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manual abstract
Normally, set the control to the main speaker’s rated minimum reproducible frequency*. * The main speaker’s rated minimum reproducible frequency can be looked up in the speakers’ catalog or owner’s manual. 6 Increase the volume gradually to adjust the volume balance between the subwoofer and the main speakers. Normally, set the control to the level where you can obtain a little more bass effect than when the subwoofer is not used. If the desired response cannot be obtained, adjust the HIGH CUT control and the VOLUME control again. 7 Press the PHASE button to select the regular or reverse mode which gives you the better bass sound. Normally, select the reverse mode (so that the PHASE indicator on the front panel lights up in green). If the desired response cannot be obtained, select the regular mode (so that the PHASE indicator lights up in red). 8 Select “MOVIE” or “MUSIC” according to the played source. MOVIE (when the MUSIC/MOVIE indicator on the front panel lights up in green): When a movie type source is played, the low-frequency effects are enhanced to allow the listener enjoy more powerful sound. (The sound will be thicker and deeper.) MUSIC (when the MUSIC/MOVIE indicator on the front panel lights up in red): When an ordinary music source is played, the excessive low-frequency components are cut off to make the sound clearer. (The sound will be lighter and reproduces the melody line more clearly.) • 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 the amplifier’s volume control. However, if you change the main speakers to others, you must make this adjustment again. • For adjusting the VOLUME control, the HIGH CUT control and the PHASE button, refer to “Frequency characteristics” on page 17. E-15 Storing preset data of the VOLUME control etc. Storing preset data of the VOLUME control etc. can recall any preset data easily according to the source. 2 3 SUBWOOFER SYSTEM YST-SW1500 MUSIC/MOVIE PHASE VOLUMEHIGH CUTB.A.S.S.STANDBY/ON 1 1014Hz40Hz 0 PRESET 2 3 SUBWOOFER SYSTEM YST-SW1500 MUSIC/MOVIE PHASE VOLUMEHIGH CUTB.A.S.S.STANDBY/ON 1 10140Hz40Hz 0 PRESET 2 3 1 3 To store 1 Adjust the VOLUME control, the HIGH CUT * The default setting of each PRESET button is suitable for control, the PHASE button and the B.A.S.S. using the following Yamaha speaker system with this subwoofer. switch. PRESET 1: NS-8HX, NS-6HX 2 Press the MEMORY button. The PRESET PRESET 2: NS-4HX number indicators on the front panel flash. PRESET 3: NS-2HX 3 Press the PRESET 1 button. The corresponding PRESET number indicator illuminates. This shows that the data has been stored in PRESET 1. * In the same way, store other sets of data in PRESET 2 and 3. Notes . A new setting can be stored in place of the former one. . While the VOLUME control or the HIGH CUT control is rotating from a PRESET button having been pressed, pressing another PRESET button is ineffective. Memory back-up The memory back-up circuit prevents the stored data from being lost even if the POWER switch is set off or the power plug is disconnected from the AC outlet or the power is cut due to temporary power failure. If, however, the power is lost for more than one week, the memory may be erased. If so, it can be re-stored by simply following the steps described above. English English This subwoofer’s frequency characteristics 20 50 100 200 500 Hz 40 50 60 70 80 90 100 dB HIGH CUT 40 Hz HIGH CUT 90 Hz HIGH CUT 140 Hz The figures below show the optimum adjustment of each control and the frequency characteristics when this subwoofer is combined with a typical main speaker system. EX.1 When combined with a 4” or 5” (10 cm or 13 cm) acoustic suspension, 2 way system main speakers 100 dB HIGH CUT VOLUME 90 80 40Hz 140Hz 0 10 70 PHASE–Set to the reverse mode. 60 B.A.S.S.–MOVIE 50 40 Main speaker’s response YST-SW1500 20 50 100 200 500 Hz EX.2 When combined with an 8” or 10” (20 cm or 25 cm) acoustic suspension, 2 way system main speakers 100 dB HIGH CUT VOLUME 90 80 40Hz 140Hz 0 10 70 PHASE–Set to the reverse 60 mode. B.A.S.S.–MOVIE 50 40 Main speaker’s response YST-SW1500 20 50 100 200 500 Hz 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 preci...