Westone Audio MACH 40 Universal IEM — 4-Driver Balanced-Armature In-Ear Monitor

The MACH 40 delivers a consistently even, smooth soundstage—ideal for musicians and listeners seeking highly neutral monitoring. Its internal configuration consists of four balanced-armature drivers (dual lows, a single mid, and a single high) managed by a 3-way passive crossover for clear, accurate frequency division. Connection is via the New Linum® Estron SUPERBaX™ cable, engineered with a low 0.75 Ohms resistance to preserve signal integrity while remaining lightweight. The shells are shaped for ergonomic comfort so you can wear them all day without ear fatigue. Technical specifications: Frequency Response: 10Hz - 20kHz; Sensitivity: 100dB @ 1kHz; Impedance: 30 Ohms @ 1kHz.