Yamaha YST-SW005 owner manual Advanced Yamaha Active Servo Technology

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ADVANCED YAMAHA ACTIVE SERVO TECHNOLOGY

The theory of Yamaha Active Servo Technology has been based upon two major factors, the Helmholtz resonator and negative-impedance drive. Active Servo Processing speakers reproduce the bass frequencies through an “air woofer”, which is a port or opening in the speaker’s cabinet. This opening is used instead of, and performs the functions of, a woofer in a conventionally designed speaker system. Thus, signals of low amplitude within the cabinet can, according to the Helmholtz resonance theory, be outputted from this opening as waves of great amplitude if the size of the opening and the volume of the cabinet are in the correct proportion to satisfy a certain ratio.

In order to accomplish this, moreover, the amplitudes within the cabinet must be both precise and of sufficient power because these amplitudes must overcome the “load” presented by the air that exists within the cabinet.

Thus it is this problem that is resolved through the employment of a new design in which the amplifier supplies special signals. If the electrical resistance of the voice coil could be reduced to zero, the movement of the speaker unit would become linear with respect to signal voltage. To accomplish this, a special negative-impedance output-drive amplifier for subtracting output impedance of the amplifier is used.

By employing negative-impedance drive circuits, the amplifier is able to generate precise, low-amplitude, low- frequency waves with superior damping characteristics. These waves are then radiated from the cabinet opening as high-amplitude signals. The system can, therefore, by employing the negative-impedance output drive amplifier and a speaker cabinet with the Helmholtz resonator, reproduce an extremely wide range of frequencies with amazing sound quality and less distortion.

The features described above, then, are combined to be the fundamental structure of the conventional Yamaha Active Servo Technology.

Our new Active Servo Technology — Advanced Yamaha Active Servo Technology — adopted Advanced Negative Impedance Converter (ANIC) circuits, which allows the conventional negative impedance converter to dynamically vary in order to select an optimum value for speaker impedance variation. With this new ANIC circuits, Advanced Yamaha Active Servo Technology can provide more stable performance and improved sound pressure compared with the conventional Yamaha Active Servo Technology, resulting in more natural and dynamic bass reproduction.

High-amplitude bass sound

Cabinet

Port

Advanced Negative-

impedance Converter

Active Servo

Processing

Amplifier

Air woofer (Helmholtz resonator)

Signals

Signals of low amplitude

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Contents YST-SW005 Important Safety Instructions We Want You Listening For a Lifetime Unpacking For U.K. customers For Canadian CustomersFeatures ContentsPlacement Use the nonskid pads Using one subwoofer Connections Using two subwoofers Connecting to speaker output terminals of the amplifier Connecting to the INPUT1/OUTPUT terminals of the subwoofer How to ConnectControls and Their Functions Automatic POWER-SWITCHING Function Adjusting the Subwoofer Before USE Speaker’s MainResponse Advanced Yamaha Active Servo Technology Troubleshooting Specifications Power SupplyAmplifier Output China and General modelsV848090

YST-SW005 specifications

The Yamaha YST-SW005 is a compact yet powerful subwoofer designed to enhance your audio experience, particularly in home theater setups and music listening environments. With a sleek design and advanced features, the YST-SW005 delivers deep, impactful bass that adds richness to soundtracks and music alike.

One of the major features of the YST-SW005 is its 8-inch cone woofer, which is adept at producing crisp lows and well-defined bass tones. The woofer is built with a high-quality composition that ensures durability and exceptional performance. This subwoofer is capable of delivering a frequency response range of 20 Hz to 150 Hz, enabling it to reproduce the deepest bass notes that many standard speakers cannot handle.

The Yamaha YST technology employed in this subwoofer is innovative and sets it apart from competitors. YST stands for Yamaha Active Servo Technology, which actively monitors and controls the motion of the woofer cone. This technology enhances dynamic range and low-frequency reproduction, ensuring that the sound is both powerful and precise, resulting in a richer audio experience.

The YST-SW005 also features a built-in 50-watt RMS amplifier, which provides ample power to enhance performance without distortion. A variable low-pass crossover control allows users to adjust the frequency range, enabling seamless integration with other speakers in a multi-channel audio setup. This flexibility in settings makes it easy to tailor the sound to fit various room acoustics and personal preferences.

Additionally, the subwoofer is fitted with both line-level and speaker-level inputs, providing versatility in connectivity. This means it can easily connect to a wide range of audio systems, whether using an AV receiver or directly connecting to speakers, ensuring compatibility with most home theater setups.

The cabinet design of the YST-SW005 is acoustically optimized, reducing unwanted vibrations and interference to maximize sound clarity. Its stylish appearance, available in a classic black finish, allows it to fit seamlessly into any living space without being an eyesore.

In conclusion, the Yamaha YST-SW005 subwoofer is an excellent choice for those seeking to enhance their audio experience with deep and powerful bass. With its innovative YST technology, solid construction, and versatile connectivity options, it stands out as a reliable addition to any sound system, providing a satisfying listening experience for music lovers and movie enthusiasts alike.
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