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Sennheiser's 'Loss-Free' Wireless Headphones, 100m Range

By Tony Ibrahim | Wednesday | 29/02/2012

Sennheiser's new headphones work with a wireless transmitter to create 'loss-free' wireless audio within a 100 metre range.

The wireless headphones market has been somewhat of a unicorn. Everyone wants to produce headphones capable of riveting sound, but ditching the cabling has often proven antithetical to such a pursuit. Just like a unicorn, it has been elusive and borderline mythological.

Yet as technology advances, wireless communications find itself in everything from portable disk drives (see SeaGate's GoFlex Satellite) and next-gen Smart TVs. Now however, Sennheiser has fused this technology with its existing sound repertoire to produce wireless headphones that don't skimp on sound quality.

They're called the RS 220 and despite their alphanumeric nonsensical name, they look rather special. That's partially owed to their glossy black finish which endows these cans with a sense of allure, striking a pleasant contrast with its sumptuous ear cups.

The remainder of the credit belongs to the wireless transmitter, which props the earphones up when not in use, as if they're the main attraction on display at an audio convention or sorts.

Click to enlarge

Essentially your audio source plugs directly into the wireless transmitter (coaxial digital, optical digital and analogue inputs at the back) which then transmits your tracks wirelessly over a 2.4GHz connection using the Direct Sequence Spread Spectrum (DSSS) technique. The sound is spread across a wide 22MHz frequency several times over, only damaging a minimal—and more importantly—inaudible part. The result is an uninterrupted and 'loss-free' playback experience. 

The transmitter has a 100 metre range and will work even you're using the headphones in a different room. 

The headphones do their part in outputting clear sound and audio volume right up to 106 decibels (bear in mind 120 decibels is the threshold of pain) and span a frequency response range of 19 to 21,000 hertz. They're padded for comfort and aim at replicating the wondrous sensation of being in the mosh pit of a live concert, less the bruising.

Click to enlarge

Sennheiser's RS 220 is an excellent addition to the home, complementing an existing home theatre set up, but with the added perks of privatising your music and offering the freedom of mobility. They'll be in stores shortly with a recommended retail price is $649.95.

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