Sennheiser RS 275 – Wireless Over Ear TV Headphone System

Sennheiser RS 275 – Wireless Over Ear TV Headphone System

Tired of negotiating the TV volume? This no-compromise, high-fidelity Bluetooth headphone and transmitter bundle gives you great sound and lets you watch TV your way. High-end Sennheiser drivers deliver immersive, perfectly synced sound and clear dialog with the cinematic immersion of Virtual Surround Sound, while the pre-paired transmitter and headphones set up in mere minutes.

• Wireless, over-ear, closed
• 37 mm dynamic transducer
• Frequency response: 6 Hz – 22,000 Hz (–10 dB)
• Bluetooth Auracast™, Bluetooth 5.4, USB connectivity
• Up to 50 m range (Auracast™); up to 25 m (Bluetooth Classic)
• Sound modes: Virtual Surround, Speech Clarity, Virtual Surround + Speech Clarity, Neutral
• Replaceable, rechargeable lithium-polymer battery; up to 50 hrs playtime
• Transmitter inputs: Optical (mini TOSLINK), HDMI-ARC, 3.5 mm analog, USB; broadcasts to unlimited Auracast™ headphones
• Weight: approximately 195 g (headphones); approximately 100 g (transmitter)
• Made in China
• 1 Year Warranty

Highlights & Key Technologies

Brilliant Virtual Surround Sound from Any TV
High-fidelity wireless audio without lag ensures sound and picture stay in perfect sync, with system latency of approximately 50 ms that keeps audio and video aligned for perfect lip-sync. High-end Sennheiser drivers and Virtual Surround Sound create a spacious, cinema-like listening experience from virtually any TV. The system is compatible with any TV featuring digital or analog audio output, and when connected to the BTA1 TV transmitter it can deliver up to 106 dB — significant volume headroom beyond the standard Bluetooth Classic output limit of up to 100 dB.

Speech Clarity and Personalized Hearing
Sennheiser Speech Clarity selectively amplifies human voices so dialogue is much easier to understand, emphasizing the frequency ranges of human speech while keeping the overall sound balanced and immersive. Four hearing profiles let you tailor the sound to common hearing needs, while a Normalize Volume feature evens out loud and quiet passages so you can hear everything during quiet moments without turning down the volume for louder scenes. Additional personalization via the Sennheiser Smart Control Plus app includes noise suppression, left/right balance control, mono downmix, and an equalizer, letting each listener customize their own sound without affecting others.

Comfort and Bingeable Battery Life
Up to 50 hours of playtime lets you watch as long as you like, and the connection remains stable across a range of up to 50 meters so you can roam freely around your home. The headphones are light and breathable with plush fabric ear cups for extended comfort. The rechargeable battery is user-replaceable and the ear pads can be replaced as well, extending the product's service life. A quick-charge function provides approximately 7 hours of playback after 10 minutes of charging.

Effortless Setup and Flexible Listening
The bundle comes pre-paired to eliminate setup hassles — just plug in the transmitter, turn on the headphones, and you're connected. It works with any TV with optical or analog connection, and the transmitter also offers HDMI-ARC and USB inputs. As Bluetooth headphones, the HDR 275 can also connect to a phone, tablet, or other Bluetooth Classic devices for music and calls. An included headphone stand neatly stores the headphones and transmitter to keep your setup organized.

Watch Together with Auracast™
Enabled with Bluetooth Auracast™ technology, the transmitter broadcasts audio to as many Auracast™-enabled headphones as you like, with each listener enjoying independent volume and feature settings. You can leave the TV speakers on for others, or share the same audio stream with family and friends. The BTA1 broadcasts Auracast™ audio openly with no pairing needed; for privacy, encryption with a password can be enabled via the Smart Control Plus app.

Replaceable Battery and Long Service Life
The batteries last for an average of up to 12 years (connected to BTA1, 70% volume, 5 hours per day, never heated by sunlight, never deeply discharged) and are easily replaceable, so you don't have to buy a whole new TV listener once they are no longer giving full satisfaction. The TV headphones are Bluetooth 5.4, LE Audio, and Auracast™ Broadcast Audio certified, and pass-through charging lets you listen while charging.

