Seems like a few of you have problem with your ER4 cable. I wonder - will there be any interest if I offer my service for free to build you guys the same cable I have (http://www.head-fi.org/t/538615/if-you-still-love-etymotic-er4-this-is-the-thread-for-you/6885#post_12242398)? You will only be paying for cost of parts and shipping of course, but parts cost will be less than US$40 for sure, including the adapter, cable guide and SPC cable from Lunashops, plus a pair of SMD resistors. Shouldn't be a problem of you want either P, S or B version. Just one thing - While my measurement does indicate they should be identical sounding to the original cable, I don't claim you will hear the same thing.
If you are interested, PM me. If there is enough interest, i'll start a for sale thread and we can go from there.