Headphones — Koss KEB15i

The Koss KEB15i is a wired in-ear earphone with an angular, lightweight housing and an angled port meant for all-day wear. It is sweat resistant and aimed at running, cycling and gym sessions, and it ships with three sizes of soft silicone cushion (S, M, L).

Key specs that matter

Frequency range is quoted as 18 - 20,000 Hz. Impedance is 16 ohms and sensitivity is 110 dB SPL, so a phone or portable player drives it without an external amplifier. The straight, dual-entry cord is 1.2 m long and ends in a 3.5 mm plug.

Engineering and use context

A One Touch remote on the cord combines a microphone and push-to-talk button and works with any smartphone for calls. Koss covers the KEB15i with its Limited Lifetime Warranty, and it comes in several colours.