Note: Do not attempt to replace the included microphone with one of your own. The calibration microphone is a
special model specifically designed for subwoofer frequencies. Use of alternate microphones may damage SOS.
Do not perform the Subwoofer Optimization System calibration and adjustment procedure on your
system with any of the bass, treble, or loudness (contour) controls in operation. Defeat these controls
or adjust them to their minimum (zero) positions prior to the start of the procedure.
Once the system has been properly calibrated, these controls can be used to 'fine tune' the system.
Note: When calibrating two or more subs, run only one sub/SOS calibration at a time.
Set the gain control to a mid-point (50 to 65%) prior to the start of the calibration procedure. Operating
the amplifier at high volumes will place undue strain on the electronics and speaker drivers, and could
damage them.
If your subwoofer amplifier has a Crossover Frequency Control, you have two options. Option one:
Defeat the control or set the control maximum (highest frequency) setting prior to the start of the
calibration procedure.
Option two: Set the crossover 10-20Hz higher than your planed final crossover setting (on your
processor or the sub itself). The reason for this is if your room causes a peak at 120Hz for example but
you plan on utilizing an 80Hz crossover, SOS will remove the peak at 120Hz but this will be of no
benefit to you. Option one is easiest and will work for most rooms.
Following SOS calibration, the control should be reset as part of the final system balance procedure.
If your receiver or processor has a subwoofer volume (level or gain) setting, set that control to a
mid-value prior to the start of the calibration procedure. Once the system has been properly calibrated,
this control can be used to set the subwoofer level to best integrate with the rest of the system. Failure
to do so may affect the calibration procedure, may limit the ability to adjust the system following the
calibration procedure, or may damage the components.
Whenever changing components, cables, plugs, or wires, be sure to first turn off all equipment. This
prevents signal transients from passing through your system, which can damage components.
1. Turn off your receiver or processor and amplifier(s), including the ULW-10 amplifier, and all
source equipment such as CD, DVD, and VCR players, TVs, Tuners, etc.
2. Connect the line level input (RCA) cable from your receiver or processor and the other end to the
LFE connector on the ULW-10.
3. Plug in the supplied microphone into the mic input port on the ULW-10.
4. Turn on the subwoofer amplifier, and set the volume and crossover frequency controls as
mentioned in the Getting Started Section.
The Subwoofer Optimization System is now ready for calibration and use. Proceed to the
CALIBRATION PROCEDURE Section to perform this operation.
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Section 4—Setting Up Your Surround Processor or Receiver
Getting Started
Connections
11.
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SOS
