My name is Juan, from Mexico. I've been lurking around the forum for a while now lol, but never actually posted (time to give back some useful information). I found out something interesting regarding the XBA-3's. I have noticed that this IEM (and the XBA-4 too) is prone to a weird moisture problem that causes a significant volume drop (left earpiece in my case). It seems to happen whenever I wear them for an extended period of time, 3+ hrs. My left is ear produces more wax than the right one, thus humidificating the insides of the left earpiece. There's apparently a similar issue with the Shures E3C, according to this thread http://www.head-fi.org/t/464760/volume-loss-on-left-side-of-shure-e3c-ear-phones (last two posts) So if any of you comes accross this problem, just let the IEMs rest for a while and everything will be back to normal. Hope someone finds it useful.
welcome Juan from Mexico. Glad you finally posted. sfwalcer was wondering who the guy lurking in the shadows staring was? As for the XBA-3/30's, I'd find the fact they are probably the most sub-par triple ba driver available on the market far more disturbing than the tendency for them to left ear diminish while sweating and long term listening? That you give these average suckers long term listening marathons is also more surprising. I sold mine pair as fast as I could, when i realized during an a/b comparison, that my one BA Altec Lansing's were smacking the 30's around in detail resolution, bass presence, and thickness of mids. Not to mention, what is up with that "metallic" treble??? I'm a human, not a robot! lol Anyway, sorry you're experiencing these types of issues with your iems. I'm lucky, since I use my FXT90's and my Altec Lansing's for workouts, and both of those are so super built, they never give me any issues regardless of sweat.