At the NAMM Show (Anaheim, California, 18-21 January 2001) Sennheiser will be launching the RS30, 40, 60 and 80 wireless headphones. As the showcase model in the series, the RS60 uses SRS Labs' headphone enhancement technology to include switchable surround sound, delivering a realistic and spacious listening experience through stereo headphones. SRS processing is based on the same psycho-acoustic principles which allow us to hear sounds in three dimensions, and is unique because it achieves without the use of special recording techniques. Frequency response is a full 20Hz to 20kHz, with up to 100dB of sound output.
