Etymotic ER3 SE/XR Noise-Isolating Earphones (Open Box) block from discounts This means you can now

This means you can now stream virtually any audio source

at 1 kHz Frequency Response

Noise Cancelling: Adaptive active noise cancelling

Natural and accurate reference sound

Single-ended Headphone Output

Etymotic ER3 SE/XR Noise-Isolating Earphones (Open Box) block from discounts This means you can nowER3SE XR Earphones Quick Overview In ear Invented here: The ER3SE Studio Edition provides a high level of sensitivity, making it a perfect match for the portable media players on the market today. The ER3SE offers audio professional grade sound reproduction at an affordable price. The ER3XR Extended Response offers a modest bass boost, building on the sound quality of the ER3SE, while providing a slight bass boost for those listeners that prefer a