I have ordered these diy k3003, they look nice, expensive, but I figure the balanced armature's are not cheap. And there are 4 in total.
http://www.aliexpress.com/item/Improved-Version-Better-Than-IE800-IE80-IE8-HIFI-in-ear-ceramic-earphone-earbud-headphones-enthusiast-headset/32439793220.html
I'm looking forward to trying them out.
4 in total? I thought that this are hybrids, 2BA + 1D?
2x BA on the left + 2x BA on the right = 4 in total, plus one dynamic driver per side.