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Home-Made IEMs - Page 106

post #1576 of 2335
Quote:
Originally Posted by Nyanman View Post

How can I swap the damper out? Is it reversible? Where do I order from?


yes. You can buy them from mouser or digikey

post #1577 of 2335

I have one question. 

When my UV acrylic cured, the surface is still quite oily or sticky. 

How do you guys solve this problem? Did you use anything to wash it? 

post #1578 of 2335

That's known as an  "inhibition layer". Use an organic solvent to get rid of it and follow the instructions.

post #1579 of 2335
Quote:
Originally Posted by Cryok95 View Post
 

That's known as an  "inhibition layer". Use an organic solvent to get rid of it and follow the instructions.

Do you know any name of the organic solvent that can use? 

post #1580 of 2335
Quote:
Originally Posted by RealSpark View Post
 

Do you know any name of the organic solvent that can use? 


Glycerin

post #1581 of 2335

guys, what is the material used to make the hard shell? (aside from the UV cure-able resin)

post #1582 of 2335
Quote:
Originally Posted by TimOgawa View Post
 

guys, what is the material used to make the hard shell? (aside from the UV cure-able resin)

Cold cure acrylic,Dental acrylic also can be used.

post #1583 of 2335
Quote:
Originally Posted by piotrus-g View Post
 


Glycerin

 

I don't think glycerine is an organic solvent. The inhibition layer forms on the part that is in contact with the atmosphere.

Glycerine is used to provide an atmosphere free environment(i suspect it's probably due to oxygen or smth) so the inhibition layer does not form. That's why some companies use a machine that cures the shell in an inert gas atmosphere to prevent the formation of this sticky layer.

 

You can try ethanol or lighter fluid.

post #1584 of 2335
Quote:

Originally Posted by Cryok95 View Post  I don't think glycerine is an organic solvent. The inhibition layer forms on the part that is in contact with the atmosphere. Glycerine is used to provide an atmosphere free environment(i suspect it's probably due to oxygen or smth) so the inhibition layer does not form. That's why some companies use a machine that cures the shell in an inert gas atmosphere to prevent the formation of this sticky layer. You can try ethanol or lighter fluid.


Glycerin is, in fact, organic. I don't know whether it'll solvate the layer better than other solvents, but it is definitely an organic solvent by definition, and is less polar than most linear chain alcohols.

post #1585 of 2335
Quote:
Originally Posted by tomscy2000 View Post
 


Glycerin is, in fact, organic. I don't know whether it'll solvate the layer better than other solvents, but it is definitely an organic solvent by definition, and is less polar than most linear chain alcohols.


Hmm okay that i did not know. I just thought it was some sort of water based emollient. Well, this explains quite a bit.

post #1586 of 2335
Quote:
Originally Posted by Cryok95 View Post  water based emollient.

 

It is indeed used in a lot of soaps and skin cleansers, but that's glycerin soap, which contains more than just the glycerol.

post #1587 of 2335

let's just say that glycerin or glycerin based liquids (f.e. Glysol) are used by most IEM manufacturers and are recommended by companies like Dreve for the most basic type of UV curing (without gas)

post #1588 of 2335
Uff... I went through the entire thread. Interesting. I will search for more information on particular topics on the web.

However, one questions still bothers me - I understand that one BA may be lounder from another BA in the bass region, that one may balance the sound between woofer and tweeter if there is a diference in loudness, but how one can change the way a given woofer/tweeter sounds like i.e. how come one IEM has a tight and punchy bass with quick attack and the second has a slow, dynamic like bass? Can this sound characteristics of a woofer be changed? Or simply one has to take proper BA which means that altough one BA has similar graph in bass region in comparison to other BA they can have far way diferent type of bass?
Can someone please explain this to me?
Edited by shakur1996 - 1/24/14 at 9:44am
post #1589 of 2335
From my understanding bass quantity and quality can be determined by a number of factors including tube length and diameter, with a narrow diameter being preferred. Also venting, filters (dampers), number of drivers, size of drivers, and crossover points factor in as well. Don't have much experience in experimenting with these though, just based on some extensive research.
post #1590 of 2335

to use gylcerine: after the initial cure, re cure them submerged in a clear glass bowl of glycerine

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