 Etymotic Research ER6i Isolator In-Ear Earphones (Black) 6i Isolator Earphones are designed specifically to providing greater sound output and enhanced bass for use with the Apple iPod and other small portable players. Maximum continuous input - 2.5 Vrms Weight - less than 1 ounces |  Etymotic Research ER6i Isolator In-Ear Earphones (White) The 6i Isolator Earphones are designed specifically for use with the Apple iPod and other small portable players, providing greater sound output and enhanced bass. The 6i Isolator Earphones feature in-the-ear secure fit for optimal performance, highly accurate music reproduction ... |  Etymotic Research ER6 Isolator In-Ear Earphones (Black) The ER-6 Isolator earphones provide outstanding sound quality and isolation in a lightweight, compact package. And at less than half the price of ER-4 earphones, they're an incredible value. Because these earphones were designed to match the acoustic response of the open ear, the... |