The sequel to the popular KZ ZS5, the Z6S continues the company’s history of producing some of the best values in IEMs today. This model features four drivers (two dynamic units and two balanced armatures) and a sturdy aluminum-alloy shell—qualities that are extremely rare in an IEM of this price. The driver layout gives the Z6S an impressive soundstage, and its 15-ohm impedance allows it to be easily driven by smartphones and other low-power sources. It comes with a removable cable and two pairs of ear tips to make sure you get the right fit.