6-driver balanced armature with passive 3-way crossover, acrylic body with Flex Canal (to ensure maximum comfort and sound quality, the body can also be re-molded if necessary), dual bore, MMCX connector type, 118 dB @ 1mW sensitivity, 8 Hz - 20 kHz freq. response, 46 Ohms nominal impedance, 25 dB passive noise attenuation
Westone triple balanced armature driver 3-way passive crossover custom. 1 High, 1 Mid, and 1 Low drivers.
“ I personally prefer the sound of the "Westone" series to the "UM" products. I use my IEM's for listening to pre-recorded music. The sound of the UM series is very good, but the WESTONE 4R is the closest I have come to the sound of my FOCAL speakers. While the sound was pleasing when using the COMPLY foam tips, the UM56 custom tips took everything up a level. ...” --psych_major
“ http://www.head-fi.org/forum/thread/552996/review-westone-ac2-dual-driver-custom-in-ear-monitor See above for my in depth review. In general, the Westone AC2 is a great addition to the somewhat crowded entry level custom IEM market. It has its own flavor that will surely please some people. What would be the point if Westone just released another UE4pro/LiveWires sounding custom,...” --project86
A great entry level in-ear musicians' monitor, the ES1 contains one full range speaker in each ear and delivers incredible clarity and punch. Recommended for solo vocalists who may be singing to backing tracks, or vocalist/acoustic guitar players. The ES1 is not recommended for drummers or bassists, as it not designed to handle the low end response that is necessary for those...
Stepping up to a fully custom in-ear musician monitor has never been easier than with the AC1. Whether youÕre a seasoned performer, emerging artist or listening enthusiast, WestoneÕs custom-fit technology, cold pour acrylic body, single balanced armature driver, removable EPIC Pro cable all deliver serious value. The AC1 is available only in clear, full acrylic, with Westone...