Наушники — Koss UR20

The Koss UR20 is a closed-back, full-size wired headphone from the Milwaukee company, positioned by Koss for professional DJs as well as for recording sessions and everyday listening at home. Koss lists it at USD 24.99, sells it in black only and presents it as suitable for music enthusiasts at any level, while the product listing names it the UR-20 Home headphone under part number T55959. The Koss Limited Lifetime Warranty covers the UR20, as it does across the wired stereophone catalogue of the brand.

Key specs that matter

Koss publishes a frequency response of 30 to 20,000 Hz, an impedance of 32 ohms and a sensitivity of 97 dB SPL at 1 mW. Koss puts total distortion under 0.3 percent. Its lead is straight and enters on one side only, 2.4 m long, terminating in a 3.5 mm jack with gold plating. Koss states a weight of about 284 g, a figure that includes a good part of the cable rather than the headphone alone.

Engineering and use context

Each earcup carries a dynamic element built around a 16-micron mylar diaphragm driven by a neodymium rare earth magnet. The cups are closed, and leatherette ear cushions surround the ear to seal it, which is how Koss achieves the noise isolation it lists among the main features. The earpiece measures about 11 cm across, with an oval opening of roughly 7 by 5.5 cm for the ear. Koss lists the noise isolating design and a lightweight build among the model's features, describes the construction as lightweight and built for maximum durability, and the headband follows the simple sling pattern the company has used on its entry-level full-size models. The single-entry cord runs into one earcup only, leaving the other side free of wiring, and its length suits a desk, a mixer position or a home hi-fi system where the listener sits some distance from the source.

Pairing

Being an easy load, the UR20 is designed to be driven directly by phones, laptops, portable players, DJ mixers and the headphone jack of an integrated amplifier, so no separate headphone amplifier is part of the intended setup. Because the plug is the small type, an adapter is needed for studio gear and older hi-fi components with a 6.3 mm socket.

Alternatives

The Koss UR29 is a collapsible closed-back over-ear sibling rated at 100 ohms and 101 dB SPL with a response reaching down to 18 Hz.