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Black lightweight on-ear headphones with folding headband and 3.5 mm plug

Koss

Koss KPH25K on-ear headphones, 32 ohms, 80–20000 Hz, 94 dB, 4 ft cord, 3.5 mm plug

SKU CH-81NP-305CM MPN KPH25K

Lightweight on-ear headphones with a folding frame, 32 ohm impedance, 80–20000 Hz response, 94 dB sensitivity, and a 4 ft cord ending in a 3.5 mm plug

  • TypeHeadphone
  • Input Impedance32 ohms
  • ConnectorMini-phone
  • Ear CouplingOver-the-head
  • Cord Length4 ft
  • Ultra-light frame keeps you comfortable on long journeys
  • Folds flat into a compact shape for easy packing
  • Dynamic drivers deliver 80–20000 Hz frequency response
  • 94 dB sensitivity provides clear volume from portable devices
  • 4 ft cord with 3.5 mm plug connects straight to your player

Ultra-light on-ear headphones for travel

The Koss KPH25K is a new pair of on-ear headphones built for listeners who want minimal weight while moving. The over-the-head band folds flat so the set slips into a bag or pocket without adding bulk. Dynamic elements drive an 80–20000 Hz response at 94 dB SPL for clear everyday audio.

3.5 mm plug with in-line volume

A straight, single-entry 4 ft cord ends in a 3.5 mm mini-phone connector that fits phones, laptops and portable players directly. The in-line control lets you adjust level without reaching for the source device. No adapter or wireless pairing is required.

32 ohm load suits portable gear

The 32 ohm impedance draws little power, so battery-operated devices drive the KPH25K to comfortable volume without strain. Bass extension stops at 80 Hz, so listeners who want deep sub-bass impact will find the low end limited. The folding hinge is the only moving part; rough handling can stress it over time.

Highlights

  • Ultra-light frame keeps you comfortable on long journeys
  • Folds flat into a compact shape for easy packing
  • Dynamic drivers deliver 80–20000 Hz frequency response
  • 94 dB sensitivity provides clear volume from portable devices
  • 4 ft cord with 3.5 mm plug connects straight to your player

Specifications

BrandKOSS
ModelKPH25
TypeHeadphone
Input Impedance32 ohms
ConnectorMini-phone
Ear CouplingOver-the-head
Cord Length4 ft
Shipping weight3.62 kg
Package size254 × 76 × 25 mm

Questions about this item

What does the 94 dB sensitivity mean for everyday listening?

At 94 dB SPL the KPH25K reaches comfortable volume levels from phones, laptops or portable players without needing a separate amplifier.

What does the 3.5 mm mini-phone plug connect to and what limits it?

The 3.5 mm plug fits standard headphone jacks on phones, tablets and computers; audio quality is limited by the source device’s built-in DAC and output stage.

How does the folding over-the-head design affect fit and storage?

The headband folds flat so the headphones slip into a bag or pocket, while the over-the-head style keeps the 32 ohm drivers seated on-ear during movement.

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