[Rabid86]

Thank you for the reply! I don't fully understand these things, I am very bad with electronics in general. I was just following this page and the diagram they have there. Maybe I connect everything wrong... http://www.learningaboutelectronics.com/Articles/Notch-filter-calculator.php#answer1

How am I supposed to connect these?

 

[Dulalala]

Thank you for the reply! I don't fully understand these things, I am very bad with electronics in general. I was just following this page and the diagram they have there. Maybe I connect everything wrong... http://www.learningaboutelectronics.com/Articles/Notch-filter-calculator.php#answer1

How am I supposed to connect these?

Removed*

 

[Rabid86]

You want a band pass filter right? You can just wire a low pass filter into a high pass filter or vice versa.

I want a band-stop filter. To notch out a frequency between 2kHz and 5kHz. I can use the lowpass-filter okay by itself, like I connected it in my diagram. And I can use the highpass-filter okay aswell by itself, also like on the diagram. But when I connect both of them together like in the pictures, it only makes the low frequencies come through. I want it to carve out the "bad" frequencies that I want to tame as much as possible. I can show a measurement of the driver without any filtering and you will understand why I want to remove this.

 

[Dulalala]

I want a band-stop filter. To notch out a frequency between 2kHz and 5kHz. I can use the lowpass-filter okay by itself, like I connected it in my diagram. And I can use the highpass-filter okay aswell by itself, also like on the diagram. But when I connect both of them together like in the pictures, it only makes the low frequencies come through. I want it to carve out the "bad" frequencies that I want to tame as much as possible. I can show a measurement of the driver without any filtering and you will understand why I want to remove this.

Oh right, ok if you want a band stop then just wire the low pass filter in parallel with the high pass filter.

 

[Rabid86]

The thing is, I thought I already did the same as on this diagram:

I don't exactly know how I am supposed to connect the components in the right order...
What is the difference between mine and this exactly?

 

[Dulalala]

The thing is, I thought I already did the same as on this diagram:

I don't exactly know how I am supposed to connect the components in the right order...
What is the difference between mine and this exactly?

Well I honestly have no clue what you did. You put a resistor in parallel with a capacitor, then connected them together into another resistor in parallel with another capacitor and the transducer.

It's not the prettiest or neatest but you can just follow what's below. It's basically the same thing as what you just posted above, just in an easier way to understand I guess?

 

[Rabid86]

That is exactly what I needed! Thank you very much! As I said, I am very bad with these things.

I will try your diagram right away!

 

[Dulalala]

I want a band-stop filter. To notch out a frequency between 2kHz and 5kHz. I can use the lowpass-filter okay by itself, like I connected it in my diagram. And I can use the highpass-filter okay aswell by itself, also like on the diagram. But when I connect both of them together like in the pictures, it only makes the low frequencies come through. I want it to carve out the "bad" frequencies that I want to tame as much as possible. I can show a measurement of the driver without any filtering and you will understand why I want to remove this.

That being said though, that peak you're speaking of between 2 kHz and 5 kHz is normal. I'm pretty sure the frequency response curve is just an uncompensated one.

If you look at the Harman target curve, you'll see that for perceived neutrality, or at least what Harman considers to be, there is a peak between the given frequencies:


Even the HD800S has one:


So I'm not sure why you're trying to get rid of it.

 

[Rabid86]

Well, the measurement is my own. And I used a compensated curve aswell. I have the Veritas II measurement microphone from this place: https://diyearphone.com/products/veritas-ii

I used their own correction curve linked in that page. I know that the response seems exaggerated, but this sound is absolutely earbleeding! Without a filter it is impossible to listen to.
It is the nature of these drivers it seems. But it is also the cheapest balanced armature driver I could find, otherwise it would have been to good to be true.

 

[Dulalala]

Well, the measurement is my own. And I used a compensated curve aswell. I have the Veritas II measurement microphone from this place: https://diyearphone.com/products/veritas-ii

I used their own correction curve linked in that page. I know that the response seems exaggerated, but this sound is absolutely earbleeding! Without a filter it is impossible to listen to.
It is the nature of these drivers it seems. But it is also the cheapest balanced armature driver I could find, otherwise it would have been to good to be true.

I might be wrong but I think the correction curve they've given is for the microphone calibration, not for perceived neutrality. Either way, does your design comprise of more than one transducer? If you don't have another driver to compensate for the missing frequency, I'm going to assume it's going to sound very odd.

 

[Rabid86]

Thank you for the information! I am well aware of what kind of a sound I am after, and this is a big learning process for me.
Though, I am very excited for it! Because I know that I can make this driver sound great with the right tools. I just need some help and inspiration to get there. I couldn't figure this out on my own, so that is why this forum is so amazing!

I can show you another measurement of a pair of dynamic-IEMs that I measured aswell. It is not nearly as bad with those frequencies, so it may be the driver itself that is the problem.


Maybe I am totally wrong with this, you are probably right about the correction curve. I will see what other settings I can use to re-measure these.

Again, thank you very much for the help!

 

[Dulalala]

Maybe I am totally wrong with this, you are probably right about the correction curve. I will see what other settings I can use to re-measure these.

There isn't really a need to compensate it for perceived neutrality, so long as you're aware that there is supposed to be a curve there, just maybe not as intense.

hank you for the information! I am well aware of what kind of a sound I am after, and this is a big learning process for me.
Though, I am very excited for it! Because I know that I can make this driver sound great with the right tools. I just need some help and inspiration to get there. I couldn't figure this out on my own, so that is why this forum is so amazing!

Did you consider using acoustic filters instead of electrical filters? If the issue is a peak I don't think electrical filters are a good solution to that.

 

[Rabid86]

There isn't really a need to compensate it for perceived neutrality, so long as you're aware that there is supposed to be a curve there, just maybe not as intense.

Did you consider using acoustic filters instead of electrical filters? If the issue is a peak I don't think electrical filters are a good solution to that.

Yes, it is definitely not THAT bad, but it is good to be able to see where the problem area is more clearly.

I did use knowles and sonion filters, but I got better results using toilet paper. Though, either filters made the sound to be veiled.
Here is another measurement with acoustic filtering:



I did not care too much for the sound, even though it is not earpiercing anymore.

Now I will take a break for the night. I will get back to this with a fresh mind tomorrow morning!

Thank you very much for all the help!

 

[AudioObsession]

Hi, Do any of you guys know of a good source (In the USA) for purchasing Dynamic Drivers?
Preferably high quality, featuring Biological diaphragm, or Beryllium, or Carbon nano-diaphragm, Graphene would be nice as well..
Anybody know where I can find something like this in the USA???
Thanks so much for your time!

 

[AudioObsession]

Also: I did find this store here that sells them (along with a bunch of other really cool DIY parts):
https://greensense.aliexpress.com/store/323026?spm=2114.12010608.0.0.398a2fa5VmpSUX
But, I HATE shopping at AliExpress because it takes forever for your order to arrive, -IF- it even does arrive.

That said; I may have no other choice, so the next question is:
Has anyone here ever had any experience with the above seller (Chitty's Store) on AliExpress?

Thanks!