I have only tried using water-based agar investments and it did get kind of watery(may be improved using different recipe?), if you leave the water in there your shell will end up missing that portion where the water stays, haven't tried wiping it since I wanted to avoid getting dust in the...

I like technical terms especially those used in the industry  

I think the problem is that he is currently placing the lighter side of the cover facing the investment and is reflecting UV light to the top part of the shell, which can be fixed by taping the other side of his cover  

1) 72,784 2) 76,521 3) 75,431

By flat response curve I assume you are comparing it to some $1 earbuds?

Nice vid, but what's the purpose of applying wax using a brush before dipping the impression?

Thanks I guess I'll have to try doing the process with the canal pointing up.

Is there any tricks to getting a uniform coat of wax on the impression? I have tried heating the wax to different temperatures but some parts just hold the wax better and result in a thicker coat.  

Quote:   This, you can try using eartips with a small enough diameter to create a seal with the tube then you will get closer to what it should sound like.

Tip of the day: Have good ventilation when working with uv resin (and probably other types of resins) as long term exposure to its vapor can cause illness

I have finished making my first pair with ED29689 but the the right side is much quieter than the left side from 20-1khz, is it possible that I have overheated the driver? The seal is perfect so it is definitely not the seal. 

Have you guys considered tapping into the headphone market?

Thanks FiiO!

My (unrealistic) goal is anything between these 2 curves. Also is there any differences between soldering the cap directly on the driver like the proprietary drivers and connecting them by wires like your design?  EDIT: I tried the TWFK without caps and they sound pretty decent, how does adding...