Westone Series In-Ear Monitor Earphones with Single Balanced Armature Driver (w10)
Amazon.com: Westone UM Pro10 High Performance Single Driver Noise-Isolating in-Ear Monitors-Orange, 78392, Pro 10 (UM Pro 10): Electronics
Amazon.com: Westone AM Pro 30 Triple-Driver Universal-Fit In-Ear Musicians' Monitors with SLED Technology and Removable Twisted MMCX Audio Cable: Electronics