sound with plenty of the bass punch for which JBL is famous. If compact-but-powerful sounds like a winning combination, brace yourself for another one: lightweight-but-rugged. JBL 400 Series headphones are designed for hours of comfortable use. Here today, somewhere else tomorrow. Feel like taking a break? The JBL REF410 headphones are your featherweight solution for days on the road. Chill out and turn up the volume. These high-quality headphones provide fabulous sound and effective attenuation of ambient noise. Using the unique 3D-Axis mechanism, they fold down to a small package that you can take wherever you go.  (less)