Sennheiser/adidas® HD 25-1 II Originals

Stereo headphones

  • Sennheiser/adidas® HD 25-1 II Originals


  • Sennheiser/adidas® HD 25-1 II Originals

    Product package and storage bag

  • Sennheiser/adidas® HD 25-1 II Originals

    Side view

  • Sennheiser/adidas® HD 25-1 II Originals

    Striped adidas accents

Item #: 143HD25
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Our take on the Sennheiser/adidas® HD 25-1 II Originals

by Dave Bar

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.

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  • 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

Hands-on research from the Crutchfield Labs (what are the Labs?)

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
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

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.


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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For a more in-depth review and enhanced detailed information on the Sennheiser/adidas® HD 25-1 II Originals, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_143HD25/Sennheiser-adidas-HD-25-1-II-Originals.html ).