The IE-20 XB professional reference earphones use the same revolutionary Ultimate Ears technology trusted by top touring artists and their sound engineers -- and feature enhanced bass designed for music that is normally monitored on systems with a subwoofer. The IE-20 XB benefits from a dual-speaker design with integral crossover: The dynamic low-frequency driver delivers full, punchy bass while the precision-balanced armature driver provides crystal-clear mid-range and high frequencies.
