IEM Reviewer Extraordinaire
- May 11, 2004
- Mid Johor, Malaysia
Anyone know what's required to make an ER4B cable? I searched high and low, I know it's also 100ohm impedance just like the ER4S, but couldn't find anything else.
It is in the patent document. Just use Google patent search to find Etymotic's patents and you will eventually come across the ER4 patent. The diagram inside has all the detail.