YST-SW515 Subwoofer

Yamaha’s YST-SW515B subwoofer combines 270W of power with advanced technology to provide top-class sound quality, making it an ideal match for your speakers.

QD-Bass Technology

QD-Bass (Quatre Dispersion Bass) technology uses down-firing drivers with square, pyramid-shaped reflective plates to radiate the sound efficiently in four horizontal directions. The reflective plates (not used in competitors’ down-firing subwoofers) negate any effects caused by the floor surface and reduce resonance between sound waves reflected from the floor and the unit. Unlike most other systems, QD-Bass reduces turbulence by radiating in four directions to avoid reflection from the legs of the cabinet. This means that the YST-SW515B generates extraordinary power and smooth frequency response from an extremely compact unit and allows greater freedom of placement, because the sound radiates with equal effectiveness in all directions.

Advanced YST II for awesome bass

Yamaha's newly developed Advanced YSTII (Yamaha Active Servo Technology II) combines negative impedance and constant-current principles to drive the speaker cone with even tighter control than in previous models. 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 pressure levels, for more natural and energetic bass reproduction.

PWM Digital Drive high efficiency amplifier

The YST-SW515B delivers high power outputs at deep bass levels, with excellent stability and low power consumption, even with its compact cabinet. This is made possible by a highly efficient power amplifier. The amplifier achieves superior conversion efficiency by supplying maximum power from the power transistors according to the output level. It delivers stable power output with high efficiency while minimising power consumption and heat production. It does not require an output filter coil, resulting in extremely low noise and distortion. High speed transient response is also excellent.

New linear port

The linear port provides smooth bass response during playback and minimises extraneous noise.

BASS

The BASS (Bass Action Selector System) function lets you switch between Movie and Music modes, providing the optimum frequency response in each case.

Environmentally friendly

The internal parts and circuit boards of the YST-SW515B do not contain lead, which is often used in other subwoofer brands, and is harmful to the environment. It also has a low-power standby mode, in which power consumption is only 0.5W.

Other notable features: