In 1930 the company
was founded as Tefi-Apparatebau Dr.K. Daniel KG.in Porz bei Köln.
experimenting with storing sound on an endless
plastic tape by means of a trace system that is
also used on gramophone records, a combination
of tape recording and gramophone record.
The adjacent pressed-in tracks
are scanned by a fixed gramophone needle. The
high track density allows a playing time of a
few hours, more than with a traditional
In the 1930s, the company is commissioned
to produce various prototypes.The system is called
Dr. K. Daniel
After further simplification of the
system, the first Tefifon devices for the consumer
market are completed in 1950.
The tape is placed inside a cassette and
has a playing time of one hour.
Later on, larger cassettes were released, with a playing
time of 4 hours.
At the end of the 1950s, the company
introduced the first stereo cassettes
Tefi also makes radios after the war,
such as the small Tefi Zwerg and combinations of radio,
record player and Tefifon player. Television sets are
also part of the delivery program.
The Tefifon system seems to be successful, but the
increasing competition from the ever-evolving market of
gramophone records and tape recording devices puts an
end to the Tefifon system in the early 1960s and Tefi as
a manufacturer. In 1965 Neckermann takes over the
company and the products are sold in a closing sale.
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