An integrated charger within the base-station keeps the headsets charged without user intervention beyond returning to base when not in use. They also share affordability, making high-performancewireless listening more accessible than before.
The RS 130 design is an open-backed headphone optimized for TV-sound and home-theater reproduction as well as music listening, while the RS 140 is a closed-back system engineered for maximum outputon music and TV-audio, with unique features to enhance intelligibility. The new Sennheiser base-station/chargers are similar, utilizing 900 MHz wireless transmission from base-station to headphone.The transmitters incorporate Sennheiser’s Intelligent Auto Tuning system, which automatically chooses the best of three available base-to-headset “channels†for low-distortion, noise-free operation,and even recalls the optimum choice when resuming from power-off for fast, glitch-free turn-on.
Both base stations incorporate on-hook charging for their headsets’ integral NiMH batteries, automatically refreshing these memory-effect-immune cells whenever they are replaced on theirholders.

The RS 130 relies on the latest evolution of Sennheiser’s famed “Open-Aire†headphone design to achieve natural, lifelike sound on music, film and TV audio. By incorporating SRS Headphone, the RS 130offers virtual surround sound. SRS Headphone is compatible with any non-encoded, 2-channel audio source.
Both new Sennheisers boast battery life from a single full charge of up to 23 hours for the RS 140 and 22 hours for the RS 130. Both also claim remarkably comfortable, long-term wearing, from carefulergonomic engineering and lightweight (275 and 280 grams) designs.
Suggested Retail PricesRS 130: $169.95
RS 140: $219.95
Availability: March 2005