Disc shaped magnetodynamic loudspeaker
Made in: ± 1927
Dimensions: 40 x 43 x 11 cm (depth not including the stand)
Purchased in: 2004

What was broadcast in 1927?


Listen to "Oome Ko heeft radio" sung by Kees Pruis, with orchestra, recorded in 1927


The loudspeaker was on display in the Van Abbemuseum in Eindhoven from June 9th, 2012 until November 11th, 2012.
The Philips 2003 on a Brandsteder radio cabinet (a Philips 2501 is inside) at the exhibition. June 15th, 2012.


Back, detail

Back, original "PR" (Philips Radio) seal

Another disc loudspeaker

Loudspeaker plug with tone corrector
Plug with tone corrector, the Philips 4004
This correcting device was used in combination with output pentodes like the B443. Due to the higher internal resistance of these tubes the loudspeaker sounded too shrill The built-in capacitor (10nF) lowered the amount of treble.

French postcard
Ir Louis Christiaan Kalff, (1897–1976) did a lot of design work for Philips. Kalff started his career in 1925 as chief of the Philips Advertising Studio. He made designs for posters, advertisements, brochures, folders and package materials. He also designed radios (the Philips 2501, 2502 and 2514) and disc loudspeakers (e.g. the Philips 2003). He was an architect as well and in this capacity designed a number of Philips factories and the Evoluon.

Kalff was active as designer of posters (Holland-America line, Jaarbeurs Fair in Utrecht, Calvé) and exhibitions. As an architect he designed the Sterrenkundig Observatorium (Astronomical Observatory) in Eindhoven.

Louis Kalff

Folder by Mathieu Clement, 1927

This page was last edited on 26.04.2017