Sennheiser RS 165 vs Sennheiser MOMENTUM Free – Detailed Specs Comparison (2026)

- TR 165 transmitter - Audio cable (analog) - Power supply with 4 adapters - 2 AAA NiMH rechargeable batteries - Closed, circumaural headphones with excellent digital wireless audio transmission - High-quality Sennheiser transducers and a selectable Bass Boost mode for vibrant sound - Intelligently designed controls for maximum ease of use - Multi-purpose transmitter â€“ also functions as â€˜easy-chargeâ€™ cradle and docking station - Multi-receiver transmission â€“ transmitter supports up to two pairs of headphones simultaneously - Ergonomic design for enhanced wearing comfort - 2-year warranty

Signature Sennheiser Sound. Cutting-edge Wireless Technology. The battery lasts for six long hours of listening pleasure. A premium product in every detail the momentum free features custom machined stainless steel in-ear sound tunnels that channel the sound from its high-quality dynamic speaker system lossless into the ear. Bluetooth 4.2, AAC codec support and Qualcomm apt-X support ensures crystal clear wireless transmission in true hi-fi sound. It communicates seamlessly with your mobile device thanks to a three-button remote and high-quality in-line microphone between the earpieces. Battery Specification: Built-in Rechargeable Lithium-ion Polymer (~85mAh) with more than 500 charges.

Key Differences

Sennheiser RS 165 and Sennheiser MOMENTUM Free offer different noise cancellation capabilities (NA vs Active), which can impact how effectively they block external noise. Impedance levels vary (32 Ohms vs 28 ohm), which can affect compatibility and audio output when used with different devices. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. The driver size differs between the two (NA vs 10 mm), which can influence sound depth, bass response, and overall audio clarity. There is a noticeable difference in weight (Approx. 300 g vs 17 gm), which may affect comfort during extended use. If you're comparing Sennheiser RS 165 and Sennheiser MOMENTUM Free, both models offer a strong combination of sound performance, comfort, and modern wireless features. The frequency response differs (18 Hz-21,000 Hz vs 15 Hz - 22000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. Battery life varies between the two (18 Hrs vs 6 Hours), which affects how long you can use them on a single charge.

Verdict: Both headphones offer strong performance, and the right choice depends on your priorities such as battery life, comfort, and noise cancellation.

Top Differences

Battery Life: 18 Hrs vs 6 Hours
Noise Cancelling: NA vs Active
Driver Size: NA vs 10 mm
Weight: Approx. 300 g vs 17 gm
Impedance: 32 Ohms vs 28 ohm

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Key Differences

Top Differences