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Instruction Manual

High Level Output

Connect main Left/Right speakers here when using the High 
Level Input.

High Level Input

If your electronics do not have a line-level sub out, connect the 
Left-Right speaker terminals of your electronics to these con-
nections. Set the SB-900DF’s crossover to “Lowpass,” and adjust 
accordingly. Make sure to set your receiver to “Large” for Left and 
Right speakers.

AC Input

Use the included power cord to connect your amplifier to a wall 
outlet.

Voltage Select Switch

Voltage switch for use in different countries. This switch will be set 
when you receive the unit. Change this setting only when you are 
sure your application requires it. For US, the switch should be set 
to the 115V position.

Product Serial Number

Write this number in the space provided on page 2 for future  
reference.

SERIAL

MODEL

SB900BJRWWY80100

SB-900DF-BLK Powered Subwoofer

Status LED

This will be green for "on" condition, red for "standby"

Standby Switch

When in ON position, the amplifier will always be on. When in the 
AUTO position, the amplifier will be in Automatic Standby Mode. 

Phase Switch

This switch allows precise acoustic matching with satellite speaker 
systems whose output may be phase reversed. Try in both positions 
— use the position that results in the strongest bass output. 

Bass Level Control

Use this control to set the level of bass desired

Crossover Control

An adjustable (55Hz to 200Hz) @ 18dB per octave low-pass 
crossover.

Low-Pass Switch

When in the LOW-PASS position, adjustment of the crossover can 
be made by the Crossover Control. If being fed a pre-filtered or THX 
signal, place the switch at the BYPASS position. 

Low Level Input

Use the input to connect to the subwoofer or LFE line out from 
your processor/receiver.

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SB-900DF Subwoofer Rear Panel

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