Summary of the content on the page No. 1
YST-SW120/60
Active Servo Processing Subwoofer System
Built-in 70W Power Amplifier (YST-SW120)
Built-in 50W Power Amplifier (YST-SW60)
2 Way Selectability for Connections
High Frequency Cut-off Point (HIGH CUT) Control
PHASE Switch
Active Servo
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Technology
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Summary of the content on the page No. 2
SAFETY INSTRUCTIONS 1 Read Instructions – All the safety and operating 11 Power-Cord Protection – Power-supply cords should be instructions should be read before the unit is operated. routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying 2 Retain Instructions – The safety and operating instructions particular attention to cords at plugs, convenience should be retained for future reference. receptacles, and the point where they exit from the un
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FCC INFORMATION 1. IMPORTANT NOTICE : DO NOT MODIFY THIS UNIT! Compliance with FCC regulations does not guarantee that interference will not occur in all installations. If this product This product, when installed as indicated in the is found to be the source of interference, which can be instructions contained in this manual, meets FCC determined by turning the unit “OFF” and “ON”, please try requirements. Modifications not expressly approved by to eliminate the problem by using one of the fo
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FEATURES This subwoofer system employs YAMAHA Active Servo This unit can be added easily to your existing audio system • • Technology which YAMAHA developed for reproducing by connecting to either the speaker terminals or the line higher quality super-bass sound. (Refer to page 11 for output (pin jack) terminals of the amplifier. details on Active Servo Technology.) For the effective use of this unit, this unit’s super-bass • This unit does not only enhance bass frequency response sound must
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CONNECTIONS • Before attempting to make any connections to or from this unit, be sure to first switch OFF the power to this unit and to any other components to which connections are being made. • When making connections between this unit and other components, be sure all connections are made correctly and consistently, that is to say L (left) to L, R (right) to R, “+” to “+” and “–” to “–”. • This unit can be connected to either the speaker terminals or the line output (pin jack) terminals of th
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If your amplifier has two sets of speaker terminals Right speaker OUTPUT INPUT2 PHASE Left speaker This unit TO SPEAKERS OUTPUT INPUT2 PHASE TO SPEAKERS NOM REV FROM AMPLIFIER INPUT1 NOM REV FROM AMPLIFIER INPUT1 To AC outlet Amplifier AB (Both “ A”and “ B” outputs must be ON.) Connecting to this unit’s OUTPUT/INPUT terminals For connections, cut the speaker wires as short as possible. If * Banana Plug connections are also possible (except for the connections are faulty, no sound will be heard
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CONNECTING TO LINE OUTPUT (PIN JACK) TERMINALS OF THE AMPLIFIER • Leave the main speakers connected to the amplifier. • Amplifier line output terminals are generally labeled PRE OUT or SUBWOOFER OUT. * For PRE OUT terminal connection, the amplifier must possess at least two sets of PRE OUT terminals. With some amplifiers with only one set of PRE OUT terminals, connection can result in no sound from the main left and right speakers. In this case, select the method of connecting to the speaker t
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CONTROLS AND THEIR FUNCTIONS Front panel YST-SW120 YST-SW60 YST-SW120 YST-SW60 1 1 POWER HIGH CUT VOLUME 40 Hz 140 Hz010 POWER HIGH CUT VOLUME POWER HIGH CUT VOLUME 40 Hz 140 Hz 010 50 Hz 200 Hz 010 2 3 4 23 4 Rear panel OUTPUT INPUT2 PHASE TO SPEAKERS OUTPUT INPUT2 PHASE NOM REV FROM AMPLIFIER INPUT1 TO SPEAKERS NOM REV FROM AMPLIFIER INPUT1 5 1 POWER indicator 4 VOLUME control Illuminates when the POWER switch is turned ON, and Adjusts the volume level. goes off when turned OFF. 5 PHASE swit
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ADJUSTING VOLUME Front panel YST-SW120 YST-SW60 POWER HIGH CUT VOLUME POWER HIGH CUT VOLUME 40 Hz 140 Hz 010 50 Hz 200 Hz 010 2 5 1, 4 2 5 1, 4 Rear panel OUTPUT INPUT2 PHASE TO SPEAKERS NOM REV FROM AMPLIFIER INPUT1 6 Notes 1 Set the VOLUME control to minimum. Once the volume balance between this unit and the main • speakers is adjusted, you can adjust the volume of your 2 Turn on the power supply to all the components. whole sound system by using only the amplifier’s vo
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FREQUENCY CHARACTERISTICS Adjustment of the VOLUME control, the HIGH CUT control and the PHASE switch should be changed according to the main speakers, listening condition, source, etc. Following figures show the optimum adjustment of each control and the frequency characteristics when this unit is combined with a typical speaker system. YST-SW60 YST-SW120 This unit’s frequency characteristics dB dB HIGH CUT 40 Hz HIGH CUT 120 Hz HIGH CUT 90 Hz 90 90 HIGH CUT 200 Hz HIGH CUT 140 Hz 80 80 70 70 6
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ACTIVE SERVO TECHNOLOGY The theory of Active Servo Technology is based upon two Thus it is this problem that is resolved through the major factors, the Helmholtz resonator and negative- employment of a design in which the amplifier functions to impedance drive. Active Servo Processing speakers supply special signals. If the electrical resistance of the voice reproduce the bass frequencies through an “air woofer”, coil could be reduced to zero, the movement of the speaker which is a port or ope
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TROUBLESHOOTING If the unit fails to operate normally, check the following points to determine whether the fault can be corrected by the simple measures suggested. If it cannot be corrected, or if the fault is not listed in the SYMPTOM column, disconnect the power cord and contact your authorized YAMAHA dealer or service center for help. SYMPTOM CAUSE REMEDY Power is not supplied even though the The power plug is not securely connected. Connect it securely. POWER switch is ON. No sound . The VO
