you can't find a sound isolating IEM for $100. usually it starts at $200+ there's a good review in this forum: http://www.head-fi.org/forum/thread/478568/multi-

you can't find a sound isolating IEM for $100. usually it starts at $200+ there's a good review in this forum: http://www.head-fi.org/forum/thread/478568/multi-iem-review-105-iems-compared-phiaton-ps210-yamaha-eph-50-pioneer-clx50-added-09-08 http://www.head-fi.org/forum/thread/478568/multi-iem-review-...