The CX 685 is part of the Sennheiser/adidas series of sports headphones. Developed and designed with professional athletes， the series offers improved fit， comfort and acoustics for even the toughest workouts. The CX 685 delivers natural sound and an acoustically closed design. The rugged， water resistant construction features para-aramid reinforced cables， strain-relief parts and a slide-to-fit holding mechanism to ensure a perfect fit.
Sennheiser is the brand of choice for many high-profile recording artists and live sound engineers， delivering the ultimate audio experience to people who crave true-to-life sound. For over 65 years， Sennheiser has applied its in-depth audio research to the development of premium headphones and microphones. Every Sennheiser product endures rigorous quality control tests to ensure you receive durable， great-sounding gear that will withstand daily use in a variety of environments.
The CX 685 features an acoustically closed design， making it a perfect choice for indoor use.
... consumers who are passionate about sports and music.
The CX 685 SPORTS is an ear-canal phone with a frequency response of 18 to 20，000 Hz.
The CX 685 is covered by a 2-year warranty.
| Headphones | |||
| Frequency response | 18-20，000 Hz | ||
| Sound pressure level (SPL) | 120 dB (1 kHz/1 Vrms) | ||
| THD-total harmonic distortion (1 KHz， 100 dB SPL) | <.05% | ||
| Impedence | 16 Ω | ||
| Weight | 149 g | ||
| Cable | |||
| Length | 1.2 m symmetrical cable | ||
| Connector plugs | 3.5 mm angled plug | ||
| Warranty | |||
| 2-year |
