If you never thought you could find true happiness in a portable headphone, you probably haven't heard the Sennheiser/adidas HD 25-1 II Originals. These rugged, lightweight cans deliver the powerful, deep bass and crystal-clear sound you need to really savor your tunes — whether it's on a home hi-fi system, with your portable player, or in a recording studio.

The HD 25's softly padded, sealed-back earcups reduce outside noise to a distant memory, with no extra electronics or batteries needed. And the left earcup even rotates to allow single-ear listening — great for DJs. Extremely robust construction means they'll hold up under heavy use. Plus a unique, split headband design adjusts two separate ways to ensure a highly secure and comfortable fit. To top it off, adidas gave the Originals cool blue accents for a stylish look.

Product Highlights:

  • sealed, on-the-ear design
  • adjustable split headband for added comfort and a more secure fit
  • softly padded, closed-back earcups reduce ambient noise levels without the need for extra electronics or batteries
  • rotatable earcup for single-ear listening
  • extra-rugged construction and powerful performance for DJ or studio use
  • angled headphone minijack with threaded full-size adapter
  • detachable single-sided cable for reduced tangles
  • cable length: 57 inches
  • frequency response: 16-22,000 Hz
  • impedance: 70 ohms
  • sound pressure level (SPL): 120 dB
  • total harmonic distortion: less than 0.3%
  • nylon carry pouch and addition white velour earpads included
  • weight: 5.7 oz.
  • warranty: 2 years
  • Our 60-day money-back guarantee
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Hands-on research

What's in the box?

Download owner's manual

  • On-ear headphones (with attached 57" cord terminated by a 3.5mm connector)
  • 3.5mm to 1/4" adapter
  • Additional pair of earpads (white velour)
  • Draw string bag

Features and Specs

Fit Style On-ear
Earcup Type Closed
Noise-canceling No
Bluetooth No
Frequency Response 16-22k Hz
Sensitivity 120 dB
Impedance 70 Ohms
Weight 5.7 ounces
Cord Length 57"
Airline Adapter Included No
iPod Control No
Volume Control No
Built-in Microphone No
Parts Warranty 2 Years
Labor Warranty 2 Years

Product Research


Closed On-Ear Design: The Sennheiser HD 25-1-ii's closed earcups are designed to block outside noise, useful in a DJ's environment.

Comfort Fit: The headphones offer a comfortable fit with soft-padded on-ear earpads and adjustable, padded headband.

Rotating Earcup: The right earcup rotates almost 90° forward or backward, useful when you need to hear someone in the room.

Split Headband: The split headband allows you to adjust the clamp force on your ears; increase for added noise isolation, decrease if needed for comfort.

Neodymium Magnets: The Sennheiser HD 25-1-ii headphones utilize powerful neodymium magnets for stereo sound with outstanding bass performance.

Cord: The HD 25-1-ii headphones have a single-sided 57" straight cord terminated by a right angle male 3.5mm connector. A 3.5mm to 1/4" adapter is included.

Carrying Pouch: The HD 25-1-iis come with a carrying pouch for convenient handling and storage.

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