NHT IW4 owner manual „Installation Existing Construction, retrofitting finished walls, Foam

„Installation: Existing Construction

(retrofitting finished walls)

Warning: Exercise caution when drilling into existing walls. Do not drill through existing wires, pipes, conduits, heating or air conditioning ducts. If you feel resistance while drilling, stop immediately.

1.Using a studfinder or the "knocking" method, locate the wall studs in the wall area where you wish to mount the speaker. The speaker will be mounted between adjacent studs (fig.8).

2.Determine that there are no obstructions behind the desired cutout area. This may be accomplished by drilling a hole in the center of the cutout area and using an "L"-shaped piece of metal (like a coat hanger) to "feel around" behind the wall. If you discover an obstruction, fill the hole with patching compound and try another location.

Cutout		fig.8	Cutout
Horizontal			Vertical
			Cut
Cut
Drill			Drill
Stud	Stud	Stud	Stud

3.If there are no obstructions found behind the wall, use the supplied cutout template and a pencil to draw a 13 9/16" x 9" outline of the area to be cut out. Use a level to ensure that the cutout is precisely positioned. Begin by drilling the four corners with a ¼" bit (fig.8). Then cut out the wall section with a utility knife or keyhole saw, following the lines traced around the mounting template. If the wall is painted or wallpapered, use the keyhole saw.

4.If the wall is constructed of lath and plaster, outline the penciled marks with masking tape, drill the four corners with a 1/4" drill bit, and use a utility knife to cut through the plaster down to the lath. Use a saber saw with a metal cutting blade or a pair of tin snips to gently cut through the lath, being careful not to vibrate plaster off the wall.

5.NHT offers iWF foam blocks to optimize the performance if your iW4. See the web site for more information: nhthifi.com Refer to the diagram (fig. 9) for orientation of the foam blocks. Insert one of the 4" x 4" x 8" foam blocks vertically through the speaker cutout. Push this block down below the edge of the cutout. Insert the sec- ond 4" x 4" x 8" foam block and push up above the top edge of the speaker cutout. Bend one of the 4" x 4" x 16" foam blocks into a U shape and push down into the wall horizontally so that it is below the speaker cutout. Make sure that there is a good seal with the edge of the foam and both the left and right wall studs. Repeat for the upper 4" x 4" x 16" foam block. The foam should also make a good seal around the speaker wires.

		fig.9
	Foam		Foam
	Foam		Foam
			2 - 3 inches
	4 - 5 inches
	Cutout		Cutout
	Horizontal		Vertical
Stud	Stud	Stud	Stud
	Foam		Foam
	Foam		Foam