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Koss BT / 540i black (24 months warranty)

Koss BT / 540i black (24 months warranty) - Headphones
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Headphones - Wireless, NFC/Bluetooth enabled, built-in microphone, on-board controls, 10Hz-25kHz frequency response, 38 Ohm impedance, 100dB sensitivity, carrying case
The product is localised for GB
Code:  JK984 Product Number:  BT540I

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Koss BT / 540i black (24 months warranty) Discontinued
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Koss BT / 540i black (24 months warranty)

A Brand with a Unique Touch

In 1958, John C. Koss teamed up with engineer Martin Lange, Jr. to develop a portable stereo phonograph player with side-wing speakers. The pair demonstrated their new stereo record player at a Wisconsin audio show. One of the product's unique features was a privacy switch, which allowed listeners to hear music by plugging in the world's first SP/3 Stereophone. The stereophones were intended to be an accessory to demonstrate the high-fidelity stereo sound that the portable phonograph player delivered.

High-quality Headphones for Unobtrusive Listening

Featuring state of the art Bluetooth hardware and software integrated with aptX codec technology, the Koss BT540i is the most advanced Bluetooth headphone designed and engineered by the wireless headphone pioneer, Koss Corporation.

Listeners can stay connected using the built-in, dual microphones which work in sync to reduce background noise, producing exceptional call clarity. Easy to locate, on-board controls allow listeners to quickly navigate through songs, play or pause music, volume-up, volume-down, and answer incoming calls. 

The BT540i Wireless Bluetooth Headphones are outfitted with the all-new precision-tuned Koss PLX40 Dynamic Elements featuring crisp highs, robust mids and smooth lows, perfect for personal listening. Premium leather memory foam cushions close gaps around the ear, creating the perfect seal with an incredibly comfortable fit.

The built-in lithium-ion battery delivers more than 12 hours of listening time on a single charge. A detachable audio cable is included and can be used as a bypass should the battery run out. The BT540i folds flat and comes with a travel case for easy portability. Also included is a USB cable for on-the-go charging.

Packaging Includes:

  • Wireless Bluetooth headset with Li-Ion battery
  • USB power cable
  • 1.4m audio cable with 3.5mm jack
  • Travel case


ear Done!
Closed Done!
Without microphone Done!
Frequency from
10 Hz Done!
Frequency to
25 kHz Done!

Headphone type

ear Done!
Closed Done!
Without microphone Done!

Headphone characteristics

Frequency from
10 Hz Done!
Frequency to
25 kHz Done!
100 dB/mW Done!
Volume control Done!
38 Ohm Done!


connection type
3.5 mm Jack, NFC Done!
Cable length
1.4 m Done!
Cable routing
Unilateral (in one shell) Done!


Black Done!
More Specifications

Legendary producer headphones KOSS was founded by John C. Koss in 1953 in Milwaukee. Reputation the company built steadily throughout the second half of the twentieth century. In 1969 headphones appearing in Air Force One. In the era of the Beatles, the company scores points with its Koss Beatlephone. Milestone occurred in 1989. The company introduced perhaps the most popular headphones of all time - Koss Porta Pro, which is unchanged nowadays. At the time, the quality of the products the company already well known. Yet all surprised by an unprecedented step taken in 1989. Even then, the legendary society was so sure of exquisite quality of its products that all of its products launched in exchange for a negligible fee absolute lifetime warranty that lasts to this day.

At present, headphones KOSS considered the best on the market. The offer is wide enough so your favourite portfolio to find musicians, gamers, athletes, travelers, students and everyone who needs or wants the best.

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Specifications can be changed without notice. Images are for illustrative purposes only. Retail Price (MSRP) means the manufacturer's/supplier's suggested retail price.

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Accessories for Koss BT / 540i black (24 months warranty)
Chcete doručit zboží do Česka? Prohlédněte si Koss BT/540i černá (24 měsíců záruka). Chcete doručiť tovar na Slovensko? Prezrite si Koss BT/540i čierne (24 mesiacov záruka). For shipping to other EU countries visit this page Koss BT / 540i black (24 months warranty). Für Versand nach Deutschland, besuchen Sie bitte Koss BT / 540i schwarz (24 Monate Garantie). Für Versand nach Österreich, besuchen Sie bitte Koss BT / 540i schwarz (24 Monate Garantie). Magyarországra történő kiszállításért tekintse meg ezt a termékoldalt: Koss BT / 540i black (24 hónap garancia).

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