Keesonic Loudspeakers

Keesonic Loudspeakers were designed by Peter Keeley and built in a factory in Cookham Dean, near Marlow, Bucks, UK. Five models were available during the 1980s.

## Contents

* 1 Kub
* 2 Kolt
* 3 KRF
* 4 KBM
* 5 701A
* 6 Peter Keeley
* 7 See also
* 8 References

## Kub

Keesonic Kub; compact, two-way, bass reflex loudspeaker. Grille installed in this photo. Keesonic Kub; compact loudspeaker. Grille removed in this photo to show drivers

One of the original designs, the Keesonic Kub was launched in the early 1980s.

The Kub was a compact, two-way, bass reflex loudspeaker using a 5.25-inch diameter paper cone woofer (with flexible rubber surround) and a 3" paper cone tweeter. The paper cone tweeter looks very different from the silk or metal dome tweeters seen in many modern loudspeakers. Cone tweeters are more directional than dome tweeters and consequently the listening 'sweet spot' tends to be much smaller. The bass port, which vents air taken from the space behind the woofer, is mounted on the front of the enclosure.

The Kub enclosure is covered with real wood veneer and is approximately the same size as its contemporary competitors, the Linn Kan and the BBC LS3/5A. The grille is designed to be removable.

In the 1980s, the 'Council of Industrial Design' (CoID) considered the Keesonic Kub to be a 'good design' and it was consequently selected for display at the Design Centre, London. Some Kubs have an 'official' triangular label on the back bearing the slogan 'as selected for the Design Centre, London'.

## Kolt

A small 2-way speaker (smaller than the Kub). Based around a Seas 11F-GX Mid Bass driver and a 1" Treble Unit (Seas??) Designed for Mobile Broadcast Monitoring.

## KRF

A 3-way speaker with Peerless 25mm dome tweeter, Peerless 75mm midrange unit in its own internal enclosure, and a Dalesford 200mm bass unit in a ported cabinet.

## KBM

The KBM is a larger speaker with four drive units. The drive units are all mounted in line. The 250mm bass unit is manufactured by Dalesford and the mid-range and tweeter by Peerless and the super-tweeter by Coles. Two small circular vents are positioned at the bottom of the baffle for bass reinforcement.

## 701A

A two way ported design with integrated tilted wooden resonant stand. The tweeter is a 25mm soft dome covered by a perforated brass diffuser, and the bass driver is a Peter Keeley designed 200mm unit made by Elac with a bextrene cone.

It is believed that Keesonic went out of business in the mid eighties, after the success of making the speakers for Boot's range of hi-fi systems. When Boot's suddenly stopped selling hi-fi, Keesonics had little other business to maintain trading and thus went bankrupt.

## Peter Keeley

Prior to releasing the Keesonic Kubs, Peter Keeley helped Keith Monks develop and put into production the famous 'Keith Monks Audio' Record Cleaning Machine.[1]

## See also

* Loudspeaker
* Loudspeaker enclosure

## References

1. ↑ http://www.keithmonks-rcm.co.uk/makinghistory.html

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