Sound+Image - - Sennheiser -

The in­frared trans­mis­sion sys­tem that Sennheiser had de­vel­oped for hear­ing aids in the 1980s led to a con­sumer first in 1993 — the IS 850 in­frared wire­less head­phones, and then in 1995 the ra­dio fre­quency RF 5 head­phones. To­day we tend to re­mem­ber early in­frared and RF head­phones as suf­fer­ing from drop-outs and swishy sound, but they de­liv­ered a new free­dom from cable con­nec­tions for users back in 1993, and they rep­re­sented a cru­cial link in the chain to­wards to­day’s easy Blue­tooth pair­ing and CD-qual­ity wire­less de­signs. Sennheiser’s later ‘RS’ range be­came firm Sound+Im­age favourites when they de­buted in 2012 us­ing Kleer wire­less tech­nol­ogy, while the sub­se­quent se­ries used “pro­pri­etary” wire­less; both gar­nered awards for de­liv­er­ing flaw­less sig­nal trans­mis­sion and ex­cel­lent sound qual­ity.

ABOVE: The award-win­ning RS 180 home head­phones with dig­i­tal wire­less trans­mis­sion.

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