I received a pair of SoftWear custom fit sleeves for my Ears Model EM3 earphones from Future Sonics this weekend and they're outstanding. Wether you're a music snob or just like a little extra kick in the low-end frequencies coming out of your iPod, you definitely should investigate custom fit sleeves.

The first part of the process is to make an appointment with a certified audiologist in your area to have them make ear impressions (look up Audiologist and your zip code in Google to find one.) Shout out to Certified Audiology in Linwood, NJ that did mine. Impressions cost me US$25 per ear (or US$50) although your mileage may vary. To make them they insert a foam "dam" that is attached to a string deep into each ear. Then they pump a purple silicone substance from something resembling a caulking gun into your ear. While it sets (about a minute) you alternate saying "ahhh" and "eeee" to get the best fit.

Once your impressions are made you mail them to Future Sonics with a check for US$135 and about a week or two later your custom sleeves arrive via UPS. I removed the stock foam sleeves from my EM3's and replaced them with my new customs and the difference is noticeable. The first thing I noticed is that they fit snugly and won't wiggle out or hurt my ears. The best thing is that they make the EM3's sound even better than with they do with the stock foam sleeves. Outside noise is further reduced and bass response is ratcheted up another notch—without increasing the volume.

I can't emphasize that last part enough. Good sound doesn't mean loud sound. You shouldn't have to pump the volume all the way up to hear the detail in your music. The amazing thing about using a good pair of earphones is that I actually listen to my music on lower volume than with a cheap set.

The custom sleeves also fit XtremeMac's new FS1 earphones (which I reviewed last month) but not perfectly. I'm told that Future Sonics is working on special tools and will be offering custom sleeves specifically for them soon.

Custom fit sleeves from Future Sonics sound amazing and feel great in the ear, if you're into fidelity you should order yourself up a pair. It's no wonder so many pro musicians use these things.