Sennheiser RS 120 II vs Sony WF-C510 – Specs, Price & Comparison (2026)

2-year warranty. Appealing, modern design. Range of up to 100 metres (300 feet). Optional wall mounting of transmitter possible. Rechargeable NiMH batteries included (size: AAA). Open, stereo, supraaural, wireless RF headphone system. Suitable for all types of modern music and TV applications. Wireless freedom with reception through walls and ceilings. Very lightweight headphones, extremely comfortable to wear. Detailed, analytical sound reproduction with strong bass response. Transmitter with metal cradle for storing and recharging the headphones. Control elements conveniently positioned to provide easy, intuitive operation.

Superior sound quality. Make your music more natural. 360 Spatial Sound Personalizer. MULTIPOINT CONNECTION : Quickly switch between two devices at once. STAY CONNECTED : Ambient Sound Mode keeps you aware of your surroundings. POCKED SIZED CASE : Small and cylindrical, the charging case is made to fit your pocket or your bag. WATER RESISTANT : With an IPX4 resistance rating, splashes and sweat wonâ€™t stop these headphones â€“ so you can keep moving to the music. EASY HANDS- FREE CALLING : A built-in microphone provides you with hands-free calling. No need to even take your phone from your pocket. ALL DAY COMFORT : Light and compact to give you all-day comfort and designed for the ideal fit, for an exceptional all-round listening experience. LONG BATTERY LIFE & QUICK CHARGING : Up to 11 hours of battery life ( up to 22hrs with case ) with quick charging ( 5 min charge for up to 1 hour of playback ). EASY BUTTON OPERATION : Play, stop, skip tracks, adjust the volume, access your smartphoneâ€™s voice assistant and receive calls hands-free with the touch of a button.

Key Differences

The frequency response differs (22 Hz - 19500 Hz vs 20Hz - 20KHz), which can influence how well the headphones reproduce lows, mids, and highs. If you're comparing Sennheiser RS 120 II and Sony WF-C510, both models offer a strong combination of sound performance, comfort, and modern wireless features. Sennheiser RS 120 II and Sony WF-C510 offer different noise cancellation capabilities (NA vs Sound Isolation), which can impact how effectively they block external noise. The driver size differs between the two (NA vs 6 mm), which can influence sound depth, bass response, and overall audio clarity. Impedance levels vary (24 ohm vs 16 Ohms), which can affect compatibility and audio output when used with different devices. There is a noticeable difference in weight (200 gm vs 31 GM), which may affect comfort during extended use. Battery life varies between the two (20 Hours vs 8 - 11 Hours), which affects how long you can use them on a single charge. From a usability standpoint, both models provide a reliable and premium headphone experience. Sennheiser RS 120 II uses Bluetooth NA while Sony WF-C510 supports Bluetooth 5.3, which can impact connectivity stability and efficiency.

Verdict: Choosing between Sennheiser RS 120 II and Sony WF-C510 depends on whether you value better sound, longer battery life, or enhanced features.

Top Differences

Battery Life: 20 Hours vs 8 - 11 Hours
Noise Cancelling: NA vs Sound Isolation
Driver Size: NA vs 6 mm
Bluetooth: NA vs 5.3
Weight: 200 gm vs 31 GM

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Key Differences

Top Differences