[Xymordos]

Personally I'm not a fan of vents on BA either. Tried both and found that I tend to like the sound of the non-vented version better.
 
I compared a CI22955 vented and non vented. Frequency wise the vented version is louder in the bass. But it was only a quick scan since I accidentally removed the solder on the center tap of one of them, and I filled the hole up afterwards, so I don't have a pic. 

 

[tranhieu]

  Any graphs available to see difference of ported vs non ported CIEM, to see effect on the sub bass?

 
 

  Can't you just use Scotch tape to tape it if its too big? 

 
I used blutak, ugly as hell though.

 

[grushaaa]

tranhieu,
Wow, amazing work! Bass like subwoofer! Maybe you give a photo in what place did vented hole

 

[MuZo2]

Just found it
http://www.sonion.com/~/media/Files/Academy/Academy_ProAudio__DocCode_304_V_001_Web.ashx

 

[piotrus-g]

  tranhieu,
Wow, amazing work! Bass like subwoofer! Maybe you give a photo in what place did vented hole

Yeah but you realize the graph presents difference between vented and non vented drivers, right? which means that vented driver improves around 3dB over the non-vented in lowest region.
However in my opinion this still doesn't represent what is happening.
Please check graph below. It's 37A007 and vented version 7C/8, same tubing, brought to 1kHz to show the difference. Measured with IEC-60318-4

 
As you can see there's pretty much no difference in sine-wave graph in bass region other that 1dB difference. Both drivers works flat. However what happens in CSD is another story and that probably counts more.

 

[tranhieu]

Ah I forgot to add both CIs were measured with the same low pass filter.
I suppose the added SPL and the tuning frequency depend on the type of driver and how large the vent is. The 3700 seems to have roughly +6db @ 1.5kHz in that graph.
 
Quote:

  tranhieu,
Wow, amazing work! Bass like subwoofer! Maybe you give a photo in what place did vented hole

Sorry, scrapped them all. It was long ago and I haven't drilled anymore since then.

 

[grushaaa]

Thanks Piotrus.
 
I think most typical driver is sonion 3300. For me this graphics is an indication how to change frequency depending on the size vented hole
 
Sonion 33AJ007i
without vented hole

 
Sonion 33AJ007i/9
have little vented between contact
 


Sonion 33AJ007i/8
have big vented hole


 
I think such holes must approach to knowles DTEC, hes dont make vented driver

 

[piotrus-g]

  Thanks Piotrus.
 
I think most typical driver is sonion 3300. For me this graphics is an indication how to change frequency depending on the size vented hole
 
Sonion 33AJ007i
without vented hole

 
Sonion 33AJ007i/9
have little vented between contact
 


Sonion 33AJ007i/8
have big vented hole

Obviously you are right, but if you brought them to 1kHz the difference wouldn't look that big.

 

[grushaaa]

At what frequency is best to do the intersection crossover so as not to lose the bass? I think the lowest bass should not be affected

 

[Xymordos]

Found these interesting graphs. They are the FR measurements from Unique Melody. Top one is Mentor, bottom one is an universal Angie reshelled by UM. Bass setting was on minimum.
 

 

[robervaul]

 

http://www.aliexpress.com/item/NEW-3-14-HIFI-DIY-in-ear-earphones-dynamic-earbuds-sound-isolating-headphones-free-shipping/32334365071.html

 

[mattmatt]

Hi! I'm having trouble with uploading photos, anyone care to tech me how

Can you also help me determine the pin outs sonion 2023? Am I right, from the view of the solder pads, negative, center tap, positive? Actually, it's from a UE sf.5 pro. I am rewiring it and making a universal shell but got lost with the terminals even with the tweeter terminals

 

[Breezy]

Protip: Don't put a candle wax covered ear impression in the microwave. You'll need a new plate and new eyes.

Protip 2: Ballistics gel doesn't take long to melt if your oven is messed up and only does a higher heat than recommended. Also a release from aluminum foil might not be needed (I'm not sure). Also it's available as as a sample, which is enough for both impressions if you're not a derp.

Protip 3: Make sure your impression doesn't get to close to the bottom of the mold, that weakens it.

 

[dkun7944]

You'll need a new plate and new eyes.

 
So it'll explode? Or turn into the sun?

 

[DingoSmuggler]

Protip: Don't put a candle wax covered ear impression in the microwave. You'll need a new plate and new eyes.

All the things you shouldn't do with a microwave are always the most fun.