Beovox M 100

(1978) 5-way Uniphase loudspeaker, 100W

Type number: 6309


When launched, the Beovox M 100 was the largest yet model in the Uniphase series. Generously rated at 100W, it was intended for use with the Beomaster 4400, or quality amplifiers from other manufacturers. The massive cabinets were of the familiar Uniphase shape, veneered in rosewood (teak was not available) with aluminium details and had removable cloth trims on fibreboard backing. The rear of the cabinets were finished in black and held in place by screws, an unusual detail made necessary as some of the drivers were fitted from behind the baffle. An overload protection circuit was fitted, complete with a red LED indicator lamp at the bottom of the front grille. The baffle itself was made of foamed resin (finished with thick black paint on the outside), and strangely was not braced to the rear panel. Text copyright © Beocentral. Unauthorised reproduction prohibited.

A total of five drive units were fitted. They comprised a 12” woofer made by SEAS, a 3” cone midrange (mounted in a sealed and reflex ported section of the cabinet) made by Peerless, a 2” dome upper-midrange made by ITT in Germany, a 1½" dome tweeter made by SEAS and a miniature dome upper-tweeter made by Philips. These drive units were connected to a crossover network of considerable complexity, which was fabricated on a fibreglass printed circuit board (as opposed to the more usual serrated fibreboard with the components bonded in place). The same printed circuit board also carried the components for the overload protection circuit. Text copyright © Beocentral. Unauthorised reproduction prohibited.

Sturdy metal stands were included with the Beovox M 100, each monogrammed on the front face with the model name. The angle of the loudspeakers could be adjusted on the stands by a screw at the rear. Text copyright © Beocentral. Unauthorised reproduction prohibited.

The final models were fitted with revised drive units and designated M 100-2, though the script on the front still said “Beovox M 100”. These models were replaced in the re-styled Uniphase range by the Beovox MS 150. Text copyright © Beocentral. Unauthorised reproduction prohibited.

Finishes/ colours

  • Rosewood



Type number


Further Reading

In print:

On the web: