64 Audio U4s

The 64 Audio U4s is a universal-fit, four-driver hybrid in-ear monitor that brings the company's patented tia, Apex and LID technologies down to a more accessible price. A dynamic driver handles the low end, two balanced armature drivers cover the mids, and a tia high driver adds an open, airy top end. An electrical low-pass filter in the four-way crossover replaces acoustic dampers to cut low-frequency distortion, and the tuning aims for tight sub-bass, balanced mids and a smooth, non-fatiguing treble. The Slate Blue aluminum shell has a meteorite-inspired faceplate, and the kit includes interchangeable Apex modules, three types of ear tips and a low-impedance silver-plated copper 2-pin cable.