Sennheiser CX 686G vs Beyerdynamic IDX 120 IE – Key Differences & Best Choice (2026)

- Inline smart remote and mic on the cable are compatible with most smartphones and portable players (including Android, Windows Mobile and Blackberry devices) - Maximum ruggedness and durability â€“ Sweat and water-resistant - Sealed in-ear-canal design for improved blocking of outside noise - Antimicrobial ear adapters (SteriTouch) - Slide-to-fit system is fully adjustable for an individualized fit - Para-aramid-reinforced cable provides superior strength and reliability - Oval-shaped cable ensures a tangle-free listening experience and reduced cable noise - Convenient storage pouch and cable clip included - 2-year warranty

- 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

Key Differences

Impedance levels vary (20 Ohms vs 47 Ohms), which can affect compatibility and audio output when used with different devices. In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. If you're comparing Sennheiser CX 686G and Beyerdynamic IDX 120 IE, both models offer a strong combination of sound performance, comfort, and modern wireless features. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Both headphones are equipped with capable drivers that deliver balanced sound output suitable for music, calls, and entertainment. The frequency response differs (18 Hz -20000 Hz vs 12 Hz - 23000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. There is a noticeable difference in weight (NA vs 53 g), which may affect comfort during extended use.

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

Top Differences

Weight: NA vs 53 g
Impedance: 20 Ohms vs 47 Ohms

Compare Sennheiser CX 686G with:

Compare Beyerdynamic IDX 120 IE with:

Key Differences

Top Differences