Ultimate Ears has introduced its UE-11 Pro earphones, a new flagship model replacing the UE-10 Pro and featuring a quad armature speaker configuration. The UE-11 Pro features a custom shell with the quad speaker configuration inside, a dual driver subwoofer for more clear low-end performance, a dedicated midrange and separate tweeter, and an electrically and acoustically tuned three-way crossover. Specifications include a frequency response of 10Hz to 16,500 Hz, -26dB of noise isolation, and input sensitivity of 119dB at 1mW.

The Ultimate Ears UE-11 Pro earphones will be available in a variety of colors with individual artwork and will be priced at $1150 when they go on sale August 1. iLounge’s initial impressions can be found here.

Updated: Ultimate Ears notes that it will offer the user’s choice of custom colors and artwork for the UE-11 Pro—typically costing up to $200 above the price of its standard custom earphones—at no additional charge for the first 60 days of the product’s launch, ending September 30, 2007. Customers should expect a three-week lead time for color- and art-customized UE-11 Pros, versus two weeks for standard ones.