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Review by 'headcase442' on item 'Etymotic Research ER6 Isolator In-Ear Earphones (Black)'
I've used these for the past week. They have excellent bass extension but are very deficient in the upper mid, and treble range. I have not tried them with a proper headphone amp since the manufacturer claims they are designed specifically for portable devices (as the average impedance...- headcase442
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