Sennheiser RS 120 II vs Audio Technica ATH-CKS30TW+ – Which One Should You Buy? (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.

Automatic power-on when removed from the case. Siri and Google Assistant support at the touch of a button for voice control. Low latency mode to watch videos or play games with minimal sound delay. Out of Range Alert and Product Locator for finding the earbudsâ€™ last location. Soundscape function via the A-T Connect App for improved focus or relaxation. Turn noise-cancelling off to get up to 7.5â€¯hours of use from each headphone or 20â€¯hours of use with the charging case. Multipoint pairing function to stay connected to two Bluetooth devices at once and re-pair easily through the A-T Connect App. Adjustable touch sensor sensitivity to improve operation and adjustable volume steps to get the perfect listening comfort for your ears. Up to 6.5â€¯hours of use from each headphone when fully chargedâ€”even with noise-cancelling turned onâ€”orâ€¯17.5 hours of use with both the headphones and charging case fully charged.

From a usability standpoint, both models provide a reliable and premium headphone experience. Sennheiser RS 120 II and Audio Technica ATH-CKS30TW+ are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. The frequency response differs (22 Hz - 19500 Hz vs 5Hz - 20KHz), which can influence how well the headphones reproduce lows, mids, and highs. Sennheiser RS 120 II and Audio Technica ATH-CKS30TW+ offer different noise cancellation capabilities (NA vs CVC), which can impact how effectively they block external noise. The driver size differs between the two (NA vs 9 mm), which can influence sound depth, bass response, and overall audio clarity. Impedance levels vary (24 ohm vs 20 ohm), which can affect compatibility and audio output when used with different devices. Battery life varies between the two (20 Hours vs 6.5 Hours), which affects how long you can use them on a single charge. There is a noticeable difference in weight (200 gm vs 30 GM), which may affect comfort during extended use. Sennheiser RS 120 II uses Bluetooth NA while Audio Technica ATH-CKS30TW+ supports Bluetooth 5.1, which can impact connectivity stability and efficiency.

Verdict: Both models are competitive, and your decision should be based on your usage needs and preferred features.

Top Differences

Battery Life: 20 Hours vs 6.5 Hours
Noise Cancelling: NA vs CVC
Driver Size: NA vs 9 mm
Bluetooth: NA vs 5.1
Weight: 200 gm vs 30 GM

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Top Differences