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Koss PRO / 4S

Headphones - Professional, closed, folding, 10-25000Hz, 99dB, 35 Ohm, removable cable 1.4m, jack 3.5mm
The product is localised for GB
Price incl. VAT £187.90
Price excl. VAT £156.58
Extended warranty + 1 year £18.79 Extended warranty + 1 year
In stock 1 pcs
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Warranty 24 months Code:  JK803e Extended Warrant +75 months Product Number:  PRO4SB
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Koss PRO / 4S £187.90 In stock 1 pcs

Koss PRO / 4S

The Koss Pro/4S is a professional headphone designed specifically for users who need music and headphones every day. Thanks to the brand new SLX40 reference element, they deliver unbelievably accurate, and undistorted sound, making these headphones the perfect choice for studio use. The Koss Pro/4S Studio Headphones come with a 1.4m cable, a 6.3mm adapter, and a travel case that protects your headphones while you're on the go.

Key features

  • Designed for studio use
  • D-profile and memory foam earphones
  • Koss SLX40 Elements
  • Removable cable with dual input
  • Fold for better portability
  • Protective case

Performance for everyday listening

These headphones are made with a view to everyday use. The shells are made of aluminum and the memory foam ear pads are packed in comfortable leather. The new integrated headphone metal structure makes Pro/4S an extremely robust headphone set in areas where other headphones often fail.

The Koss Pro/4S has a removable cable (3.5mm jack) that can be attached to both left and right shells for optimal fit. The free connector becomes an output that you can use to connect other headphones, and one sound source can serve several more listeners.

Unique design

Last but not least, it is necessary to mention the special D-profile of the ear, that copies the ear shape. It sounds like a marketing pull, but the "D" shape provides much more comfort than the classic circular shape. Thanks to this design, the headphones fit almost everybody perfectly. Combined with a padded headband, maximum comfort is achieved, when wearing it for long periods of time. Enjoy the full size of these headphones as they will not reach the size of the standard headphones.

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Without microphone
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connection type
3.5 mm Jack
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Cable length
1.4 m
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Cable routing
Unilateral (in one shell)
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Headphone characteristics
Functions and Features
Headphone earcups, A detachable cable
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Frequency out
10 Hz
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Frequency in
25,000 Hz
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99 dB/mW
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35 Ohm
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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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