Four custom-engineered drivers tailored to blend precisely with each other deliver extended high-end clarity, while the groundbreaking low-pass filter design gives you the performance of a true subwoofer - all without sacrificing a solitary detail. Customize your audio even further with a selection of four unique sound signatures, including a new "extended" option. This is unparalleled aural acuity based on decades of dedication. It's why more musicians trust Shure and true audiophiles fall in love. Detachable cable enables the ability to convert to wireless or integrate other wired accessory options, and a comprehensive sleeve assortment provides a perfect fit. Sophisticated listening for the refined ear.