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BDS
7
PL0004-01001
ENGLISH
Subwoofer Controls and Connections
Phase Switch: This switch determines whether the subwoofer driver’s piston-like action
moves in and out in phase with the satellite speakers. If the subwoofer were to play out of
phase with the satellite speakers, the sound waves produced by the subwoofer could be
cancelled out, reducing bass performance and sonic impact. This phenomenon depends in
part on the relative placement of all the speakers in the room.
Although in most cases the Phase switch should be left in the “Normal” position, there is no
absolutely correct setting for it. When the subwoofer is properly in phase with the satellite
speakers, the sound will be clearer and have maximum impact. It will make percussive
sounds like drums, piano and plucked strings sound more lifelike. The best way to set the
Phase switch is to listen to music that you are familiar with and set the switch in the position
that gives drums and other percussive sounds maximum impact.
Bass-Boost Switch: Set this switch to “On” to enhance the subwoofer’s low-frequency
performance. Set this switch to “Off” for normal low-frequency performance.
Power-On Mode Switch: When this switch is set in the “Auto” position and when the
Power switch is set to “On,” the subwoofer will automatically turn itself on when it receives
an audio signal. It will enter the Standby mode if it receives no audio signal for 20 minutes.
When the Power-On Mode switch is set in the “On” position, the subwoofer will remain on
whether or not it is receiving an audio signal.
An LED on the subwoofer’s top panel indicates whether the subwoofer is in the On or Standby
mode:
When the LED glows
t
white, the subwoofer is turned on.
When the LED is not lit up, the subwoofer is in Standby mode.
t
When the Main Power Switch is set to Off, the LED will not light up, no matter what setting
the Power-On Mode switch is in.
Subwoofer Level Control: Use this control to adjust the subwoofer’s volume. Turn
clockwise to increase the volume; turn counterclockwise to decrease the volume.
External Trigger Input Connector: NOTE: This connector is NOT used with the
BDS receiver. If you connect the subwoofer to a different component that has a voltage
trigger output connection, connect the External Trigger Input to the trigger output of the
other compatible component. Whenever the subwoofer detects a trigger signal between 3V
and 30V (AC or DC), the subwoofer’s amplifier will turn on. The subwoofer’s amplifier will
turn off after the trigger signal ceases, even when the Power-On Mode switch is in the “Auto”
position.
Line-Level In LFE Connector: Use the supplied mono RCA audio cable (with the purple
connectors) to connect the Line-Level In LFE connector to the BDS receiver’s Subwoofer
output.
Line-Level In L/R Connectors: NOTE: These connectors are NOT used with the
BDS receiver. If you connect the subwoofer to a different unit that does not have a dedicated,
low-pass-filtered subwoofer output, use these connectors.
If the unit has a separate subwoofer output, use the supplied mono RCA audio cable to
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connect the unit’s subwoofer output to either one of the subwoofer’s Line-Level In L/R
connectors.
If your unit does not have a separate subwoofer output, use two Y-adapters (not
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supplied). Connect one adapter’s single end to the unit’s preamp output for that
channel. Connect one of this adapter’s dual ends to the main amp input for that channel,
and connect the adapter’s other dual end to one of the subwoofer’s Line-Level In L/R
connectors. Repeat this process with the other Y-adapter, preamp channel, main amp
input and subwoofer’s Line-Level In L/R connector.
Main Power Switch: Set this switch in the On position to turn the subwoofer on. The
subwoofer will then either be on or in Standby mode, depending on the setting of the
subwoofer’s Power-On Mode switch.
Power Cord: After you have made and verified all subwoofer and speaker connections
described in this manual, plug the Power cord into an active, unswitched electrical outlet for
proper operation of the subwoofer. DO NOT plug this cord into the accessory outlets found in
some audio components.
Subwoofer Controls and Connections
Phase Switch
Bass-Boost Switch
Power-On Mode Switch
Subwoofer Level Control
External Trigger Input Connector
Line-Level In LFE Connector
Line-Level In L/R Connector
Power Switch
Power Cord