The Ultimate Ears 11 Pro combines a quad armature speaker configuration with a three-way crossover – an industry first. The UE 11 Pro features a dual driver subwoofer that tightly and fully details the lows, a dedicated driver for the mid range that is dynamic and clean and a tweeter that produces crystal clear highs. The result is a total acoustic immersion that conveys every detail and emotional nuance to the listener. 

Sound Quality. An industry first. Housed within the custom shell, a quad armature speaker system uses an electrically and acoustically tuned three-way crossover to produce an unparalleled sound environment. The Ultimate Ears 11 Pro provides - 26dB of passive noise cancellation.