[Xymordos]

 
rather not enough.

 
 My drivers setup was a dynamic + BK21610 + WBHC + WBFK30095. I would have thought that this combination would give enough impedance. Would it be due to the band pass filter on the WBHC?

 

[piotrus-g]

   
 My drivers setup was a dynamic + BK21610 + WBHC + WBFK30095. I would have thought that this combination would give enough impedance. Would it be due to the band pass filter on the WBHC?

You have probably too big impedance swing in the set up. I assume you have dynamic as a full range electrically? how many Ohm does it have?

 

[tomekk]

 First set. The first pancake is always spoiled 

 
 
UE600 driver, probably a Knowles BK, or something similar. First impressons - Yes they fit! It is true that a lot of things to do, to improve comfort, but I can finally test my thing. By the way, there is a tube 2/3 mm with a length of 14mm. Is this a good idea in single driver? 
 
 
Further objects: impressions from the audiologist (the end of homemade impressions), time to finish with UV nail Gel (I still have to complete several sets of UV gel for skill), TF10 reshell etc...
 
I'm not finished the polishing, but the weekend is over so... 
 

 
 

 
 
Red/orange it is reshell. No dampers in both.
 

 

[Xymordos]

 
You have probably too big impedance swing in the set up. I assume you have dynamic as a full range electrically? how many Ohm does it have?

 
The seller of the driver told me it was 16ohms. I used a low pass filter on the driver electrically, with a 10ohm resistor in series.

 

[MuZo2]

The seller of the driver told me it was 16ohms. I used a low pass filter on the driver electrically, with a 10ohm resistor in series.

Did you try using impedance adapters?

 

[UNOE]

GK-31732

How does this driver compare to 1964 drivers or UE? My friends building me some with this driver. Also how does the "HE" dual driver sound to others on the market?

 

[piotrus-g]

   
The seller of the driver told me it was 16ohms. I used a low pass filter on the driver electrically, with a 10ohm resistor in series.

So you have a situation where you get 26 Ohms at the lows followed by highly inductive 100+ Ohms woofer and midrange drivers followed by very low impedance WBFK.

 

[Xymordos]

oh I see..what exact negative effects would that have? :/

need to remember not to do that next time..

 

[piotrus-g]

oh I see..what exact negative effects would that have? :/

need to remember not to do that next time..

The one you observed, you get impedance mismatch with different sound sources.

 

[Xymordos]

 
The one you observed, you get impedance mismatch with different sound sources.

 
Oh...is there a set pattern to this though? i.e. must have a very low output impedance? Or would it be completely random.

 

[piotrus-g]

   
Oh...is there a set pattern to this though? i.e. must have a very low output impedance? Or would it be completely random.

Depends on crossover design and drivers. I would guess that in your case the muddy (more bassy) sound is result of high output impedance.

 

[Xymordos]

 
Depends on crossover design and drivers. I would guess that in your case the muddy (more bassy) sound is result of high output impedance.

 
Interesting...ZX1 is a Class D amplifier, not sure how its output impedance works  
 
My home amp is the HA5000 which is fine. I actually tested it on my friend's iPhone and it was also fine, quite odd.
 
Dynamic 8mm - 26ohm
BK21610 - 165ohm
WBHC23910 - ~60ohm (resistor in parallel)
WBFK30095 - 14.5ohm 
 
I guess it is due to the BK driver then Lesson learnt for future designs, thanks Piotrus!

 

[piotrus-g]

   
Interesting...ZX1 is a Class D amplifier, not sure how its output impedance works  
 
My home amp is the HA5000 which is fine. I actually tested it on my friend's iPhone and it was also fine, quite odd.
 
Dynamic 8mm - 26ohm
BK21610 - 165ohm
WBHC23910 - ~60ohm (resistor in parallel)
WBFK30095 - 14.5ohm 
 
I guess it is due to the BK driver then Lesson learnt for future designs, thanks Piotrus!

It's not really that simple as crossover changes impedance curves quite a bit. So it's not just BK driver it's general implementation of all drivers
I would advise you to just build impedance measuring rig (super cheap to build) and use it for future projects it will help you predict how design will behave with different sound sources.

 

[Xymordos]

 
It's not really that simple as crossover changes impedance curves quite a bit. So it's not just BK driver it's general implementation of all drivers
I would advise you to just build impedance measuring rig (super cheap to build) and use it for future projects it will help you predict how design will behave with different sound sources.

 
I actually have one - one was given to me when I bought the IEC711, but was too lazy to figure out how to use it :\ I better go learn about it haha
 
Thanks for your help though!

 

[piotrus-g]

Hey Guys, there's been a lot of questions re CI-30120 which is not listed on KA website but it's widely available on taobao and aliexpress.
 
We are working on some IEM that had those drivers so I figured I will share
Rdc=16 Ohm
Z= 28 Ohm @ 1kHz

 
It has slightly different output than standard CI-22955. Measured with 16mmx2mmID tubing.

 
 
CI-30120 seem to be more full-range driver with first peak moved to 3.5kHz
 
Hope that helps anyone.