AKG K 451

Portable on-ear headphones with in-line microphone and remote for iPhone®

  • AKG K 451


  • AKG K 451

    Alternate view with in-line remote/microphone

  • AKG K 451

    Closeup detail of earcup

  • AKG K 451

    Convenient folding design for easier storage and transport

  • AKG K 451

    Product box

  • AKG K 451

    Product box

  • AKG K 451

    Top view of folding earcup design

Item #: 039K451

Review Summary

This item is no longer available to purchase.
Contact us for other options
Call   Email  

Our take on the AKG K 451

by Dave Bar

Travel in style with these compact, high-quality headphones

folding design

A compact, folding design makes the K 451s easy to take along everywhere.

Take AKG's compact K 451 portable headphones with you everywhere to enjoy your music to the fullest, and manage your phone calls with hands-free ease. They deliver the top-to-bottom clarity and accuracy that music lovers demand. Soft, comfortable ear pads team up with the K451's closed-back, lightweight design to block out most ambient noise for undistracted listening. An innovative folding mechanism allows these 'phones to collapse down to a super-compact size for easy carrying inside the included protective case.

in-line mic

The in-line microphone and remote let you easily answer calls on your iPhone and adjust the volume.

Switch between calls and music on your iPhone®

iPhone users get extra-convenient operation. An in-line microphone and remote let you make and receive calls, as well as control basic music playback without even touching your phone. And these headphones are compatible with your iPod® or iPad®, too. Plus, AKG includes two detachable cords — one with the in-line remote/microphone, and a standard headphone cable. Each is designed to be tangle-resistant for fewer hassles on the go.

See more info on this item


  • lightweight, on-ear earcups with padded headband
  • compact, portable design with 3D-Axis2 folding mechanism for easy storage and portability
  • closed-back earcup design helps attenuate outside noise
  • in-line microphone and remote control for iPhone® iPod®, and iPad®
  • frequency range: 11-29,500 Hz
  • impedance: 32 ohms
  • 50" detachable single-sided headphone cord with in-line remote/mic and stereo mini plug
  • 51" detachable standard headphone cord with stereo mini plug
  • carrying case included
  • weight: 4.2 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
Earcup Type
Frequency Response
11-29.5k Hz
126 dB
32 Ohms
4.2 ounces
Cord Length
Airline Adapter Included
iPod Control
Volume Control
Built-in Microphone
Parts Warranty
2 Years
Labor Warranty
2 Years
Product Research
What's in the box?

Download owner's manual

  • On-ear headphones
  • 50" Headphone cable with in-line remote/mic (terminated by a male 2.5mm connector on one end and a male 3.5mm connector on other end)
  • 51" Headphone cable (terminated by a male 2.5mm connector on one end and a male 3.5mm connector on other end)
  • 1/4" adapter
  • Carrying case
  • In-Line Remote Control Diagram
  • "Attention!" booklet
  • Warranty Card

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-Back Design: The K451 on-ear headphones feature a closed-back design that naturally attenuates ambient noise for a more relaxed listening experience.

Comfortable Fit: The AKG on-ear headphones feature a lightweight design, leatherette padded ear-cups, and adjustable headband to provide a comfortable fit.

3-Button Remote Control + Mic: The AKG K451 features a 3-button remote & microphone (on headphone cable) so you can use your iPod, iPhone, or iPad on the go with in-line controls. The integrated remote lets you initiate play/pause, change tracks, adjust volume, or take a call (iPhone only) without ever touching your player. The built-in microphone supports both voice control (for iPod/iPhone/iPad) and hands-free communication (iPhone only). The K451 is "Made for iPod/iPhone/iPad" compatible and supports the following models and functions (as of 8/15/2012).

