64 Audio is entering the $1099 price bracket with a phenomenal offering in the 64 Audio U4s in-ear headphone, 64 Audio's most affordable universal IEM to date. The 64 Audio U4s in-ear monitor (IEM) is a 4-driver, hybrid IEM with a powerful Dynamic low-frequency driver that results in powerful punch in the low-end. The U4s is the perfect IEM for anyone looking for a rich, enveloping listening experience. The U4s has bass and treble extension in spades. Notes have a generous sense of weight to their transients due to the strong bass boost and thicker midrange. The U4s also comes with 3 different tuning modules so you can tune them to your liking. The 64 Audio U4s offer's 64 Audio's MX, the new M12 (Only included in launch U4s, no longer included), M15 and M20 modules that will all make varying differences in how you experience the bass and treble on the U4s with the MX being the least amount of bass to the M20 being the most. Flexibility at your fingertips! The 64 Audio U4s is our pick for the top IEM at the $1099 price category. There really is no competition.