Sennheiser RS 180 vs Sennheiser MM 400-X – Full Comparison & Verdict (2026)

- Total Harmonic Distortion (THD): Less than 0.5 % a 1 kHz, 100 dB SPL - Automatic level control for optimum audio levels - Multi-receiver transmission - Up to 4 people listening to the same source - Multi-purpose transmitter - Also functions as easy-charge cradle and docking station - Balance control for right/left volume adjustment

- CD quality audio â€“Featuring the apt-XÂ® codec, the headsets can connect wirelessly to any BluetoothÂ® apt-XÂ® enabled devices, such as the new Apple computers and selected Creative and Samsung music products - Wireless freedom â€“ BluetoothÂ® 2.1 guarantees hands-free convenience without wires and the advanced A2DP profile for Stereo BluetoothÂ® delivers optimized hi-fi stereo sound - Invisible microphone â€“ with high-performance sound quality for clear conversations - Direct cable option â€“ for use on airplanes, with an airline adapter included - Easy headset controls â€“ in one intuitive cluster - Sennheiser sound quality â€“ hi-fi headphone drivers ensure superior dynamic range, detail and excellent bass - Wearing comfort â€“ padded ear-cushions provide an excellent soft fit, even on long trips - Easy-2-GO â€“ the headset folds into a compact bundle for travel and storage, while the headband is metal-reinforced for durability - Flexible â€“ replace the battery with a s

Key Differences

Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. Impedance levels vary (32 ohms vs 32 Ohms), which can affect compatibility and audio output when used with different devices. The frequency response differs (18 - 21000 Hz vs 15 Hz - 22000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Sennheiser RS 180 and Sennheiser MM 400-X offer different noise cancellation capabilities (No vs NA), which can impact how effectively they block external noise. Battery life varies between the two (24 hrs vs 10 Hrs music, 20 Hrs talktime), which affects how long you can use them on a single charge. Both headphones are equipped with capable drivers that deliver balanced sound output suitable for music, calls, and entertainment. Overall, both headphones are feature-rich and cater to users looking for a combination of sound quality, comfort, and wireless convenience. There is a noticeable difference in weight (204 g (without battery) vs 105 g), which may affect comfort during extended use. Sennheiser RS 180 and Sennheiser MM 400-X are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features.

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: 24 hrs vs 10 Hrs music, 20 Hrs talktime
Noise Cancelling: No vs NA
Weight: 204 g (without battery) vs 105 g

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Key Differences

Top Differences