High impedance loudspeaker
The base of the loudspeaker is made of cast metal. The three feet end in a claw, holding a ball. The neck is made of brass, the flare is made of aluminium, painted dark purple. By turning the big knurled knob in the base, the distance between the magnet and the diaphragm can be changed.
Made in: 1924
Purchased in: 2005
Sold in: 2023
Serial number: 702385
Dimensions: height 64 cm, diameter of the flare 36 cm
DC resistance: 2000 Ohms

What was recorded in 1924?


Listen to "Dream Daddy" by the Romaine Dance Orchestra, recorded on November 5, 1924

Company history

Burndept operated in Blackheath, south-west London from 1921 to 1931, producing some of the finest quality early radios, from small crystal sets to powerful four-valve loudspeaker-linked receivers. The brand name was Ethophone (Ethovox for the loudspeakers). They were the first to put domestic radio receivers into cars, aeroplanes, houseboats and yachts.

The company made a delivery van in the form of a giant Ethophone V model (1923, picture above), and placed a receiver on a hand cart with an aerial and loudspeakers. Unfortunately, like many pioneering organisations, Burndept saw the large market going to manufacturers less interested in novelty and more in cheapness and mass production. By 1927 the firm was in deep financial difficulty and was placed into receivership. In 1934 the old name was resurrected when it was bought by a Thomas Cole, a battery maker, who opened a factory at Erith and took on those Burndept staff who wanted to join him. His new trading name was Vidor. It remained a factory, passing through the ownership of various electrical manufacturers including Siemens and GEC, but it was demolished in December 1995.
The Ethovox brand name and the BBC logo in the flare of the horn
The Burndept factory in Blackheath
Advertentisement for the Ethophone V radio together with an Ethovox RL2/20 loudspeaker in Wireless Weekly, October 22nd, 1924

This page was last edited on 16.12.2023