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AKG K551

Over-the-ear headphones (Black)

Item #: 039K551S

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AKG K551 headphones with in-line remote and microphone

The AKG K551 headphones with in-line remote and microphone are available in black or white with silver accents.

Crystal-clear sound doesn't have to stay at home

You want exquisitely detailed, well-balanced sound. You want long-lasting comfort. And you want it to go. AKG has just the recipe with its K551 reference-class headphones. A leader in headphone technology for more than 60 years, AKG designed the K551 to deliver clear, even sound for high-end performance that will please critical listeners as well as casual music lovers. The large 50mm drivers are housed in closed earcups, so all those musical intricacies stay sealed in, while external noise is kept to a minimum. That way, you can hear all the fine high-frequency detail that these transparent headphones deliver.

An iPhone®-friendly remote

The closed back design is not the only benefit for listeners who want to take these headphones out and about. AKG has equipped the 4-foot cable with an in-line remote for easy control of music playback and volume. Skip tracks, pause and play, or turn up the volume with the press of a button, while your iPhone or iPod® remains securely in your pocket or bag. The remote also features a built-in microphone for taking calls on your iPhone, with easy one-touch answer and hang-up capabilities.

The K551's soft ear cushions provide enough comfort to keep you listening for long periods, whether you're livening up your day at the office, or spending a quiet evening at home rediscovering your music collection. These headphones offer a great combination of comfort, durability, and sleek looks you'll enjoy wearing.

Product Highlights:

  • over-the-ear, closed-back design
  • large cushioned earcups and adjustable headband
  • large 50mm drivers for a realistic soundstage and powerful sound
  • 3-button in-line remote for music and volume control of iPhone®, iPod® and iPad®
  • built-in microphone for taking calls on iPhone
  • 2D-Axis fold-flat design for easier storage and transportation
  • 44" single-sided cord with miniplug
  • frequency response: 12-28,000 Hz
  • sensitivity: 114 dB
  • impedance: 32 ohms
  • weight: 10.76 oz.
  • warranty: 1 year
  • Our 60-day money-back guarantee
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Hands-on research

What's in the box?

Download owner's manual

  • Black over-ear headphones with attached 44" cord with in-line remote and microphone (3.5mm plug)
  • Attention! sheet
  • Warranty Card
  • Remote diagram
  • Environmental declaration

Features and Specs

Earcup Type Closed
Bluetooth No
Frequency Response 12-28k Hz
Sensitivity 32 dB
Impedance 114 Ohms
Weight 10.76 ounces
Cord Length 44"
Airline Adapter Included No
iPod Control Yes
Volume Control Yes
Built-in Microphone Yes
Parts Warranty 1 Year
Labor Warranty 1 Year

Product Research


Reference-class Headphones: The AKG K551 over-the-ear headphones combine the advantages of closed-back headphones (no sound leakage for a truly private experience) with the open sound of open-backs (typical speaker sound); making it ideal for both home and street use.

Real Image Engineering: Real Image Engineering is the scientifically defines the actual soundstage inside the space between your ears and the K551 headphones. The soundstage is large and accurate, with a realistic sense of width, distance, and depth.

50mm Driver: The 50mm (2'') driver, the biggest driver in the AKG headphone range, delivers a realistic soundstage far beyond what other headphones typically deliver.

Comfortable Fit: With large over-the-ear cups and a new, lightweight adjustable headband design, the K551 offers an amazing, comfortable fit allowing for hours of continuous listening.

Single-Sided Cable: The single-sided, 99.99% oxygen-free cable provides pure sound transmission. The headphone cable is terminated by a straight 3.5mm gold-plated connector.

In-line Remote/Microphone: The K551s features a 44" cord with an in-line remote control/microphone. The microphone is located close to your mouth, so your calls are clear and noise-free. The 3-button remote lets you control the playback functions (center button) and volume (outer buttons) from your iPhone, iPad, and iPod, plus Apple laptops and desktop computers.

2D-Axis Folding Design: The AKG K551 features a unique 2D-Axis folding mechanism for ease of handling, storing, and transporting.

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 verify what’s in the box, 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.

Product reviews from the Crutchfield Labs

Video: AKG 2013 Headphones
by Zak Billmeier

AKG brings more than 60 years of audio expertise to the table, and it shows in their 2013 line of headphones. Get the lowdown from the AKG booth at CES 2013.

What are the Labs?