The Yamaha NS-555 3-Way Floorstanding Speaker with dual 6.5" woofers, 5" midrange driver and 1" Aluminium Dome tweeter, features Highly Oriented Polyolefine design for improved transient response, higher power handling, and flatter frequency response. Magnetically shielded to allow placement near a TV without distorting the image.
Highly Oriented Polyolefine (HOP)
A better material for better sound. The dynamic range of Dolby Digital sound tracks places stringent demands on the speakers that reproduce it. That's why they developed an exclusive loudspeaker cone material: Highly Oriented Polyolefine (HOP). It's extraordinarily strong, yet amazingly lightweight (up to 30 times more rigid, per unit weight, than polypropylene). You get dynamic sound with low distortion and extraordinary transient response. HOP cone material combines high strength, low weight and low resonance, resulting in improved transient response, higher power handling and flatter frequency response.
With the Dolby Digital system, the surround channels are reproduced in full stereo, with the same full frequency response and dynamic range as the front. These receivers are build with just as much power to the surround channels as to the front. And that's why their speaker systems offer the same quality, front and rear.
Speakers placed too close to the TV can cause the pictures to bend and colors to bleed. This speaker incorporates magnetic shielding that's capable of eliminating any magnetic interference. You can place it anywhere - even directly beside your TV - without picture distortions and degradations.