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What cords will I need? Audio connecting cord (supplied) (1) Hookups Connect the MONO OUT jack of your amplifier to the LINE IN jack of the woofer with the supplied audio connecting cord. Amplifier This woofer LINE IN OUT MONO OUT Note If the output level of your amplifier is not large enough, the sound may not be loud enough. In this case, connect the speaker terminals of the amplifier directly to the SPEAKER IN terminals of the woofer. When using two or more subwoofers Amplifier MONO OUT This woofer Another woofer LINE LINE IN OUT IN OUT Connecting the AC power cord • Connect the AC power cord from the woofer and from your amplifier to a wall outlet. • Make sure that power to the woofer is turned off before you plug in or unplug any power cord. 7GB Basic OperationsBasic Operations Basic OperationsBasic Operations Listening to the Sound POWER Note Never set the amplifier’s tone control (BASS, TREBLE, etc.) or the equalizer output to a high level or input sinewaves of 20 Hz to 50 Hz recorded on a commercially- available test disc or special sound (bass sound of electronic musical instrument, pop noise of analog disc turntable, sound with abnormally enhanced bass, etc.) in a high level to this unit. These actions may cause damage to the speakers. When a special disc containing abnormally enhanced bass is played, noise may be output in addition to the original sound. In such a case, decrease the sound level. Note The subwoofer output signal (DOLBY digital (AC-3) signal) of the digital surround processor sold singularly is set 10 dB higher by Dolby laboratories Licensing Corporation. In the case of using normally, adjust the subwoofer level. Note If you turn down the volume level of the woofer too low, the auto power on/off function may activate, causing the woofer to enter power saving mode. 8GB POWER (?/1) POWER indicator 1 1 Turn on the amplifier and select the program source. 2 2 Press POWER (?/1). The woofer turns on and the POWER indicator lights up in green. 3 3 Play the program source. Adjust the VOLUME so that sound from the front speakers is not distorted. If it is distorted, the sound from the woofer will also be distorted. To turn on and off the power automatically — Auto power on/off function When the woofer is on (i.e, the POWER indicator lights up green) and there is no signal input for about seven minutes, the POWER indicator changes to red and the woofer enters power saving mode. While in this mode a signal is input to the woofer, the woofer automatically turns on (auto power on/off function). To turn this feature off, slide the POWER SAVE switch on the rear panel to OFF. AUTO OFF POWER SAVE Basic Operations Basic Operations Adjusting the Sound You can adjust the sound of the woofer to suit the sound of your front speakers. Reinforcing the bass sound gives you a greater sense of atmosphere. LEVEL MIN MAX CUT OFF FREQ 50Hz PHASE 170Hz REVERSENORMAL LEVEL PHASE CUT OFF FREQ Note If the sound distorts when you turn on the bass reinforcement from your amplifier (such as, DBFB, GROOVE, the graphic equalizer, etc.), turn off the bass reinforcement and adjust the sound. 1 1 Adjust the cut-off frequency. Turn the CUT OFF FREQ control, depending on the reproduction frequencies of your front speakers. 100Hz Refer to the following when adjusting. 75Hz 4321120Hz 1 Typical very small sized speakers: 5 – 7 cm dia. 150Hz 2 Typical small sized speakers: 8 –15 cm dia. 3 Typical medium sized speakers: 16 –24 cm dia. 50Hz 170Hz 4 Typical large sized speakers: more than 25 cm dia. To make the most of the low level converter function of Dolby digital, turn the CUT OFF FREQ as high as possible when playing back the Dolby digital (AC-3). Basic Operations Note 2 2 Adjust the volume level of the woofer. Do not turn the volume of the Turn the LEVEL control so that you can hear the bass sound a little woofer to maximum. Doing so may weaken the bass sound. Moreover, more than before. To increase the volume, turn the control clockwise. extraneous noise may be heard. To decrease the volume, turn the control counterclockwise. Note Selecting NORMAL or REVERSE with the PHASE selector reverses the polarity and may provide better bass reproduction in certain listening environments (depending on the type of front speakers, the position of the woofer and the adjustment of the cut-off frequency). It may also change the expanse and tightness of sound, and effect the feeling of the sound field. Select the setting that provides the sound you prefer when listening in your normal listening position. 3 3 Play your favorite song and movie. Male vocal tunes and voice containing bass sounds are most suitable for adjustment. Turn the volume for front speakers to the same level as usual. 4 4 Select the phase polarity. Use the PHASE selector to select the phase polarity. 5 5 Repeat steps 1 to 4 to adjust for your preference. Once you have adjusted the woofer to the settings you desire, use the VOLUME control on the amplifier to adjust the vol...