Bilavideo
Caution: Incomplete trades.
- Joined
- Feb 29, 2008
- Posts
- 3,101
- Likes
- 128
NEW DEVELOPMENTS
1. I took some earmold foam and made foam models of my ear canals.
2. I got some UM3X shells from a friend in Canada who sent in his UM3X to be customized. While I don't want to copy Westone's specific housing design, I think the UM3X provides a good example of the relationship between the shape of customs and its approximation among universals.
As you can see from the only photo I was able to upload (freakin' batteries!) there's not a lot of extra space in the UM3X shell. With the connector wire and a miniature crossover circuit, the housing is used up. This will allow me to pop in the CI-22955 and the TWFK, but nothing more ambitious than that. When I get some fresh batteries, I'll show you the foamy molds I made. They're much more spacious (while avoiding any sacrifice in fit). I think the UM3X goes small, to maximize its fit with lots of ear shapes and sizes. A custom mold allows more expandability.
CROSSOVER UPDATE
I found a pretty cool website with a calculator for determining cutoff frequencies for both high-pass and low-pass filters. It won't tell you what values to plug in for the resistor and cap in an RC filter, but it gives you the ability to see what effect different choices would have. Here it is: http://www.sengpielaudio.com/calculator-RCpad.htm
1. I took some earmold foam and made foam models of my ear canals.
2. I got some UM3X shells from a friend in Canada who sent in his UM3X to be customized. While I don't want to copy Westone's specific housing design, I think the UM3X provides a good example of the relationship between the shape of customs and its approximation among universals.
As you can see from the only photo I was able to upload (freakin' batteries!) there's not a lot of extra space in the UM3X shell. With the connector wire and a miniature crossover circuit, the housing is used up. This will allow me to pop in the CI-22955 and the TWFK, but nothing more ambitious than that. When I get some fresh batteries, I'll show you the foamy molds I made. They're much more spacious (while avoiding any sacrifice in fit). I think the UM3X goes small, to maximize its fit with lots of ear shapes and sizes. A custom mold allows more expandability.
CROSSOVER UPDATE
I found a pretty cool website with a calculator for determining cutoff frequencies for both high-pass and low-pass filters. It won't tell you what values to plug in for the resistor and cap in an RC filter, but it gives you the ability to see what effect different choices would have. Here it is: http://www.sengpielaudio.com/calculator-RCpad.htm