I bought a set of these 8 years ago because of the extra bass feature. For the size & price nothing else ever compared. I lost them & found them ,by then they were falling apart but still worked . Being that I found them I was able to research & was very please I could still get a set. Great sound makes you feel as if you are listening to a large old school powerful system in a room.
Sound is clear with great bass, fits very well in the ear canal & stays put.I use it in the helmet while riding a motorcycle, it also reduces wind noise dramatically.