AKG K821 Superior Reference Open Back Headphones

AKG K821 Superior Reference Open Back Headphones



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AKG's new headphone flagship provides superior quality like never before. Boasting an incredibly pure and natural sound, the K812's are designed specifically for the music professional.

Superior Quality

Designed for immense clarity, you can expect to hear every minute detail reproduced in high, sonically-rich, fidelity. The immaculately balanced sound produced by the K821's is perfect for production, mixing and mastering - ensuring that all music professionals can benefit from it's amazingly pure and natural sound. Extending beyond the human range of hearing, you'll hear every single distortion-free nuance.

AKG K821 Superior Reference Open Back Headphones Features:

  • Flagship Headphones produce the most accurate, pure & natural sound
  • Large 53mm Transducer provides best-in-class headroom and dynamic range
  • Super-Strong 1.5 Tesla Magnet System provides power and precision
  • Superior Frequency Response ranging from 5Hz to 54kHz
  • Incredibly Comfortable with open-mesh headband and slow-retention pads

Size Matters

Fitted with the largest transducer AKG has ever designed, the 53mm transducer was developed from scratch by AKG to ensure the best-in-class dynamic range and headroom - pushing the boundaries in pursuit of sonic perfection.

Magnetic Magic

Such an pure and natural sound could only be achieved through use of truly high-end components. The 1.5 Tesla Magnet is no exception to this - the strongest magnet system available on the market - lends its incredible power and precision to these reference-grade headphones, resulting in an extremely accurate sonic image.

Built To Last

Built for both luxurious comfort and long-term durability in equal measure, the K812's are more than eqipped to handle daily extensive use. Built using the highest-quality components, the luxury is extended to the construction materials of the K812's.

Ergonomically designed to go-the-distance, these high-end headphones feature an open-mesh headband for maximum air circulation and minimum surface pressure and a pair of slow-retention ear pads to provide the most comfortable and compatible fit, ensuring consitent comfort over long durations.

What's Included:

  • 1 x K812 Professional Headphones
  • 1 x Premium Headphone Stand
  • 1 x 3m Cable

AKG K821 Superior Reference Open Back Headphones Specifications:


  • Driver size (mm): 53
  • Sensitivity (dB SPL/V @ 1 kHz): 110
  • Rated impedance (O): 36
  • Audio frequency bandwidth (Hz): 5 - 54000
  • Maximum input power (mW): 300
  • Cable(s) length (m): 3

Audio Specifications

  • Maximum input power: 300 mW
  • Audio frequency bandwidth: 5 - 54000 Hz


  • Weight (oz): 13.8
  • Weight (g): 390

Audio Interface

  • Type: Stereo plug – 3.5mm (1/8-inch) with 6.3 mm (1/4”) screw-on adapter
  • Gender: Male
  • Contacts: 3-pin
  • Interface finish: Gold


  • Detachable: Yes

Wearing Style

  • Over-ear: Yes


  • Studio Mixing: Yes
  • Hi-Fi Listening: Yes
  • Mobile Devices: Yes


  • Not foldable: Yes

Cup Style

  • Open: Yes


  • Foldable: No
  • Replaceable Earpads: Yes
  • Open: Yes
  • Over-ear: Yes
  • Detachable cable: Yes
More Information
Manufacturer AKG
SKU 116865
Shipping Weight (kg) 2.000000
MPN K812
Warranty 2 years
Cup Type open


We know you want to get your gear as quickly and as safely as possible, Next Working Day Delivery to UK Mainland Addresses, on all IN STOCK items, if ordered before 3pm. This will include a text or email on the day of delivery giving you an exact hour window of when your gear will be with you.

Orders under £99: £4.99 Delivery Charge


Orders over £99: Free Next Day DPD Delivery (When Ordered before 3pm)


Weekend Delivery (Saturday-Sunday): £9.99 (When Ordered before 3pm Friday)


Heavy Items (over 40kg): £39.99 Pallet Service







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If you have bought something In-Store or Online and want to return it as unwanted, you have 30 days from when you receive the goods to contact our PMT experts either by phone or email to return your item.

We can offer you a refund if you return your item within 30 Days from purchase date and with 100% perfect packaging. 


Please Note - We cannot accept unwanted returns on microphones, any in-ear earphones or monitors, and any other items that touch your mouth, nose or inner ear if you have removed the hygienic packaging.