The two 10mm dynamic speakers offer a powerful bass that does not cover the rest of the frequencies. The earphones offer a balanced sound, with the mid-range and low frequencies being played with in depth details, while the bass itself is strong enough.
The headphones have been tested with different styles of music and audio formats, ranging from the already classic mp3 to Flac. The signal range is good, it covers a distance of 25m. The sound isolation is acceptable, being enough to highlight the music.
The battery autonomy is approximately 8 hours of continue use while the charging takes around one hour.
In conclusion, the NuForce BE6i offers good sound quality and an 8-hour autonomy with an operating distance of up to 25m. Also, the IPX5 certification that ensures protection from dust and water is especially welcome for outdoor activities.