The single-hole cassette, (from German Einloch-Kassette),[1][2] was a concept of a high fidelity suitable magnetic tape cartridge or cassette from Philips for analog recordings. Tape and tape speed were identical to the Compact Cassette.[3] It was never released to the public.[4]
- ^ (German) Sebastian M. Krämer: Ohrfutter aus der Jackentasche – 50 Jahre Kompaktkassette, Südwestrundfunk 2 – Wissen. Dossier to the audio broadcast of 9 December 2013
- ^ Radio Elektronik Schau (in German). Vol. 41. 1965. p. 385.
- ^ Sueltz, Uwe H. (2016-12-15). Compact Cassettes Milestones - Philips 1963 - 1999 - including Norelco and Mercury & a Selection from A - Z / 1963 - 2017. BoD – Books on Demand. ISBN 9783743142893.
- ^ (German) Innen und Außenansicht der Einloch-Kassette von Uwe H. Sültz, Lünen, 8 July 2013, retrieved 11 February 2023