The MUON Story

MUON is a truly remarkable feat of sound-engineering and cutting-edge design. Rarely does one find such a sublime marriage of form, function and manufacturing integrity in any field. Individually crafted and carefully measured in KEF’s highly accurate anechoic chambers, each loudspeaker comes with a certificate showing its unique frequency response curve, signed by the skilled craftsman who made it in KEF’s Maidstone workshop.

Categories: , Tags:



MUON is the result of KEF engineering prowess combining with world-class industrial design by Ross Lovegrove. The Muon is limited to an edition of 100 pair.


Download Brochure

Additional information


Four-way closed box floorstanding loudspeaker ACE enclosure


H x W x D: 2000 x 600 x 380 mm (78.8 x 23.6 x 15 in.)


115kg (253lbs)

Drive units

6 x 250mm (10in.) LF,
1 x 250mm (10in.) LMF,

Uni-Q driver array:
MF: 1 x 125mm (5in.) Li-Mg-Al /LCP, hybrid cone
HF: 1 x 25mm (1in.) vented aluminium dome, featuring KEF's
unique 'Tangerine Waveguide'

Frequency response

25Hz to 60kHz * (±3dB)

Crossover frequencies

120Hz, 300Hz, 2.3kHz

Amplifier requirements

100 to 400W (typical)


90dB (2.83V/1m)

Input impedance

4 Ohms

Low frequency extension

20Hz (-6dB) *

High frequency extension

100kHz (-10dB) *

Maximum output