[AONihilist]

I'm feeling really, really bored now that it's my holidays, 3 months of it. I've got some spare BA drivers ripped out from broken IEMs (cable issues or, in the case of my TDK BA200, a busted resistor bulb) and I thought I'd just play with them a little.

Note: This is just for fun. No serious stuff in here. I'm just experimenting and who knows, I'll get something nice out of this.

Anyway, anyone knows how to design/make a passive crossover? I don't want to start building an IEM full of circuits and stuff.

 

[nikongod]

Have you read the DIY-IEM thread? 
 
A passive crossover is (part of) a circuit. 

 

[MuZo2]

 
Can you post pictures of TDK BA200. It uses driver from Sonion which comes with crossover.
http://www.sonion.com/Products/Transducers/Receivers/1723%20AcuPass%20TM.aspx

 

[AONihilist]

   
Can you post pictures of TDK BA200. It uses driver from Sonion which comes with crossover.
http://www.sonion.com/Products/Transducers/Receivers/1723%20AcuPass%20TM.aspx
 

Sorry, not at the moment. I'm at my cousin's house. Staying in for a couple of days and I don't have the drivers on hand. I do know that they have their own circuit, but I just want to experiment with them.

  Have you read the DIY-IEM thread? 
 
A passive crossover is (part of) a circuit. 

I know. I was wondering whether there is a way to shrink it smaller than what I am seeing all over the Net. Also, I'd prefer some links I can have a look at. Thanks.

 

[MuZo2]

In case of IEM and case of TDK BA200 you will have just a capacitor and resitor.
• Caps roll off the LF’s (high pass)
• Resistors in series with Woofers pull out the LF bump
Tweeter: 2323 through  series cap
Woofer : Resistor in series.
You will have to experiment with values

In addition you have acoustic filter which will smooth the response. Damper you will find in stem of TDK BA200
 
 
 

 

[nikongod]

 
I know. I was wondering whether there is a way to shrink it smaller than what I am seeing all over the Net. Also, I'd prefer some links I can have a look at. Thanks.

 
SMT parts? 
 
For example here is a replacement board for the Shure E5c. 

 
No reason you cant air-wire the components though. 

 

[AONihilist]

In case of IEM and case of TDK BA200 you will have just a capacitor and resitor.
• Caps roll off the LF’s (high pass)

• Resistors in series with Woofers pull out the LF bump
Tweeter: 2323 through  series cap

Woofer : Resistor in series.

You will have to experiment with values


In addition you have acoustic filter which will smooth the response. Damper you will find in stem of TDK BA200

What I was originally thinking was to use the BA200's drivers as a springboard and then add drivers around it to improve on the sound. But I'll try your idea out.

SMT parts? 

For example here is a replacement board for the Shure E5c. 



No reason you cant air-wire the components though. 

Air-wire meaning? Directly wiring each to another without the caps and resistors?

 

[nikongod]

Air-wire meaning? Directly wiring each to another without the caps and resistors?

 
You wire the caps and resistors to each other without a circuit board. 
 

  Have you read the DIY-IEM thread? 
 

 
No, I have not, have you? 

 

[tonybuild]

Something like that
Im still Experimenting with this.