Letshuoer DZ4 HiFi IEM

A high-quality IEM requires both top-tier engineering and a focus on functional design—after all, getting such finely tuned audio components into a space this small requires focus and attention to detail. The Letshuoer DZ4 is an excellent example of both, featuring not only an intentional selection of components, but also an intricate focus on layout and design. Inside each earphone, there are three, 6-millimeter titanium dome drivers and an R-sonic passive filtering module that work together to deliver well-balanced, detailed sound. There’s also a four-way acoustic tube array and a two-way crossover circuit to help balance out the three identical drivers so you can count on getting all that detail without interference. It all sits in a CNC-milled aluminum and 3D-printed resin shell with partial openings to help with acoustic response and resonance. Completing this carefully considered package, the DZ4 ships with a four-core, silver-plated copper cable with 2-pin connectors and a 3.5-millimeter termination for standard compatibility and a full audio offering right out of the box.