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KEF M400 On-Ear Headphones

MSRP 249.00
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The KEF M400’s are high fidelity on-ear headphones that deliver a powerful, high resolution sound with a fine attention to detail. They feature 40mm neodymium drivers, and a copper-clad aluminum wire with a specially designed coil, voiced to deliver crisp, clear highs, wide mid-range capabilities, and a deep bass response.

The M400’s feature a comfortable, lightweight precision-machined cast aluminum frame with a compact, folding design. Designed for extended listening sessions, they include memory foam, high density earpads made of soft leather. The earpads provide an acoustic seal to block out any excess noise or signal loss. An easy to use, detachable cable allows the listener to navigate their devices and take/ end phone calls.


  • 40mm neodymium drivers
  • Precision-machined aluminum frame
  • 20 Hz to 20 kHz frequency response
  • Detachable cable

In the box

  • KEF M400 Hi-Fi On-Ear Headphones
  • Detachable cable
  • Carrying pouch
  • Flight adapter
  • Warranty info
Maximum Input Power: 30 mW
Driver: 1.6" / 40.0 mm
Impedance: 32 ±15% ohms
Sensitivity: 101.5 dB ±4 dB (IEC-318 at 1 KHz)
Weight: 6.2 oz / 175.0 g
Frequency Response: 20 Hz to 20 kHz
Connector: 1/8" / 3.5 mm
Noise Attenuation: -20 dB
Cable Length: 4.3' / 1.3 m
MSRP $249.00