# KEF Muon

Floorstanding passive loudspeaker, made by KEF (🏴󠁧󠁢󠁥󠁮󠁧󠁿 GB-ENG).

Source: https://truescaleaudio.com/en/speaker/kef-muon
Manufacturer page: https://international.kef.com/products/muon

## Dimensions

| Dimension | Metric | Imperial |
| --- | --- | --- |
| Height | 2000 mm | 78.7 in |
| Width | 600 mm | 23.6 in |
| Depth | 380 mm | 15 in |
| Weight (each) | 115 kg | 254 lb |

Width is the cabinet. Including the plinth or outriggers it spans about 647 mm (25.5 in).

## Drivers

- 1 × 25 mm (1 in) tweeter — vented aluminium dome, Uni-Q array, with KEF's Tangerine Waveguide
- 1 × 125 mm (5 in) midrange — Li-Mg-Al/LCP hybrid cone, Uni-Q array — the tweeter sits in its acoustic centre
- 1 × 250 mm (10 in) mid-bass — aluminium cone, the low-mid unit, crossed between 120 and 300 Hz
- 6 × 250 mm (10 in) woofer — aluminium cone, four on the front and two on the back, all below 120 Hz

## Specifications

| Specification | Value |
| --- | --- |
| Type | Floorstanding |
| Power | Passive |
| Enclosure | Sealed |
| Frequency response | 25–60000 Hz (±3 dB) |
| Crossover | 120 / 300 / 2300 Hz |
| Sensitivity | 90 dB |
| Impedance | 4 Ω nominal |
| Recommended amplifier | 100–400 W |
| Price (USD) | $224,999.98 / pair |

## About

Two metres of superformed aluminium, shaped by Ross Lovegrove and limited to a hundred pairs. Each cabinet is a single sheet of aluminium heated and blown into shape — the process comes from aerospace rather than furniture, and it is what allows a wall this curved with no join and no bracing to be quiet. Four ways and eight drivers: a Uni-Q array with a 25 mm vented aluminium dome inside a 125 mm Li-Mg-Al/LCP midrange, a 250 mm low-mid below it, and six more 250 mm bass drivers, four facing forward and two facing back. Closed box throughout, with KEF's ACE filling — activated carbon that makes the air inside behave as though the cabinet were larger — which is how a sealed enclosure reaches 25 Hz within ±3 dB and 20 Hz at −6 dB. First handover at 120 Hz, then 300 Hz and 2.3 kHz. 90 dB into a 4-ohm load, 118 dB maximum, 115 kg a side. The design dates from 2007 and KEF has kept it in the range since.

## See it to scale

This catalogue draws cabinets at their real size side by side, which no text version can reproduce. Compare the KEF Muon against another speaker at https://truescaleaudio.com/en/compare?a=kef-muon