Etymotic Studio Reference Earphones Model: ER-4SR MSRP: US$349 For decades Etymotic’s ER-4 in-ear earphones have been a gold standard against which others are measured.
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Etymotic Studio Reference Earphones Model: ER-4SR MSRP: US$349 For decades Etymotic’s ER-4 in-ear earphones have been a gold standard against which others are measured.
Read More