Assessments - 2, GPA: 4
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Facilidade de uso
terminals on the rear panel of the subwoofer. If connected, they will not produce sound. USING THE SUBWOOFER (SW-P40) CONTROLS AND THEIR FUNCTIONS Rear panel Side panel OUTPUT TO SPEAKERS INPUT1 FROM AMPLIFIER INPUT2 ON OFF AUTO POWER 1234POWER VOLUME 0 I0 HIGH CUT 50Hz I50Hz 5678 1 OUTPUT (TO SPEAKERS) terminals Can be used for connections with the main speakers. These terminals send signals output from the amplifier to the main speakers directly. 2 INPUT1 (FROM AMPLIFIER) terminals Used to connect this unit with the speaker terminals of the amplifier. 3 INPUT2 terminals Used to input line level signals from the amplifier. 4 AUTO POWER ON/OFF switch By setting this switch to the ON position, this unit’s automatic power ON/OFF function operates as described below. If you do not need this function, set to the OFF position. * Make sure to change the setting of this switch only when this unit is in the standby mode. 5 POWER indicator Lights in green when the POWER switch is turned on, and goes off when turned into the standby mode. * Standby mode If the AUTO POWER ON/OFF switch on the rear panel is set to ON, this indicator lights in red when no signal is input to this unit. 6 POWER switch Turns the power to this unit on and turns this unit into the standby mode alternately whenever pressed. When this switch is turned on, the POWER indicator over the POWER switch lights up. 7 VOLUME control Adjusts the volume level. 8 HIGH CUT control Adjusts the high frequency cut off point. Frequencies higher than the frequency selected by this control are all cut off (and not output). * One graduation of this control represents 10 Hz. 100 110 90 80 120 70 130 60 140 50Hz I50Hz Automatic power ON/OFF function When you play a source, the power to this unit turns on automatically by sensing audio signals input to this unit. This unit turns into the standby mode automatically if the source being played is stopped or the input signal is cut off for several minutes. This function will operate responding to a certain level of low frequency input signal. Increase the output level on the input source if the automatic power ON function will not operate, or decrease the level if the automatic power OFF function will not operate. * There may be a case that the power turns on unexpectedly by sensing noise from other appliances. If it occurs, set the AUTO POWER ON/OFF switch to the OFF position. * The level of low frequency input signal differs with each source, and each different part on the same source. So, this function may not operate properly depending on some source. This function is available only when the power of this unit is on (by setting the POWER switch (6) to “on”). English ADJUSTMENT BEFORE USING THE SUBWOOFER Before using the subwoofer, make an adjustment on the subwoofer to obtain the optimum volume and tone balance between the subwoofer and the main speakers by following the procedures shown below. Side panel POWER VOLUME 0 I0 HIGH CUT 50Hz I50Hz 1, 4 5 1 Set the VOLUME control to minimum. 2 Turn on the power supply to all the components. 3 Play any source and adjust the amplifier’s volume control to the desired listening level. 4 Turn up the VOLUME control gradually to adjust the volume balance between this unit and the main speakers. 5 If you prefer, set the HIGH CUT control to the position where you can obtain the optimum tone balance between the subwoofer and the main speakers. Notes • Once the volume balance between the subwoofer and the main speakers is adjusted, you can adjust the volume of your whole sound system by using only the amplifier’s volume control. However, if you change the main speakers NS-M40 to others, you must make this adjustment again. • For adjusting the VOLUME control and the HIGH CUT control, refer to “FREQUENCY CHARACTERISTICS” on the next page. Note about setting the HIGH CUT control This system is designed so that the optimum tone balance between the subwoofer and the main speakers is obtained when this control is set at the point of 80 Hz. However, the tone balance may change depending on the room size, the distance from the subwoofer to the main speakers, and so on. So, if you prefer, turn the HIGH CUT control to set it to a position where a better tone balance is obtained. n FREQUENCY CHARACTERISTICS Adjustment of the VOLUME control and the HIGH CUT control should be changed depending on the room size, the distance from the subwoofer to the main speakers, sources, etc. Following figures show the optimum adjustment of each control and the frequency characteristics when this subwoofer is combined with NS-M40. Frequency characteristics of this subwoofer (SW-P40) • When combined with NS-M40 VOLUME 0 I0 HIGH CUT 50Hz I50Hz 20 50 100 200 500Hz 40 50 60 70 80 90 dB HIGH CUT 50 Hz HIGH CUT 100 Hz HIGH CUT 150 Hz 20 50 100 200 500Hz 40 50 60 70 80 90 dB NS-M40 SW-P40 English ACTIVE SERVO TECHNOLOGY The theory of Active Servo Technology is based upon two major factors, the Helmholtz resonator and...