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What sets the MACH 60 apart from ordinary earphones is its superior clarity in the higher frequencies
Large and wide extension range
allowing everyone to enjoy a nice
ensuring the longest possible product life for earphones and IEMs
ER4XR What sets the MACH 60Pluses and minuses Reference class detail display. Single Balanced Armature driver for maximum accuracy. Extra sub bass, nicely tuned, but not excessive. Deep fit takes some getting used to. Product description The ER4XR is Etymotic's flagship model: an ultra precise in ear monitor with a subtly enhanced low end for a slightly more musical sound. This eXtended Response version of the ER4 series combines reference class detail reproduction with a touch
