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connection & calibration - stereo system
defaults
Ensure the main power switch is off and •
connect the mains power cord.
Set • volume on your subwoofer to middle
position.
Set • phase to 0°.
Select desired • low pass (crossover
frequency) setting on your subwoofer. As
a guide set the subwoofer lowpass to 20hz
above the main speakers low frequency
limit. (Refer to main speaker specifi cations
e.g. 60Hz -20Khz speaker would require
80Hz setting, shown left)
Set • power mode to auto (middle position).
connection
Requires your amplifi er to feature L&R
pre-out connections.
Use two Y cables to connect the each •
Pre-out channel on your amplifi er
(or pre-amplifi er) to the corresponding
subwoofer and main amplifi er inputs.
If main-inputs are not present on your
amplifi er
simply connect the pre-outputs to
subwoofer line inputs.
calibration
It is benefi cial to select music that is familiar
to you when carrying out listening tests and
calibration procedures. As a suggestion play
clean unprocessed recordings that use double
bass, bass guitar, cellos, organ or kick drum etc
that cover a wide bass spectrum.
Begin by playing music and slowly adjust the
volume dial on the subwoofer to your desired
level. For fi nal tweaking of your subwoofer
level you may wish to sit in the primary
listening position and ask an assistant to adjust
the volume dial on your subwoofer.
Now set the phase dial. The correct phase
setting will produce the most bass. You may
need to listen to a variety of recordings to hear
any subtle change in bass energy. If no change
in bass energy can be heard between phase
settings, set phase to 0° default position. Re-
adjust volume if necessary.
You may wish to fi ne-tune the crossover
frequency/low pass setting. This will vary
the amount of overlap from the subwoofer to
the main speakers and increase or decrease
the level at those frequencies. The effect is a
strengthening or weakening of the upper bass
region. Unpleasant ‘woody’ or ‘chesty’ sound
qualities may suggest the low pass setting
selected is too high. If the sound lacks ‘body’
the low pass setting selected may be too low.
Re-adjust low pass setting, volume and then
phase. Re-evaluate results.
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