Beyerdynamic IDX 120 IE vs Sony MDR-EX31BN – Key Differences & Best Choice (2026)

- Powerful, balanced sound - Neodymium HD acoustic drivers - Rugged, but lightweight metal housing - Flat cables - Remote control and microphone for phone calls and media playback - Compatible with Apple devices such as iPods, iPhones, iPads - Angled 4-pole mini jack plug (3.5 mm) - Extensive supplied accessories Supplied Accessories - 7 sizes of silicone eartips (5 types bowl shape, 1 type double flange, 1 type triple flange) - 1 size of original Complyâ„¢ eartips (type T-400) - Adapter plug to share your music with friends - VoIP-Adapter - Extension cable (90 cm) - Cable clip for secure and firm hold - Convenient and sturdy hard case with zip fastener

- Wireless Stereo Dynamic In-Ear Headset - 13.5mm high sensitivity driver - Hybrid silicone rubber earbuds (S,M,L) supplied fitting and long-term wearing comfort - Bluetooth Power Class2, Noise Cancelling set Bluetooth - Output :- Bluetooth power class2 - Maximum Communication Range :- Line of sight approx. 30ft (10m) - Frequency Band :- 2.4GHz band (2.4000GHz-2.4835GHz) Microphone - Unit/Type :- Electret Condenser - Directivity :- Omnidirectional Microphone - Frequency Range :- 100Hz - 4,000Hz General - Type :- Closed, dynamic - Power Source / Battery Type :- Built-in Li-ion Rechargeable Battery - Battery Life :- (NC ON) Approx. 9.0 Hours, (NC OFF) Approx. 10.5 Hours - Battery Charging Time :- Approx. 2.5 Hours

Key Differences

Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. From a usability standpoint, both models provide a reliable and premium headphone experience. The frequency response differs (20 - 20,000Hz vs 12 Hz - 23000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Impedance levels vary (16 ohm (1KHz) vs 47 Ohms), which can affect compatibility and audio output when used with different devices. There is a noticeable difference in weight (Approx 34g vs 53 g), which may affect comfort during extended use. If you're comparing Sony MDR-EX31BN and Beyerdynamic IDX 120 IE, both models offer a strong combination of sound performance, comfort, and modern wireless features. Sony MDR-EX31BN and Beyerdynamic IDX 120 IE offer different noise cancellation capabilities (Yes vs NA), which can impact how effectively they block external noise. The driver size differs between the two (13.5mm vs NA), which can influence sound depth, bass response, and overall audio clarity.

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

Top Differences

Noise Cancelling: Yes vs NA
Driver Size: 13.5mm vs NA
Weight: Approx 34g vs 53 g
Impedance: 16 ohm (1KHz) vs 47 Ohms

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Key Differences

Top Differences