For a mid-range headphones as HA-S660, the audio quality is exceptional and isolation to the outside noise is more than satisfactory. The audio spectrum allows to distinguish the nuances in the treble while enjoying its remarkable depth in low and without a garish or nasal mediums. The adjustable headband, the quality of foams and size headphones provides good performance and well covers the whole ear, which avoids having sore ear lobes if extended wear (> 1 hour) .Deplus, it ensures good sound isolation from background noise. With these specifications, no need to over-ride to enjoy the sound with an almost hi-fi quality of his music. Aesthetic side, the design is simple and elegant with its inserts "inox", and is available in several color choices. The icing on the cake, the price, be sold off, is very reasonable. It is a product that I highly recommend to any music lover who seeks a compromise between comfort, quality and cost. :-)
