The NS-B951 takes bookshelf speaker quality to a new level, providing transparent sound from all types of data-rich, high resolution sound sources. Even at high volumes, there is no loss of clarity or accuracy. The strikingly bold design matches the audio performance.
The large 16 cm (6-1/2”) woofer ensure that you can enjoy music at high volumes with no loss of clarity or accuracy. The diaphragm is Yamaha’s newest A-PMD (Advanced Polymerinjected Mica Diaphragm) which has improved cone paper. It also incorporates a powerful magnetic circuit with a large ferrite nonshielded magnet and a highly stiff aluminum diecast frame, for outstanding power handling and responsiveness. Taking advantage of the A-PMD’s extreme lightness, rigidity and stability, this woofer achieves smooth, fast response, and will capably reproduce high resolution sound sources.
The 3 cm (1”) dome tweeter is made of aluminum for both hardness and responsiveness, uses a neodymium magnet. It delivers sound that links the medium and high ranges with natural smoothness and transparency. Firmly integrating the diaphragm and voice coil and using a thick surround material increases the sound density and resolution in the high range. With a heavy aluminum diecast tweeter plate that minimizes unwanted resonances and an extremely fine mesh grill that provides ideal sound dissemination, it faithfully reproduces dense sound atmospheres and nuances from high resolution sound source.
The design of the cabinet is of course extremely important if the aim is to create a speaker with superior reproduction capabilities. The goal was to reduce standing waves to ensure highest accuracy, as well as to provide a full, three-dimensional sound with an awesome feeling of depth. The solution was to design a cabinet with non-parallel surfaces, having the woofer and midrange sections divided by a slanted partition, and strengthening the entire enclosure with vertical ladder bracing. Another important point is the three-way mitered construction of the cabinet joints, achieved thanks to Yamaha’s excellence in woodworking. This technique ensures extremely tight joints so the entire cabinet behaves as a single unit, providing tight, powerful and accurate bass reproduction.
A diecast aluminum tweeter plate isolates the tweeter from cabinet vibration and provides a solid attachment for the tweeter unit. This prevents incidental movement, helping to ensure that the high range sound is clear and transparent, with no coloration.
The crossover networks employ the highest quality parts, including Solen metalized polypropylene capacitors and large iron-core coils with carefully selected wire. All parts are connected by directly soldering each one individually, instead of using printed circuit boards, further contributing to the rich and vivid sound. Finally, meticulous sound tuning ensures optimum transitions between drivers for smooth and natural sound across the entire frequency range.
The original and beautiful form with no flat surfaces was designed by Toshiyuki Kita, an internationally famous product designer. In addition to its high sound quality due to minimal standing waves, the elegant presence of the speaker displays expressions which vary according to the viewing angle. The real wood veneer with luxurious piano finish presents an elegant appearance for any home theater.
The glossy, lustrous finish is applied using the same techniques developed by Yamaha over many decades of manufacturing beautiful grand pianos. It provides a perfect visual complement to the smooth, rich sound you enjoy from the speakers.