iPod Model Generation Tested Version Audio Output Integrated Remote Built-in Mic
3.5mm Connector Audio Playback Playback Controls Answer/End Call Voice Control Hands-Free Communication
Shuffle 1st n/a Y Y N N N N
2nd n/a Y Y N N N N
3rd n/a Y Y Y N N N
4th n/a Y Y Y N N N
dock connector 3rd 2.0.2 Y Y N N N N
4th 3.1.1 Y Y N N N N
mini 1st 1.4.1 Y Y N N N N
2nd 1.4.1 Y Y N N N N
video 5th 1.3 Y Y N N N N
classic 80GB 1.1.2 Y Y N N N N
120GB 2.0.1 Y Y Y N Y N
160GB 2.0.4 Y Y Y N Y N
nano 1st 1.3.1 Y Y N N N N
2nd 1.1.3 Y Y N N N N
3rd 1.1.3 Y Y N N N N
4th 1.0.4 Y Y Y N Y N
5th 1.0.2 Y Y Y N Y N
6th 1.1 PC Y Y Y N Y N
touch 1st 2.2.1 Y Y N N N N
2nd 4.2.1 Y Y Y N Y N
3rd 5.1.1 Y Y Y N Y N
4th 5.1.1 Y Y Y N Y N
iPhone 2G 3.1.3 Y Y N N N N
3G 4.2.1 Y Y N N N N
3GS 4.3.5 Y Y Y Y Y Y
4 5.1.1 Y Y Y Y Y Y
4S 5.1.1 Y Y Y Y Y Y
iPhone 1 5.1.1 Y Y Y N Y N
2 5.1.1 Y Y Y N Y N

Note: Apple iPod/iPhone software updates may change functionality results. If you download a newer software version, you may need to reset your iPod/iPhone to regain functionality. If this doesn't work, you may need to wait until a newer software update is available.

Headphone Cable: The AKG K451 utilizes a detachable single-sided 99.99% oxygen-free cable (OFC) terminated by a gold-plated 3.5mm connector for maximum signal transfer and sound quality. A 1/4" adapter is also included.

3D-Axis Folding Design: The AKG on-ear headphones feature a unique 3D-Axis folding mechanism for ease of handling, storing, and transporting.

Storage Case: The K451 on-ear headphones comes supplied with a carrying case that features polyester construction and a zippered closure to protect the headphones during transport or storage.


Product reviews from the Crutchfield Labs (what are the Labs?)

Quick impressions from the Lab

Comment by Ralph Graves Staff Writer - Creative,

Clean sound for clean fun!

Written by Ralph Graves, Staff Writer - Creative, on 2/13/2012 10:12:00 AM

The AKG K 451 headphones are indeed compact and portable. The earcups, though small, comfortably covered my ears and closed them off from a good deal of the noise around me. I was impressed by how clean my music sounded coming from the headphones.

Since these are portables, I spent most of my time with them listening to lo-res audio files. They sounded pretty good, and I heard a reasonable amount of detail. With higher-quality audio tracks, the sound was (naturally) even better. They may be designed for portable use, but I could definitely use the AKG K 451's for day-to-day listening at work, too.

Review this product
Great Gear Giveaway rewards card

Submit a review and then enter to win a $500 rewards card

AKG K 451 Reviews

Average Customer Review:

3 people say:

Review this product:

Thanks for taking the time to share your experiences about this product. Please be sure to focus your comments on the product itself. Read our Review Guidelines for more information.

Your email won't be visible. Please use the email address that is associated with your order.
(e.g., JohnD) Your review will be signed using the display name and location
(e.g., Charlottesville, VA)

