Наушники — Koss KTXPRO1

The KTXPRO1 is an on-ear Koss headphone on a cable, with an open foam design and a retro look which Koss links to the portable technology of the 1990s. It sits among the lower-priced models in the current Koss range, with a list price of USD 24.99, and Koss offers it in three colourways - Black, Silver and a translucent version called Clear CLPRO. Like every wired model in the catalogue, the Koss Limited Lifetime Warranty applies to it.

Key specs that matter

Koss fits each earpiece with a titanium-coated dynamic driver whose impedance is 60 ohms. Koss quotes a frequency response of 15 Hz to 25,000 Hz and a sound pressure level of 103 dB SPL for 1 mW of input, with distortion given as below 0.2 percent. A 1.2 m straight lead with dual entry is fitted, and it ends in a standard 3.5 mm jack. A volume slider is built into the cord, so level can be changed without reaching for the playback device.

Engineering and use context

The headband adjusts in length and is paired with a soft, flexible head sling that rests on the crown of the head, and the ear cushions are made of plush foam. Because the earpieces use an open foam construction, outside sound is not blocked, and the headphone does not isolate the listener from surroundings the way a closed design would. The dual-entry cable runs to both earpieces, and it is fixed rather than detachable, so a replacement lead cannot simply be plugged in. The on-ear format and the head sling are aimed at portable use with phones, laptops and personal players. The Clear CLPRO version also has a separate catalogue entry at the same USD 24.99 as the black and silver models, and Koss specifies the model purely as a passive wired headphone, with no microphone, battery or wireless module listed among its features.

Pairing

With its high sensitivity the KTXPRO1 is among the more sensitive models in the Koss range, so the analogue output of a phone, tablet, laptop or personal player is able to drive it without a separate headphone amplifier. Where a device has no analogue jack, a USB-C or Lightning dongle with a headphone socket bridges the gap, and a 6.3 mm adapter lets the jack fit a full-size headphone socket on a hi-fi amplifier or receiver. The in-line slider also gives a way to trim level on sources that have coarse volume steps.

Alternatives

The Koss KPH30i is another open-air on-ear model rated at 101 dB SPL, with an in-line microphone and remote, at USD 29.99.