The U Series by 64 Audio comprises a range of IEMs, including the eight-driver U8 and the 10-driver U10. Specially designed to fit all ear types, each model comes with silicone and foam ear tips of different sizes. Perhaps best of all, the series is made with apex technology, which not only improves sound quality but also reduces your risk of ear damage. That’s because it’s designed to relieve air pressure in the ear by way of a pneumatically interactive vent. Ideal for professional musicians and those new to the audiophile world, these noise-isolating IEMs are compatible with both monitoring systems and personal listening devices. To learn more, check out 64 Audio's site and this Head-Fi review.