Headphone Room

 Ah, how the times change. When I reviewed Etymotic Research's ER-4S in-ear headphones in the July 1995 Stereophile, they seemed expensive to me at $330, but well worth that seemingly high price: at the time, they were the best headphones I'd heard. Nowadays, with reference headphones costing well north of a kilobuck, the price of the ER-4S seems relatively reasonable. Conventional audiophile thinking would have Mead Killion, PhD, who founded Etymotic Investigation in 1983, introducing a new flagship model to take advantage of the new price paradigm. But Killion isn't so much an audiophile as an audiologist, with multiple patents on hearing aids and hearing-aid amplifiers to his...

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