Subwoofer Yamaha NS-SW200 Pianoblack

Active subwoofer with Twisted Flare Port technology and a PWM digital amplifier

The Yamaha NS-SW200 is an active subwoofer designed to extend the bass range of both stereo and home cinema systems, built around a 20 cm cone woofer and a PWM digital amplifier rated at 130 W. The key design element is the Twisted Flare Port, a shaped bass reflex port that works with the airflow at its outlet and contributes to cleaner, more accurate low frequencies. The 28–200 Hz frequency range allows it to be matched with a wide variety of loudspeakers.

The digital power stage operates with high efficiency, reducing power consumption and heat losses, and requires no output choke — the result is a low level of noise and distortion together with fast transient response. This is complemented by a dual feedback circuit, which applies feedback twice and further reduces distortion. Cone control is handled by Advanced YST II with ANIC (Advanced Negative Impedance Converter) circuitry, combining the negative impedance and constant current principles; the system dynamically optimises the driver's effective impedance and maintains linear response.

The gently twisted port shaping disperses the air vortex forming at its edge and creates smoother airflow. This suppresses sounds that are not part of the input signal, so the bass comes across as more defined and better controlled — whether it is film effects or the atmosphere of a live concert recording. Stable cone control translates into a more precise attack of each note and a more intelligible bottom octave.

The controls are placed on a front panel angled at 45°, so power and volume remain accessible even when the unit is placed on the floor; an LED indicator above the power button shows the status even in a darkened room. A system connector allows linking with the amplifier's power supply, and the Auto Standby function with selectable sensitivity switches the unit to standby when no signal is present (0.3 W consumption). A phase switch (normal / reverse) is also provided. The rounded front section and side panels are available in several colour finishes.

Key features

• Driver: 20 cm cone woofer, 28–200 Hz range
• Amplifier: 130 W PWM digital stage with dual feedback
• Port: Twisted Flare Port for smooth airflow
• Cone control: Advanced YST II with ANIC circuitry
• Operation: Auto Standby, system connector, 0.3 W consumption