Details & Specifications

MODEL INFORMATION
System model: RS 275
TV headphones model: HDR 275
TV transmitter model: BTA1
Headphone stand model: HZS1
Article number (SKU): 700440
UPC: 810091273418

HDR 275 TV HEADPHONES — AUDIO
Wearing style: Wireless headband
Ear coupling: Over-ear
Acoustic principle: Closed
Transducer principle: Dynamic
Transducer size: 37 mm
Frequency response: 6 Hz to 22 kHz (–10 dB)
Sound pressure level (SPL): 104 dB SPL (1 kHz / 0 dB FS)
Total harmonic distortion (THD): < 0.3% (1 kHz / 100 dB SPL)
Active Noise Cancellation: No; passive damping with Ambient Awareness mode
Magnetic field strength: 1.9 mT

HDR 275 TV HEADPHONES — MICROPHONE
Microphone principle: MEMS
Microphone frequency range: 50 Hz to 10 kHz (–3 dB)
Microphone pick-up pattern: 2 omni-directional microphones

HDR 275 TV HEADPHONES — WIRELESS
Connectivity: Bluetooth Auracast™, Bluetooth 5.4, USB
Version: Bluetooth 5.4 certified, class 1
Transmission frequency: Classic BDR/EDR and BLE 1M: 2,402 MHz to 2,480 MHz; BLE 2M: 2,404 MHz to 2,478 MHz (without 2,426 MHz)
Modulation: BLE: GFSK; BT Classic BR & EDR: GFSK, π/4 DQPSK, 8DPSK
Supported profiles: A2DP, AVRCP, HFP, HSP, GATT, PBP, BAP
Supported codecs: LC3, aptX™, aptX™ Adaptive, SBC, AAC
Output power (RF): 10 mW (max.)
Number of active connections: 2
Device name: HDR 275
Range: Up to 50 m (Auracast™); up to 25 m (Bluetooth Classic)
System latency: Approximately 50 ms
Maximum volume: Up to 100 dB (Bluetooth Classic); up to 106 dB (via BTA1 TV transmitter)

HDR 275 TV HEADPHONES — POWER
Power supply: Replaceable, rechargeable lithium-polymer battery: 3.7 V, 420 mAh, 1.554 Wh
USB charging: via USB-C socket, 5 V, 500 mA max.
Charging time: Approximately 2 hrs
Operating time: Up to 50 hrs (music playback via Bluetooth, AAC codec, medium volume level)
Quick charge: Approximately 7 hrs playback after 10 minutes of charging
Compatible replacement battery: BA 275

HDR 275 TV HEADPHONES — PHYSICAL
Weight: Approximately 195 g (6.9 oz)
Dimensions folded flat: 160 x 210 x 80 mm (6.3 x 8.27 x 3.15 in)
Temperature range: Operation 0°C to +40°C; charging +5°C to +40°C; storage –20°C to +60°C
Relative humidity (non-condensing): Operation 10 to 80%; storage 10 to 90%

BTA1 TV TRANSMITTER
Power supply: Input 5 V, 1000 mA max. (USB power via TV or external USB source); Output 5 V, 500 mA max. (USB port for charging headphones)
Inputs:
– Digital input: Optical mini TOSLINK — supported data streams: Stereo PCM 44.1–48 kHz / 16–24 bit, AC-3 (Dolby Digital) max. bit rate 640 kbps
– Digital input: HDMI-ARC — supported data streams: Stereo PCM 44.1–48 kHz / 16–24 bit, AC-3 (Dolby Digital) max. bit rate 640 kbps; certified to HDMI 1.4b standard including ARC
– Analog input: 3.5 mm stereo jack socket
Version: Bluetooth 5.4 certified, class 1
Transmission frequency: BLE 1M: 2,402 MHz to 2,480 MHz; BLE 2M: 2,404 MHz to 2,478 MHz (without 2,426 MHz)
Profiles: BAP, PBP
Output power: 10 mW (max.)
Codec: LC3
Modulation: BLE: GFSK
Device name: BTA1 TV Transmitter
Number of active connections: Broadcast audio: recommended less than 250
Weight: Approximately 100 g
Dimensions: Approximately 129.9 x 20.4 x 55.9 mm (W x H x D)
Temperature range: Operation 0 to +40°C; storage –20 to +60°C
Relative humidity: Operation 10 to 80%, non-condensing; storage 10 to 90%

TRANSMISSION (SYSTEM)
Transmission frequency / modulation: 2,400 – 2,483.5 MHz / BLE: GFSK
HAZMAT UN #: UN3481

INCLUDED ACCESSORIES
HDR 275 TV headphones with user-replaceable battery
BTA1 TV transmitter
TV Audio digital cable (TOSLINK optical to 3.5 mm mini TOSLINK)
TV Audio analog cable (3.5 mm)
USB A-C cable
USB C-C cable
HZS1 headphone stand
2 cable clips
User information / quick guide