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AKG K 550 (Factory Refurbished)

Around-the-ear headphones

11 Reviews

Item # 039K550Z

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Our take on the AKG K 550 (Factory Refurbished)

If the AKG K 550 headphones have piqued your interest but not yet spurred a purchase, the time is right to strike. AKG now offers a factory-refurbished version of these popular audiophile headphones. They're backed by AKG's one-year warranty, offering performance and peace of mind.

AKG quality more affordable than ever

If the AKG K 550 headphones have piqued your interest but not yet spurred a purchase, the time is right to strike. AKG now offers a factory-refurbished version of these popular audiophile headphones. They're backed by AKG's one-year warranty, offering performance and peace of mind.

Closed-back headphones with a wide-open sound

Most headphones with a sealed earcup design let you hear your music better in noisy environments, like at a club or in a busy office. But they can also bottle up the sound, making it feel as though it's coming from inside your head. Not the AKG K 550s. These advanced closed-back headphones deliver the spacious, realistic soundstage of an open-back design, while providing blissful relief from the outside world. And because they're sealed, you can enjoy truly private listening without sound leaking outside to those around you.

Large drivers for outstanding performance

AKG has been making high-quality headphones for music enthusiasts and professionals for over 60 years, and that experience really shows in the K 550s. They use big 50mm drivers, the largest in the AKG headphone lineup, to crank out powerful, crystal-clear sound from your hi-fi system or virtually any portable player. No matter what type of music you listen to, these 'phones will give you sparkling highs, engaging mids, and dynamic bass.

earcup closeup
cloeup earcup detail

Carefully designed inside and out

mini to full size adapter

The K 550 features a padded adjustable headband and ultra-soft around-the-ear earcups for a comfortable fit. The single-sided oxygen-free copper cable supports a clean signal from the source to your ears, and comes with a convertible headphone plug that works with both mini- and full-sized jacks. And its 2D-Axis earcup design folds flat for easier storage and transportation.

From our review of the AKG K 500 headphones

"The AKG K 550s are a good high-end headphone choice for less-than high-end listening situations. Although slightly warm, I felt I was getting all the musical detail my sound sources were delivering. And they were comfortable enough to wear all through the work day. And that's more than good enough for me!"

— Ralph, Crutchfield Blog and Product Review Editor

Great set of earphones. Comfortable with terrific sound. I purchased factory refurbs and I couldn"t be more pleased. Great product, great price. What is there to find fault with.


What's in the Box:

  • Refurbished over-the-ear headphones with attached 9' audio cable terminated by a male 3.5mm miniplug
  • Screw-on 3.5mm-to-1/4" Adapter
  • "Attention!" sheet regarding listening at high volume levels

Product Highlights:

  • around-the-ear, closed-back design
  • large cushioned earcups and adjustable headband
  • large 50mm drivers for a realistic soundstage and powerful sound
  • 2D-Axis fold-flat design for easier storage and transportation
  • frequency response: 12-28,000 Hz
  • impedance: 32 ohms
  • sensitivity: 114 dB
  • 9-foot single-sided cord with stereo mini plug
  • comes with full-sized 1/4" adapter
  • weight: 13.3 oz.
  • warranty: 1 year
  • Our 60-day money-back guarantee

AKG K 550 (Factory Refurbished) Reviews

Average Customer Review(s):

(11 Reviews)
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Features and Specs

Fit Style Over-the-ear
Earcup Type Closed
Earcup Width x Height 4.375" x 4.375"
Noise-canceling No
Bluetooth No
Mic For Taking Calls No
iPhone Control ---
Lightning Connector No
Android Control ---
Frequency Response 12-28k Hz
Sensitivity 114 dB
Impedance 32 Ohms
Weight 13.3 ounces
Cord Length 108"
1/4-inch Adapter Included Yes
Volume Control No
Parts Warranty 1 Year
Labor Warranty 1 Year

Product Research


Refurbished: The AKG K550-Z is a refurbished version of the K550 headphones. They do not come in the original packaging, but are packaged in a plain brown box.

Reference Series: The AKG K550-Z 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.

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 K550 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.

1/4" Adapter: The AKG over-the-ear headphones come with a 1/4" adapter to plug into your home stereo.

3D-Axis Folding Design: The AKG K550-Z features a unique 3D-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.

Staff Reviews

Product reviews from the Crutchfield Labs

Private listening and great sound meet in the AKG K 550 headphones

Written by Woody Sherman, A/V Writer, on 4/2/2012 5:02:00 PM

Ever since I started working at Crutchfield I've been on the lookout for headphones that met a certain profile.

a) I work in a quiet area, so they can't leak sound. Otherwise I'd inflict my eclectic musical preferences on my co-workers. b) They should be comfortable for long-term listening. And c) they should have an extended, flat frequency response, with a slightly warm tilt.

I don't know how much looking you've done for headphones. Apparently, what I was looking for is a rare item. Sealed headphones are not known for uncolored sound or fantastically even response. But the AKG K550's are an entirely different animal.

I became curious about these gems after reading several strongly favorable reviews online from some respected headphone reviewers whose blogs I read regularly. I snagged myself a pair and checked them out. I haven't had them off much since. It took me about 5 minutes of listening to realize I had to buy a pair.

One word of caution: getting the right seal is important with these headphones. That's not hard to do on my big noggin, but if your head has more demure dimensions than mine, you'll need to work with the nicely designed adjustments on the earcups to make sure that you're surrounding the ears with no gaps to the outside world. Then you'll hear all the remarkable bass, smooth midrange, and nice extended treble you've been looking for. Plus, you'll appreciate the luxurious comfort. I really like these headphones. I'm pretty sure you will too.

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