Headphones

Data

2000 Ohm headphones. The set was developed in the twenties and was still being made in the fifties.

Sidney George Brown, the company founder, was a prolific inventor of electromechanical devices, including the "Microphone Amplifier" (1921) which permitted loudspeaker operation from a crystal set without the use of valves, and a gyro compass. He set up a business in Watford (North of London) in the year 1910 and later had a works in North Acton, London W3. The company eventually became part of the Racal organisation which in turn became part of Thales-Racal Acoustics.

Made in:	±1950
Purchased in:	2006
Sold in:	2023
DC resistance:	2000 Ohms

Detail

Data

A one sided earphone with a handle and a volume control knob in the bottom.

Sidney George Brown the company founder was a prolific inventor of electromechanical devices, including the "Microphone Amplifier" (1921) which permitted loudspeaker operation from a crystal set without the use of valves and a gyro compass. He set up a business in Watford (North of London) in the year 1910 and later had a works in North Acton, London W3. The company eventually became part of the Racal organisation which in turn became part of Thales-Racal Acoustics.