaning no electrical filtering, only dampers and resistor in series.

 

[FUYU]

I can't find any spec sheets for that ED30761 though.

The ED29689 does look kinda "bad" though. But I guess it is being used as woofer here so perhaps the region the datasheet don't show is good.

Here's a spec sheet for the ED30761: https://dl.dropboxusercontent.com/u/23865811/ED-30761-000.pdf

 

[ForceMajeure]

20 ohm resistor in series to the ED29689 is not a low pass but used just as for lowering the spl full range so it matches the spl of the ED30761.
 
 

Here's a spec sheet for the ED30761: https://dl.dropboxusercontent.com/u/23865811/ED-30761-000.pdf

That's the specs. thanks
 
here are some pics of the drivers https://www.aliexpress.com/store/product/Free-Shipping-2pcs-Professional-DIY-Earphones-ED-30761-Experience-Balance-Armature-Speaker-Earphone-Receiver-from-Knowles/830007_32687339036.html

 

[FUYU]

20 ohm resistor in series to the ED29689 is not a low pass but used just as for lowering the spl full range so it matches the spl of the ED30761.


That's the specs. thanks

here are some pics of the drivers https://www.aliexpress.com/store/product/Free-Shipping-2pcs-Professional-DIY-Earphones-ED-30761-Experience-Balance-Armature-Speaker-Earphone-Receiver-from-Knowles/830007_32687339036.html

Yeah, I just noticed. Corrected it.

 

[ForceMajeure]

Here is a pic of the Savant clone I've been working on!

 
How does it sound?
 
 

anyone can help soldering four wire cable to 2.5mm four pole jack for cayin n5 balanced? I just need to figure what cable goes where? I have occ silver plated four wire cable with 3.5 3 pole

 
Balanced 2.5mm will have 4 individual cables, one right positive and on right ground, one left positive and one left ground.
depending on the 2.5mm plug you will buy you might need to solder them on different places but usually it goes like that
 
 
 
Best to check continuity with a multimeter to be sure where to solder, like what ring is connected to what on the "hidden" part of the plug...
 
There is a diy cable thread also you can ask there they have a lot more experience than me http://www.head-fi.org/t/676402/diy-cable-questions-and-comments-thread/5865#post_12881592
 
Also it looks like different players/amps will require different configurations f.e Astell and Kern 

More info here http://www.diyaudioblog.com/2016/02/headphone-connectors-pins-pinouts-for.html
 So you should take into consideration where you want to plug your cable also
 
 

Yeah, I just noticed. Corrected it.

 
 No problem, we don't mind here this is a friendly place

 

[Shilohsjustice]

How does it sound?

Awesome, I'm rather intrigued by its large sound! Simple can be better, and this setup has proven that! Has a very spacious sound and is well balanced, it would be a great setup for mixing sound or as a reference monitor as it's easy to listen too. The drivers still need to go through burn in but I had them in for a couple hours last night and my ears didn't fatigue at all. I would highly recommend trying this setup out as it's an easy build. I was also able to stretch my acoustical tubing around the tip of the ED-30761 by heating it up and expanding it with tweezers. You can make that out if you look closely at the pic.

 

[mikkelmmk93]

 

  Knowles ED30761 is used as the bass driver, it have no spout so the tube is shrink tube.
The ED29689 is "leveled" to the ED30761 spl by using a 20ohm resistor.
Both drivers are us as full range meaning no electrical filtering, only dampers and resistor in series.

Hmm, the datasheet I looked apparently was for the wrong driver.
Is the following image correct?

 

 

[ForceMajeure]

yes

 

[mikkelmmk93]

 

 

  yes

So eh, where does the treble come from then ?

 

[ForceMajeure]

Those measurments were made with the IEC126 coupler and are accurate from 200hz up to  5khz according to Knowles.So you have to take this into consideration.
also the ED 29689 is the same driver used in the etymotic er4 so it have a some treble output.
 
The thing is that most BA drivers don't have high extension treble with enough spl from 10k and above.
Some drivers are design to output more spl at treble ranges but most of them don't have a strong presence at high treble ranges.
There are some things that can be done to extend the treble like horn shaped nozzle like in the fitear togo 111 that uses a titanium acoustic horn.

 

[mikkelmmk93]

  Those measurments were made with the IEC126 coupler and are accurate from 200hz up to  5khz according to Knowles.So you have to take this into consideration.
also the ED 29689 is the same driver used in the etymotic er4 so it have a some treble output.
 
The thing is that most BA drivers don't have high extension treble with enough spl from 10k and above.
Some drivers are design to output more spl at treble ranges but most of them don't have a strong presence at high treble ranges

Ah ok thanks!
Well guess I can only get smarter by asking then
Hmm, so how does one get good treble response? By using a "dedicated" BA as tweeter - ie. one that is suited for that? or?

 

[ForceMajeure]

I would suggest to hear it first, Have you heard the etymotic? Lots of people will tell that they have enough treble for them.
 
There is the WBFK SERIES from knowles that are design to give high treble outpout.
 
Also when making an highpass filter on the appropriate driver it will give you less impedance in the treble range of it, allowing "more output" at that range because of the impedance characteristic of balanced armature that is not linear and usually rise at higher frequencies. Making an highpass filter will lower the overall impedance of the driver allowing only one part of it to be used. Less resistance on the higher range thus more output on that range.
 
I would highly suggest to hear the driver though. Unfortunatly you cannot draw conclusions about how the final product will sound by looking at those knowles graph's sheets and try to visually add them.

 

[Shilohsjustice]

Using a "dedicated tweeter" would assist in achieving that for sure like a twfk or wbfk with a high pass filter.

Full range BA's are capable of achieving exceptional treble. The ED-29689 is a great sounding example. The ED-30761 and ED-29689 combo in my opinion sound hands down better than my um pro 30's and ue900s and both of those have a dedicated tweeters.

 

[Shilohsjustice]

Using a "dedicated tweeter" would assist in achieving that for sure like a twfk or wbfk with a high pass filter.

Full range BA's are capable of achieving exceptional treble. The ED-29689 is a great sounding example. The ED-30761 and ED-29689 combo in my opinion sound hands down better than my um pro 30's and ue900s and both of those have a dedicated tweeters.

Not to mention it was assembled by me , makes me appreciate it more!!

 

[ForceMajeure]

Not to mention it was assembled by me , makes me appreciate it more!!

You make me want to buy those 30761