Niles Audio PSW8 manual Setting the Subwoofer Low-Pass Filter, Painting the Speakers

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.

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