Sennheiser RS 275

Description – Even More Power on Demand Designed for maximum simplicity, the RS 275 can be set up in just a few minutes after unboxing. Users can optionally further enhance their experience with the free Sennheiser Smart Control Plus app (Android, iOS). The app allows customization of additional features such as transparency mode, left–right balance adjustment, hearing profiles, audio modes based on the type of device, locating a misplaced headset, and much more.In terms of clarity, the headphones benefit from the brand’s in-house acoustic expertise, renowned for vocal intelligibility and an immersive bass response. The system offers several easy-to-use tools to enhance both dialogue and immersion—all at a volume level that won’t disturb light sleepers or neighbors. Flawless Signal | TV Transmitter The included BTA1 TV transmitter relies exclusively on Auracast technology, delivering full wireless coverage throughout your entertainment space for compatible devices—headphones, earbuds, hearing aids, or speakers—using this open standard. This connectivity hub integrates numerous input options and advanced audio enhancement features, allowing for simple and efficient integration into virtually any setup.Top-mounted buttons allow manual switching between sources and audio modes, including virtual surround sound and enhanced voice clarity when using TV or HDMI ARC sources. Naturally, it is also possible to connect a smartphone to the BTA1 via Bluetooth to access settings such as automatic source switching, video delay compensation, and Auracast configuration—including broadcast name, password protection, and hearing-aid modes.Thanks to its combined optical and 3.5 mm jack inputs, the BTA1 easily connects to a wide range of devices: televisions, stereo systems, laptops, gaming consoles, and more. Its HDMI ARC input extends compatibility to TVs and A/V receivers capable of transmitting audio from built-in apps and services. Powered via a USB Type-A port, the BTA1 also features a USB Type-C output to recharge the headphones without the need for an additional adapter. Its discreet, low-profile design fits perfectly on the included headphone stand or can be subtly placed near your audio source. – A Customizable Experience When connected to the Smart Control Plus app, the headphones can adopt audio presets or custom equalizer settings, along with bass enhancement and other listening optimization tools. This allows the user to emphasize clarity or warmth in the sound, according to personal preference, and apply these adjustments to the overall acoustic signature of the HDR 275. A selectable noise reduction mode is also available to reduce background noise and static hiss, while unifying the signal into mono—ideal for rediscovering classic films and TV series under optimal conditions. Comfort and Practicality The HDR 275 was designed for long viewing sessions. Exceptionally lightweight, it delivers an airy, barely-there feel. Its soft ear cushions keep ears cool thanks to a breathable, luxurious fabric, ensuring a custom fit that is almost forgotten once worn. Large textured buttons provide precise and intuitive control of volume (up to 106 dB), power, and even incoming calls. A single charge delivers up to 50 hours of listening, while charging via the transmitter’s USB Type-C port or a standard household charger offers maximum flexibility. Both the ear cushions and the battery are user-replaceable, ensuring long-term durability at the heart of your multimedia setup. Finally, a sturdy metal headphone stand keeps everything neatly organized and elegant.   – Specifications Wearing style Wireless headband Ear coupling Over-ear Connectivity Bluetooth Auracast™, Bluetooth 5.4, USB Transmission frequency / modulation 2,400 – 2,483.5 MHz / BLE: GFSK Supported profiles A2DP, AVRCP, HFP, HSP, GATT, PBP, BAP Supported codecs LC3, AptX, SBC, AAC, AptX Adaptive Speaker principle Dynamic Speaker type/size 37 mm diameter Speaker frequency range 6 Hz to 22 kHz (-10 dB) Speaker sensitivity 104 dB SPL (1 kHz / 0 dB FS) Speaker THD <0.3% (1 kHz / 100 dB SPL) Active Noise Cancellation No. Passive damping with Ambient Awareness mode. Mic principle MEMS Mic frequency range 50 Hz to 10 kHz (–3 dB) Mic pick-up pattern 2 omni-directional microphones Battery lifespan Up to 50 hrs playtime via Bluetooth (test condition: music playback with AAC codec, medium volume level) Charging time Approx. 2 hrs for full charge Battery type Replaceable, rechargeable lithiumpolymer battery Power supply 3.7 V⎓, 420 mAh, 1.554 Wh USB charging via USB-C socket at BTA1 Magnetic strength field 1.9 mT Product weight Ca. 195 g (6.9 oz) Product dimension folded flat 160 x 210 x 80 mm (6.3 x 8.27 x 3.15 in)