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manual abstract
( : subwoofer, : front speaker) Connections Caution: Plug the power cables for the sub- woofer and other audio/video components into an AC outlet only after you complete all other connections. Basic connection example Connect a subwoofer cable to the output jack of your AV amplifier and to the INPUT jack of the subwoofer. Amplifier (The rear panel of various amplifiers may differ in appearance.) OFF ON POWER VOLUMEINPUT INPUT To AC outlet Subwoofer Connecting components and the subwoofer to AC power After you complete a subwoofer connection, plug the amplifier, other audio/video component, and the subwoofer into an AC outlet of appropriate voltage. VOLTAGE SELECTOR (For China, Korea, Asia and General models) The voltage selector switch on the rear panel of this unit must be set for your local main voltage BEFORE plugging this unit into the AC main supply. Voltages are 110–120/220–240 V AC, 50/ 60 Hz. English 3 Using the subwoofer OFF ON POWER VOLUMEINPUT 3 1 4 2 INPUT VOLUME OFF ON POWER Rear panel 1Power indicator Lights up GREEN when the POWER switch (2) is turned ON; turns off when the POWER switch is turned OFF. 2POWER switch Press this switch to the ON position to turn on the power to the subwoofer. When the power of the subwoofer is on, the power indicator (1) on the rear panel lights up green. Press this switch again to set it to the OFF position to turn off the power of the subwoofer. 3VOLUME control Adjusts the volume level. Turn the control clockwise to increase the volume, and counterclockwise to decrease the volume. 4INPUT terminal Input terminal for line level signals from the amplifier. Pre-adjusting the subwoofer volume Before you use the subwoofer, first adjust the volume balance between the subwoofer and the front speakers by following the procedure below. 1.Set the VOLUME control to minimum (0). 2.Turn on the power to all other components. 3.Press the POWER switch to the ON position. The power indicator on the rear panel lights up green. 4.Play a source that contains low-frequency sounds. Adjust the amplifier’s volume control to the desired listening level. 5.Increase the volume gradually to adjust the volume balance between the subwoofer and the front speakers. To enjoy natural bass sound, keep the subwoofer volume at a level where it is barely distinguishable from other speakers. 6.Adjust the volume of the entire sound system using the amplifier’s volume control. Note: It is recommended that you set the VOLUME control about in the middle position when using the subwoofer in a multi channel home theater system. VOLUME English Englishy The theory behind Yamaha Active Servo Technology is based on two 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 Helmholtz resonance theory, be output from this opening as waves of great amplitude if the size of the opening and the volume of the cabinet are in 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 in the cabinet. This problem is resolved by a 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, the system utilizes a special negative- impedance output-drive amplifier that subtracts the output impedance of the amplifier. 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 featuring a Helmholtz resonator, reproduce an extremely wide range of frequencies with outstanding sound quality and low distortion. The features described above combine to create the fundamental structure of conventional Yamaha Active Servo Technology. Our new Active Servo Technology — Advanced Yamaha Active Servo Technology — adopts Advanced Negative Impedance Converter (ANIC) circuits, which allow the conventional negative impedance converter to dynamically vary to select an optimum value for speaker impedance variation. With these new ANIC circuits, Advanced Yamaha Active Servo Technology provides a more stable performance and improved sound pressure compared to conventional Yamaha Active Servo Technology, resulting in more natural and dynamic bass reproduction. High-amplitude bass sound Cab...