Developed through collaboration with Jerry Harvey Audio, the Jerry Harvey Audio LAYLA IN-Ear Headphones allow you to hear the music how the recording artist and mix engineer intended it to sound, utilizing audio devices such as mobile players, smartphones, tablets, and more. Featuring twelve custom-made dual-low, dual-mid, and quad high-balanced armature drivers per side, the in-ear monitors have a variable-bass output, which is adjustable from the cable, and delivers frequency ranges from flat-bass response up to +13 dB (10 to 100 Hz).