ER4SR Studio Reference The World's Most Accurate Earphones Just Got Better! Over 30 years ago, Etymotic invented noise-isolating, in-ear earphones. Etymotic's original design, developed for auditory research and hearing testing, used balanced-armature receivers and established these speakers as the gold standard for high-definition, in-ear earphones. Detachable 5 foot cable High performance balanced-armature drivers Sleek driver bodies with anodized finish Braided cables for reduced microphonic effect Why Etymotic? Etymotic designs products to measure, improve and protect hearing, and enhance the listening experience of music lovers everywhere. Audio engineers, musicians and audiologists at Etymotic have generated over 100 patents issued and pending. Why ER4SR Studio Reference? ER4SR is Etymotic's new reference standard hi-fidelity earphone for those who demand nothing less than the highest fidelity. The next generation of our long-revered flagship earphone, the ER4S, the ER4SR delivers increased accuracy with greater sensitivity. Like its predecessor, the ER4SR channels are precision matched within an industry-leading 1dB across frequencies from 100Hz to 10kHz. The new ER4SR incorporates significant cosmetic and functional improvements, from a sleek, anodized and laser-etched aluminum body to the reinforced, user-replaceable detachable cable. The ER4SR is a must have for discerning engineers, audiophiles, and consumers wanting the most accurate in-ear earphone available. User Detachable Cables To detach the cables, pull the cable connector away from the earphone body. Pull straight out-DO NOT TWIST. To attach the cables, align the key tab on the cable connector with the notch in the body of the earphone. Press together until it snaps in place. Changing the Filters Etymotic earphones have special filters that smooth the frequency response and prevent earwax from entering the earphones. The filters are located at the end of the earphone and are visible when the eartip is removed. When a filter becomes clogged it should be replaced. Filters should be changed when output decreases or sound quality declines. In The Box ER4SR Studio Reference earphones Assorted eartips and 1/4" stereo phone adapter Filter removal tool and replacement filters Shirt Clip and Carrying Case Performance Certificate
