While the Subwoofer Optimization System calibration process is automatic, following these suggestions
will help insure the maximum benefit from the unit for your system's performance.
Configure the listening environment as closely as possible to how it is arranged during normal opera-
tion. Furniture should be located where itis normally positioned during system use and heating and
cooling systems should be operating. This includes anything that is normally in operation during the
use of the system, such as projectors, lowered screens, draperies, and doors.
Calibration Procedure
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Suggestions
Check that your receiver/processor and all amplifiers, except the subwoofer amplifier, are powered off.
Also check that all sound source components (e.g., CD, DVD, TV, Tuners, VCR, etc.) are off.
Unwrap the microphone and cable that came with the unit. The system provides a twenty-foot cable,
which should be sufficient to reach from the Subwoofer Optimizer System unit to the primary listening
position. In situations where the cable will not reach, do not attempt to add an extension to the cable.
Either select a listening position as close to the primary position as is possible. The object is for the
microphone to be in a position as close to where you would normally be located within the listening
environment as possible. The microphone should be oriented such that it is at your seated ear level
with the large, cartridge end pointing toward the ceiling. The microphone can be held (good), attached
to a support (better), or fixed to a stand (best). Be sure to not cover the cartridge end of the microphone
and that the unit is several inches away from any other body or surface. Refer to the Microphone
Placement Section (see below) for additional information. Insert the plug from the microphone into the
MIC connector on the ULW-10.
Set the switches on the ULW-10 to OPERATE – FILTER – NORMAL.
The green indicator light (labeled CAL’D) on the ULW-10 (the same end as the function switches) should
not be lit [first time use only].
Set the switches on the ULW-10 to CAL – FILTER – NORMAL. After approximately 5 seconds a series of
low frequency tones should be audible from the subwoofer. These tones will repeat with increasing
volume.
a. If the tones stop after 1 cycle and the green CAL’D light flashes slowly (approximately once per
second), this indicates that either the microphone or subwoofer is not properly connected, or that the
subwoofer amplifier level control is set too low. If this is the case, set the unit switches to OPERATE –
FILTER – NORMAL, check all connections, and increase the subwoofer amplifier level slightly. Set the
unit’s switches to CAL – FILTER – NORMAL. The repeating series of tones should again start.
b. If the tones stop after 1 cycle and the green CAL’D light flashes quickly (approximately three times
per second), this indicates that the subwoofer amplifier level control is set too high. If this is the case,
set the unit switches to OPERATE – FILTER – NORMAL and decrease the subwoofer amplifier level
slightly. Set the unit’s switches to CAL – FILTER – NORMAL. The repeating series of tones should again
start.
c. This procedure may need to be repeated by the user until the subwoofers output level is optimized
to support filter calibration.
Once levels are properly set, the calibration tones will repeat, the response measurement procedure
and filter settings will be made, and the green CAL’D light will light continuously. This indicates a
successful calibration.
Set-up
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SOS