Subwoofer SOAVO NS-SW901 Piano
Powerful and attractive subwoofer with surprisingly deep bass

Powerful and attractive subwoofer with surprisingly deep bass
Yamaha's Advanced YST II (Yamaha Active Servo Technology II) uses a negative impedance and constant current mechanism to control the speaker more efficiently. Using an Advanced Negative Impedance Converter (ANIC) circuit, this system dynamically optimizes the speaker impedance for better linearity. This means more stable and accurate bass response, not to mention higher sound pressure.
The NS-SW901 subwoofer reproduces authentic bass with a built-in 600W digital amplifier. The design uses the proprietary Power Engine chipset, constant gain PLL circuit, crossover feedback loop, Active Power Control system, high efficiency power supply and the highest quality components. Despite its compact size, it delivers exceptionally high power and high sound quality while consuming very little power. The 25cm cone is made from Yamaha's own FBP material, which is a paper blended with carbon and aramid fibers. Thanks to its exceptional rigidity and extra-long stroke, even very powerful low-frequency explosive sounds are reproduced without distortion.
The phase inverters are cut from a single piece of alder wood and aesthetically match the cabinet design. Two phase inverters allow you to increase the total area of the hole without increasing the size of the cabinet.
The shape of the bass reflex is designed based on the natural logarithm to prevent air noise.
The NS-SW901 uses three-way gusset panels to increase strength and solidify the body. This helps improve bass response and reduce unwanted vibration. The thick (37 mm) acoustic baffle also helps reduce vibration, contributing to the rigidity of the structure.
The lustrous glossy finish is crafted using techniques developed over decades of producing excellent Yamaha grand pianos.
The BASS (Bass Action Selector System) function allows you to select from three modes to optimally match the characteristics of the subwoofer to the character of the reproduced sound. Wide - For powerful sound effects in movies. Normal for natural-sounding music and speech in movies, and Narrow for suppressing unwanted low frequencies in music for a cleaner sound.
The remote control is used to conveniently control the subwoofer. It allows you to turn the power on/off, adjust the volume, low-pass cut, phase (normal/reverse), select BASS modes, start the auto-off timer, and select stored settings.
It is possible to store in memory three combinations of settings (volume, BASS mode, LPF and phase settings) with their subsequent call by pressing the button on the remote control.
If you activate the off timer, the power will turn off automatically after two hours. This useful feature helps save power, as users often forget to turn off the subwoofer.
Other distinctive features:
• Continuously adjustable low pass filter (40 - 140 Hz)
• LFE connector (LPF bypass)
• Ability to turn on / off with the remote control of the receiver / amplifier Yamaha
• Motorized volume control controlled by remote control
• Low standby power consumption - 0.5 W
• Gold-plated connectors
• Frequency response: 18 - 160 Hz
• Robust and heavy construction: 32 kg
Speaker: Cone FBP 25cm
Output power: 600W
Frequency response: 18-160 Hz
Advanced YST Technology: Yes
High Efficiency Power Amplifier: Yes
Line Port: Yes
BASS (Bass Action Selector System): Yes
Power consumption in standby mode: 0.5 W
Dimensions (WxHxD): 410 x 457 x 462 mm
Weight: 32 kg
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