• PWM digital drive high efficiency amplifier and dual feedback circuit.
• New Twisted Flare Port contributes to clear and tight bass, 20 to 160 Hz Frequency response.
• Advance YST II (Yamaha Active Servo Technology II) with 250 W output power.
• 10 inch woofer with square wire voice coil.
• Front control panel for easy control, auto standby switch / sensitivity selector (high, low and off) and system control.

Product Description ------------------- A design combining superior operation and beauty. Introducing Yamaha's new technology, Twisted Flare Port, for clear and tight bass. A subwoofer with a beautiful piano black finish and gentle curved front. From the Manufacturer --------------------- NS-SW300 – Subwoofer with Twisted Flare Port -------------------------------------------- * Key Features ------------ * PWM digital drive high efficiency amplifier and dual feedback circuit * New Twisted Flare Port contributes to clear and tight bass * Advanced YST II (Yamaha Active Servo Technology II) * 10" woofer with square wire voice coil * Beautiful design will match a wide range of speakers and interiors * Front control panel for easy control * System control and Auto Power Standby Completely and Beautifully Evolved Subwoofer -------------------------------------------- With a gentle curve in front and piano black finish, the NS-SW300 subwoofer has a sophisticated appearance. The NS-SW300 delivers outstanding bass response due in part to Yamaha’s new Twisted Flared Port technology. New Twisted Flare Port Produces Clear and Tight Bass ---------------------------------------------------- The all-new Twisted Flare Port takes advantage of extensive subwoofer development experience. Compared to a conventional port, the Twisted Flare Port reduces air turbulence noise, contributing to clear and accurate low frequency reproduction. The flared and gently twisted shape evenly diffuses the air flow through the port. From special effect sounds in movies to the atmosphere of a live venue, you hear bass that is clear, tight and realistic. Click here for a larger image ( https://images-na.ssl-images-.com/images/G/01/electronics/detail-page/Yamaha_PWM_Digital_Drive.jpg ) PWM Digital Drive High Efficiency Amplifier and Dual Feedback Circuit ----------------------------------------------------------------- The built-in power amplifier delivers stable power output of 250 W with high efficiency while minimizing 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. The dual feedback circuit reduces distortion by applying feedback twice, resulting in higher sound clarity. Click here for a larger image ( https://images-na.ssl-images-.com/images/G/01/electronics/detail-page/Yamaha_Advanced_YST.jpg ) Advanced YST II for Awesome Deep Bass ------------------------------------- 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 optimizes effective speaker impedance to maintain excellent linearity. This means more stable and accurate low range response, not to mention higher sound quality. 10" Cone Woofer Unit with Square Wire ------------------------------------- A 10" large woofer unit is used in a front-firing configuration. The voice coil of the driver unit employs square wire with a wide surface area that can be wound more densely to obtain higher magnetic flux density. It delivers high drive force, permitting tight and deep bass reproduction. Beautiful Design that Will Match a Wide Range of Speakers and Interiors ----------------------------------------------------------------- In addition to the beautifully round shape of the front surface, panels on both sides to create an accent and a neat appearance, this subwoofer lets you imagine the strength of sound and matches a wide range of speaker systems. Front Control Panel for Easy Operation -------------------------------------- The power and volume buttons, which are used most often, are laid out on the front surface of the unit for ease of access. It is inclined at an angle of 45°, making it easy to use even when placed on the floor. An LED indicator is above the power button, so even in a dimly lit room it's easy to tell if it's on or off. System Control and Auto Power Standby ------------------------------------- The system control terminal can be linked to the amplifier power to automatically turn the power on and off. There is also an Auto Power Standby function, if no signal is input from the amplifier for a fixed period, it automatically switches to the standby state and when a signal from the amplifier is detected, power turns on automatically. This limits the wasteful consumption of electricity. Other Notable Features ---------------------- * Low standby power consumption of 0.3 W * Auto Power Standby switch / Sensitivity selector (high, low and off) * Phase control (normal or reverse) * B.A.S.S. (Bass Action Selector System) switch Which Yamaha Subwoofers is Right for You? ----------------------------------------- Yamaha YST-SW012BL ------------------ Check out the Yamaha YST-SW012BL ( http://www..com/dp/B000TQ4D8K ) Yamaha YST-SW216BL ------------------ Check out the Yamaha YST-SW216BL ( http://www..com/dp/B000FJ89UO ) Yamaha YST-FSW050BL ------------------- Check out the Yamaha YST-FSW050BL ( http://www..com/dp/B003DO5W12 ) Yamaha NS-SW200PN ----------------- Check out the Yamaha NS-SW200PN ( http://www..com/dp/B00FRET3RA ) Yamaha NS-SW300PN ----------------- Check out the Yamaha NS-SW300PN ( http://www..com/dp/B00FRET3IY ) Amplifier --------- Advanced YST II Advanced YST II Advanced YST II Advanced YST II, PWM digital amplifier, Dual feedback circuit Advanced YST II, PWM digital amplifier, Dual feedback circuit Dynamic Power ------------- 100 W 100 W 100 W 130 W 250 W Frequency Response ------------------ 28-200 Hz 25-180 Hz 35-160 Hz 28-200 Hz 20-160 Hz Multi-range Driver ------------------ 8" cone 10" cone 6.5" cone 8" cone 10" cone with square wire Magnetic Shielding ------------------ Yes Yes Yes Yes Yes Bass Technology --------------- Front firing Front firing Down firing Front firing Front firing Port ---- Linear Linear Linear Twisted Flare Port Twisted Flare Port Design Structure ---------------- High density MDF cabinet High density MDF cabinet Slim design to match flat TV's Piano black with curved front Piano black with curved front Control ------- Rear volume control Selectable high-cut filter Front panel control and auto standby Front panel control and auto standby Front panel control and auto standby Dimensions ---------- 11-3/8" x 11-3/8" x 12-7/8" 13-3/8" x 13-3/8" x 15-3/16" 13-3/4" x 6-7/16" x 13-3/4" 11-3/8" x 12" x 13-7/8" 13-3/4" x 14-3/8" x 16-1/2" Weight ------ 18.74 lbs. 28.7 lbs. 18.7 lbs. 24.7 lbs. 39.7 lbs.