Наушники — Koss KSC22i

The KSC22i is the sport oriented member of the Koss ear clip family, built around what the company calls its SportClip design with soft, pliable clips and an in-line microphone. Koss lists it at USD 19.99, above the USD 9.99 KSC21 and below the KSC75 at USD 24.99 and the KSC35 at USD 44.99. Koss calls it lightweight and customizable for workout sessions, and backs it with the Limited Lifetime Warranty used across its wired ear clip models.

Key specs that matter

Koss rates the response at 60 Hz to 20,000 Hz, which reaches 2,000 Hz higher than the 18,000 Hz ceiling of the KSC21 while starting 10 Hz above its 50 Hz lower limit. Nominal impedance is 16 ohms, the lowest in the wired ear clip line, and the sound pressure level is given as 98 dB. The cable is straight with dual entry, meaning a lead runs to each earpiece, and measures 1.2 m. It ends in a 3.5 mm TRRS plug, the four contact type that carries the microphone signal alongside left and right audio.

Engineering and use context

The i suffix marks the in-line microphone, which lets the KSC22i take phone calls while it stays on the ears. The four pole plug is what makes this possible, since the extra contact returns the microphone signal to the source. The clips themselves are made from a soft, pliable material so that the wearer can shape them around the ear, which is the customizable element Koss refers to. The SportClip name signals that the model is aimed at running, gym work and other activity where a headband could shift or fall off. Unlike the KSC21, KSC35 and KSC75, which use pivoting ear plates with foam cushions, the KSC22i relies on the flexible clip to hold each earpiece in place. Koss does not publish a distortion figure for this model.

Pairing

The TRRS plug suits smartphones and tablets that accept a headset with microphone through a single headset socket. This low impedance paired with the sensitivity rating is a combination intended for the low output of phones and portable players. The cable length is the same as on the other wired ear clip headphones from Koss. Buyers who want to drop the cable entirely can look at the KSC35 Wireless, which adds Bluetooth 5.2, USB-C charging and a rated 18 hours or more of playback, together with an in-line remote for play, pause, volume and call handling.

Alternatives

Koss also offers the wired KSC35 ear clip headphone, rated at 15 Hz to 25,000 Hz with 60 ohm impedance and 101 dB SPL per milliwatt.