More than your average on-ear headphones, M400 deliver sound you can almost feel. KEF’s state-of-the-art driver technology is housed in a seductively sleek design engineered for total comfort.
Design by Studio F. A. Porsche. Sound by KEF
at a glance
20Hz-20kHz
2.5/3.5mm
101.5dB±4dB
SOUND
Great sound to go
The beauty of M400 is more than skin deep. With KEF’s ultra-light 40mm neodymium driver and copper clad aluminium wire (CCAW) voice coil, M400 reveals all the glories of the original performance: crisp, intricately detailed highs, seamlessly fluid midrange and tight, clean bass. Music you can feel – and so realistic, you can almost touch it. Your favourite tracks never sounded so good.
The beauty of M400 is more than skin deep. With KEF’s ultra-light 40mm neodymium driver and copper clad aluminium wire (CCAW) voice coil, M400 reveals all the glories of the original performance: crisp, intricately detailed highs, seamlessly fluid midrange and tight, clean bass. Music you can feel – and so realistic, you can almost touch it. Your favourite tracks never sounded so good.
"With a plethora of advanced acoustic features and a sleek, robust design, the KEF M400 headphones bring high-resolution sound to today's mobile, connected consumers."
RED DOT AWARD 2016 WINNER
"The distinctive profile of the KEF M400 combines state-of-the-art acoustic technologies with precision engineering, robust lightweight design and exceptional wearing comfort."
iF PRODUCT DESIGN AWARD 2016
"With a plethora of advanced acoustic features and a sleek, robust design, the KEF M400 headphones bring high-resolution sound to today's mobile, connected consumers."
RED DOT AWARD 2016 WINNER
"The distinctive profile of the KEF M400 combines state-of-the-art acoustic technologies with precision engineering, robust lightweight design and exceptional wearing comfort."
iF PRODUCT DESIGN AWARD 2016
"With a plethora of advanced acoustic features and a sleek, robust design, the KEF M400 headphones bring high-resolution sound to today's mobile, connected consumers."
RED DOT AWARD 2016 WINNER
"The distinctive profile of the KEF M400 combines state-of-the-art acoustic technologies with precision engineering, robust lightweight design and exceptional wearing comfort."
iF PRODUCT DESIGN AWARD 2016
CONNECTIVITY
Built to last
Lightweight, compact and built to withstand years of use on the move as well as at home, M400 has all the makings of a true design classic. The invisibly hinged folding frame is engineered from precision-machined cast aluminium, with supremely comfortable supra-aural earpads and a leather-covered headband contrasting with four silky premium finishes: Racing Blue, Sunset Orange, Deep Black or Champagne White.
Lightweight, compact and built to withstand years of use on the move as well as at home, M400 has all the makings of a true design classic. The invisibly hinged folding frame is engineered from precision-machined cast aluminium, with supremely comfortable supra-aural earpads and a leather-covered headband contrasting with four silky premium finishes: Racing Blue, Sunset Orange, Deep Black or Champagne White.
DESIGN STORY
Music on, world off
Padded with high-density memory foam covered in soft, sweat-resistant protein leather, the ball-jointed ‘race-track’ ear pads fit the exact shape of your ear and form an effective seal that cuts out external noise while preventing sound leakage. The light and sturdy aluminium frame exerts the right amount of gentle pressure that allows you to enjoy your music in comfort for as long as you want.
Padded with high-density memory foam covered in soft, sweat-resistant protein leather, the ball-jointed ‘race-track’ ear pads fit the exact shape of your ear and form an effective seal that cuts out external noise while preventing sound leakage. The light and sturdy aluminium frame exerts the right amount of gentle pressure that allows you to enjoy your music in comfort for as long as you want.
TECH TALK
The nitty-gritty
Specifications
driver (headphone)
40mm
weight
175g
frequency response
20-20kHz
sensitivity
101.5 dB±4dB (IEC-318 at 1KHz)
impedance
32±15%Ohm
maximum input power
30mW
noise attenuation
-20dB
connector
3.5/3.5mm
KEF reserves the right, in line with continuing research and development, to amend or change specifications. E&OE.
Awards & Reviews
top pick - sound & vision
"... played nice and loud, totally rocked my world... the M400 projected a huge soundstage around my head, and the music's ominous low rumble was viscerally felt. The M400 sounds refined and clear, with bass that is definitely goosed up just a tad… but it's done tastefully." — 2016
reddot award 2016 winner
"With a plethora of advanced acoustic features and a sleek, robust design, the KEF M400 headphones bring high-resolution sound to today's mobile, connected consumers." — 2016
iF product design award 2016
"The distinctive profile of the KEF M400 combines state-of-the-art acoustic technologies with precision engineering, robust lightweight design and exceptional wearing comfort." — 2016
metro newspaper
"Like Hush Puppies for your ears - the M400s are lighter, brighter and built for the commute." — 2015
Specifications
driver (headphone)
40mm
weight
175g
frequency response
20-20kHz
sensitivity
101.5 dB±4dB (IEC-318 at 1KHz)
impedance
32±15%Ohm
maximum input power
30mW
noise attenuation
-20dB
connector
3.5/3.5mm
KEF reserves the right, in line with continuing research and development, to amend or change specifications. E&OE.
Awards & Reviews
top pick - sound & vision
"... played nice and loud, totally rocked my world... the M400 projected a huge soundstage around my head, and the music's ominous low rumble was viscerally felt. The M400 sounds refined and clear, with bass that is definitely goosed up just a tad… but it's done tastefully." — 2016
reddot award 2016 winner
"With a plethora of advanced acoustic features and a sleek, robust design, the KEF M400 headphones bring high-resolution sound to today's mobile, connected consumers." — 2016
iF product design award 2016
"The distinctive profile of the KEF M400 combines state-of-the-art acoustic technologies with precision engineering, robust lightweight design and exceptional wearing comfort." — 2016
metro newspaper
"Like Hush Puppies for your ears - the M400s are lighter, brighter and built for the commute." — 2015
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