In my experience, wireless headphones were always a cool gimmick, but when it came to audio quality, it was best to stick with wired ones, even though wireless headphones are pretty convenient. The new Sennheiser RS 220 Wireless Headphones seek to change this thanks to some improvements in wireless technology.
The RS 220 use the audio tech from Sennheiser’s popular HD 600 series, which by themselves retail for $519.95, and pair them with an uncompressed digital signal sent over a 2.4GHz connection, using DSSS technology. This is supposed to maintain audio fidelity up to 300 feet away (line of sight), even in environments with lots of wireless devices. Range is decreased to about 100 feet if you’re dealing with wall and other obstacles, though.
Headphone specs include a frequency response from 16 to 22,000 Hz, a maximum SPL of 106db, and a S/N ratio of 90 db and less than 0.1% THD. Battery life for the ‘phones is rated at appx. 6 to 8 hours on a charge. Analog, coaxial, and optical inputs are built into the transmitter, which also doubles as a recharging dock.
The RS 220 headphones retail for $599.95 (USD). Anyone wanting some higher-end wireless headphones should definitely add these to their evaluation list.