Community SLS Manuel du propriétaire télécharger pdf (Page 26)

PAGE 26 Community Solutions™ Owner’s Manual

11.3 Front Grille

All SLS and SBS loudspeakers have a 16 gauge perforated steel grille on the face of the enclosures to

provide a finished appearance and to protect the drivers. The grille is essentially acoustically

transparent with a TI (Transparency Index) rating of over 13,700, where 10,000 is considered

essentially transparent.

The grille is painted using a powder coating process that bonds the paint to the steel. This prevents

the paint from easily chipping and the resulting matte finish reduces reflection of ambient light

sources. If desired for cosmetic purposes, the grille may be painted another color using standard,

non-bridging enamel paint. Spray painting is recommended.

The grille is a pan shape with a soft, PVC gasket fitted around its edge that serves several purposes. It

provides a snug fit for the grille into the front recess of the enclosure. This light clamping action has

the added effect of helping damp the grille to keep it from resonating. The gasket is also used to

retain the grille cloth on the -WHT models or a custom grille cloth.

11.3.1 Removing/Installing the Grille

Removal of the grille is accomplished by unscrewing the 4 #6 x 1-1/2” retainer screws in each corner

then pulling the grille away from the face of the enclosure to release the Quick-lock pads that help

support it (Refer to FIGURE 8). A small Allen wrench or similar tool can be used to hook the grille

through one of the perforations to aid in pulling it away from the enclosure. In the case of the -WHT

models with a grille cloth, carefully pull on the grille near a corner by sliding an Allen wrench or similar

tool in the gap between the enclosure and grille. Turn the wrench to hook the grille from behind and

pull it away from the enclosure.

To reinstall the grille make sure that the grille is correctly oriented so the Quick-lock pads on the grille

and enclosure will mate. Press the grille in place applying firm pressure on each of the pads to firmly

interlock them and replace the 4 corner retainer screws.

CAUTION:

When the loudspeaker is suspended or mounted overhead the grille must remain permanently

fastened in place so that it does not become detached. Make sure all corner retainer screws are

properly installed and tightened.

11.3.2 Custom Grille Cloth

To avoid high frequency loses, grille cloth must be made of inorganic (man-made) materials. It should

have at least a 50% open weave. A simple test is to hold the cloth about 4 inches (10 cm) in front of

your eyes. If you can easily identify objects 3 feet (1 m) or more away when looking through the cloth,

it is probably OK to use. Because of the tight fit of the retainer gasket, a thin cloth must be used.

The edge gasket is designed to retain a custom grille cloth should this be desired for cosmetic

purposes. Small teeth molded into the inside of the gasket help retain the cloth and gasket to the

edge of the grille. FIGURE 8 shows how to install a custom grille cloth.

FIGURE 8: Installing A Custom Grille Cloth

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Community SLS Manuel du propriétaire Page 26