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19
Final Installation In New Or Existing Construction
Setting the Subwoofer
Low-Pass Filter
With the “Low Pass” switch in the 100Hz
position, the PSW8 will only reproduce
bass below one hundred cycles. When the
switch is in the 140Hz position, the PSW8
will reproduce bass below 140 cycles.
Depending on the size of the room, the
type of satellite speaker and the subwoofer
position, you will prefer one setting to the
other. Listen to a loud and well recorded
bass passage to evaluate
(See Figure 23).
Install the grille into the speaker. The grilles
should fit snugly. If you have difficulty fitting
them in, try loosening the screws used to
secure the frame to the bracket slightly
(excessive tightening can distort the shape of
the frame holding the grille in place).
Painting the Speakers
All models may be painted. The plastic will
readily accept most paints.
The subwoofers must be masked prior to
painting them. The inside rectangular por-
tion of the hole template can be used as a
paint mask. Remove the outside portion of
the template by gently pulling along the
perforation. Affix the mask to the front of
the speaker by friction-fitting the mask into
the bezel.
The grilles should be painted before they
are installed. For all models, the best
results will be obtained by using a spray
gun or airless sprayer, thinning the paint
(prevents clogging of grille holes), and by
applying several light coats instead of one
heavy one.
Speaker/Subwoofer Phase
Speaker wire has two conductors. One
conductor is attached to the negative (–)
terminals and one conductor is attached to
the positive (+) terminals of both your
speaker and your amplifier. Usually, the
wire is marked for your convenience.
There are different ways wires are marked:
a stripe on one wire, a ribbed area of one
conductor you can only feel, different col-
ors of metal wire on each conductor, or
there might be a fabric strand or string
wound into one of the conductors. Of
course, there are some wires which appear
completely identical. Be careful, or you
might make a mistake.
If you make a mistake, there are three pos-
sibilities:
1) Subwoofer Input Phase Reversal
The Left Input of the subwoofer is out of
phase with the Right Input. If this is the
case, you will hear almost no output out of
the subwoofer when playing a loud bass
passage. Try reversing one of the subwoofer
inputs. If the sound gets a great deal louder,
that was the problem. If bass sound was
reduced, return the connections to their
original state.
2) Subwoofer /Satellite Relative Phasing
An acoustically out-of-phase sat/sub combi-
nation works against each other and the
sound of the overall system will be lacking
in bass. This might be because of the
posi-
tion of the subwoofer
rather than an error in
wiring. Try reversing the phase of both the
left and the right outputs of the subwoofer.
Make sure you evaluate (listen) from the
primary listening position.