Yamaha NS-SW1000

The cabinet employs a massive 19kg high strength, heavy bass reflex enclosure constructed of thick 36mm MDF (medium-density fiberboard) on the baffle sides and 25mm MDF on the other sides with traditional three-way mitered-joint construction. It has a strong resonance-resisting structure with cast-iron legs and a front-firing design with the woofer unit attached to the front of the enclosure. It delivers direct, razor-sharp sound that’s ideal for high-end audio systems.

The all-new Twisted Flare Port takes advantage of extensive subwoofer development experience. The flared, gently twisting shape diffuses the vortex of air generated around the edge of the port, creating a smooth flow of air. This reduces extraneous noise not present in the original input signal and provides clear, accurate low frequency reproduction. From special effect sounds in movies to the atmosphere of a live venue, you hear bass that is clear, tight and realistic.

The 1000W output power digital amplifier employs a drive stage using the all-new Yamaha digital amplifier IC and a high current MOS-FET discrete push-pull output stage. Careful sound quality tuning included the use of a luxurious triple-wound Litz wire high-capacity output coil and capacitors especially designed for audio, resulting in optimum high quality and high power, for use in theater or HiFi environments.

The huge power supply for the built-in power amplifier has a massive 10.2kg high capacity power transformer and two large 160V 4,700μF block electrolytic capacitors, making it capable of sustaining the 1000W power output. Yamaha used a conventional pure analog power supply to achieve superior response and musicality in the very low bass range.

Developed by Yamaha, the Advanced YST II (Yamaha Active Servo Technology II) combines negative-impedance and constant-current principles to drive the speaker cone with even tighter control than the previous version. Using Advanced Negative Impedance Converter (ANIC) circuits, this system dynamically optimises effective speaker impedance to maintain excellent linearity. This means more stable and accurate low range response, not to mention higher sound quality.

To achieve long-stroke drive with its superior linearity, the NS-SW1000 uses a 30cm (12”) woofer unit with a strong, flexible drive system employing double layer large diameter ferrite magnets and a double damper with an air vent. The frame is high strength aluminium diecast to suppress unwanted resonance even at high volumes, making it possible to reproduce delicate tonal nuances.

The specially designed woofer diaphragm is semi-pressed paper incorporating Kevlar fibers for high strength and optimal internal losses. It was developed for this model in pursuit of the ideal characteristics for a subwoofer.

On the rear panel a phase switchover selector is provided that selects either normal or reverse woofer output phase. You can set the best phase according to your listening environment while doing comparative listening tests.