Click on a star to rate the overall product on a scale of 1-5
Rate the following specific attributes
  Sound Quality
 "Coolness Factor"
 Build Quality
 Noise Reduction
1500 characters left
Attach a YouTube Review
Crutchfield Video Review Guidelines
  • Only submit videos that you made or are authorized to use.
  • Do not submit videos that contain music, video or visuals that are copyrighted and belong to someone else.
  • Please see our Review Guidelines for more information.
500 characters left
500 characters left
Filter by rating:
4 out of 5

not worth the inline controls

Written By apm_philly, Philadelphia on Saturday, December 15, 2012
I purchased the ak451s because they advertised high audio quality and an inline mic and remote. however, the audio quality while using the supplied in line mic cord was HORRIBLE! I was glad they supplied a regular cord too witch made the sound bearable. Build quality low=very plastic feeling but you get what you pay for there.
cheap for the audio quality once you get rid of inline mic cord. Also cube filling sound when the office is empty on a saturday and full volume on my phone.
NOT WORTH THE INLINE MIC!! Go with the graedos (maybe) didn't test them
Was this review helpful?    Yes | No
"Coolness Factor"
Build Quality
Noise Reduction
Sound Quality
4 out of 5

Great sound but limited sizing

Written By DallasListener, Dallas, TX on Tuesday, October 16, 2012
Crutchfield Customer Review (What's this?)
Sound is wonderful, but the headband does not extend far enough to allow the cups to fit squarely over my ears in daily use. Like most on-ear designs, a good fit is essential both for isolation and for sound quality. So I had to return these because my head seemed a little too big. I'm surprised and very disappointed.
1 out of 1 people found this helpful
Was this review helpful?    Yes | No
"Coolness Factor"
Build Quality
Noise Reduction
Sound Quality
5 out of 5


Written By BBS, Raleigh NC on Tuesday, September 25, 2012
Crutchfield Customer Review (What's this?)
These headphones are simply exceptional. I compare the sound output of any audio equipment to the range and detail of my reference quality equipment, and was blown away by the performance of these headphones, particularly given their size and portable application. Sound is a personal preference, but these are worth a try - you too may be pleasantly surprised, both by the great sound quality and the reasonable price.
Balanced Sound Warm output with clear and deep bass Excellent high level detail Broad music range (even with poor portable amplification) Good build quality
Size of the band may not fit very big heads
1 out of 1 people found this helpful
Was this review helpful?    Yes | No
"Coolness Factor"
Build Quality
Noise Reduction
Sound Quality

Add accessories for the AKG K 451

Get better sound from your headphones with a dedicated headphone amp. See all categories & accessories

Pro-Ject Head Box S Headphone amplifier (Black)
9 people say
Your Price: $159.99
Add to Cart
HiFiMAN EF5 Vacuum tube headphone amplifier
1 person says
Your Price: $499.99
Add to Cart
HiFiMAN EF-6 Headphone amplifier
Your Price: $1,599.99
Add to Cart
Audioengine D1 Digital-to-analog converter/headphone amplifier
60 people say
Your Price: $169.99
Add to Cart
Arcam rPac USB digital-to-analog converter/headphone amplifier
3 people say
Your Price: $249.99
Add to Cart
Cambridge Audio DacMagic Plus Stereo digital-to-analog converter/headphone amp/preamp (Black)
16 people say
Your Price: $499.99

After $100.00 Savings

Add to Cart
Audioengine D3 Plug-in USB digital-to-analog converter/headphone amplifier
3 people say
Your Price: $149.99

After $40.00 Savings

Add to Cart

Why choose SquareTrade?

The #1-Rated Protection Plan

Thousands of people have reviewed SquareTrade Protection Plans — and made us #1.

5-Day Service Guarantee & Free Shipping

We'll repair or replace your item in five business days or less after we've received it, or your plan is free. And, as always, we pay for all shipping.

Protection from Normal, Everyday Use

Repairing your average mechanical or electrical failure can cost as much as buying a new device. With SquareTrade, you're covered — including parts and labor.

Protection from Drops, Spills & You

Drop it? Spill on it? Run over it? No worries. We cover accidents caused by you and people you know.

2 Year Protection Plan
2 Year Protection Plan with Drops & Spills coverage
Your Price: $23.99
Add to Cart
3 Year Protection Plan
3 Year Protection Plan with Drops & Spills coverage
Your Price: $29.99
Add to Cart

For a more in-depth review and enhanced detailed information on the AKG K 451, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_039K451/AKG-K-451.html ).