NHT Speaker IW4 User Manual

®
iW4  
In-Wall Loudspeaker  
OWNER’S MANUAL  
Now Hear This  
6400 Goodyear Road  
Benicia, CA 94510  
800-NHT-9993  
 
Placement  
The iW4 is designed for in-wall installation, oriented vertically or horizontally between standard 2" x 4" wood studs.  
Installation in outdoor locations or in moisture-prone interior environments such as indoor swimming pools or saunas is not  
recommended.  
Spend some time considering speaker placement prior to installing the iW4. Once  
the speakers are installed, they are permanent, so their location should be  
selected carefully. Mount the speakers in a location where they face the listening  
area without obstruction from furniture, and are preferably at least three feet from  
side walls. The speakers should be mounted on a flat surface to ensure a good  
seal between the bezel and the mounting surface. For optimal imaging, position  
the speakers so that the distance between the listening position and the wall is 1.5  
times the distance between the two speakers (fig.1). If possible, position the  
fig.1  
speakers so that the average ear height of the listeners is the center of the 2”  
midrange dome (or slightly below). To get an idea how the speakers will look in the  
room, try taping the supplied cutout templates to the wall.  
Keep in mind that room furnishings play an important role in absorbing and reflecting sound waves. Midrange and high  
frequencies in particular will be absorbed by soft furnishings such as sofas, carpets and curtains. A large number of these  
soft furnishings will dull the sound, while a "live" room with few furnishings will brighten the sound. You can adjust the  
sound of the speakers in your room by adding or removing soft wall hangings, curtains and furniture to achieve the sound  
that you desire.  
As the iW4 is not magnetically shielded, do not install it in a  
location where it will be within 12" of a direct view (tube)  
television. Unshielded magnets placed in close proximity to a  
television screen can cause picture discoloration and eventually  
damage the picture tube. Magnets don’t effect projection, LCD  
or plasma type televisions.  
When installing three iW4's for front channels in a home theater  
system, you can position the L & R speakers farther apart to  
create a wider soundstage. The iW4 should be installed with the  
midrange dome closest to the television. The placement diagram  
to the right shows three possible orientations.  
 
iW4 Pack  
iW4 Pre Construction Bracket  
Kit  
Packing List:  
"iW4" pack includes:  
(1) MDF Baffle with drivers and crossover  
(1) Bezel  
(1) Metal grille  
(1) Cutout template  
(12) 4 x 20mm recessed head screws  
(8) 4 x 50mm recessed head screws  
"iW4" pre construction bracket kit includes:  
(1) Mounting bracket  
(2) Mounting wings, aluminum  
Tools Needed:  
#2 Philips screwdriver  
Pencil  
Tape measure  
Utility knife or keyhole saw  
Masking tape  
Level  
Wire strippers  
Safety goggles  
Protective gloves  
Tech Tips: Pre-Wiring for New Construction  
1. For best results, avoid running speaker wire near electrical wire, as it may induce a 60Hz hum in the audio signal. It’s a good  
idea to run the speaker wire after the electrical wiring has already been completed, so that you can route the speaker wire at  
least three feet away from the electrical wiring. If speaker wire and electrical wiring must run parallel, install the wire within a  
metal conduit. Note that low-voltage wiring (doorbell, intercom, telephone, security, etc.) are unlikely to induce hum and can  
typically be run parallel to speaker wire with no detrimental effects.  
2. When drilling holes through wall studs or ceiling joists, use a drill bit that is at least as wide as the speaker wire that will be  
routed through them. Always drill through the center of the stud or joist. If the hole must be drilled within one inch of the edge  
of a wall stud, add a nail plate to the drywall side to protect the wire from possible nails and screws put in the wall later. Line  
up the holes in the studs or joists as you go, so that pulling the wire through them will be easier.  
 
Tech Tips: Optimizing Sonic Performance  
Bass response is smoothest when the speaker is mounted within a rigid wall that flexes very little. For improved  
performance, add 2"x4" cross-braces horizontally roughly 15 inches above and below the speaker location. Use wood  
glue and extra screws when attaching the drywall to the studs around the speaker. Additionally, once the speaker cutout  
has been made in the drywall, add a bead of wood glue inside the wall where the drywall meets the studs and  
cross-braces. If possible, use two layers of drywall for maximum rigidity.  
Installation: New Construction  
(unfinished walls)  
fig.2  
1 4  
1 3  
1 2  
1 1  
0 1  
3
4
5 1  
5 1  
6 2  
7
8
9
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2
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4
5
6
7
8
9
10  
11  
12  
13  
14  
1 4  
1 3  
1 2  
1 1  
0 1  
3
4
7
8
9
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
1. Begin by installing the mounting bracket between adjacent studs.  
Attach the mounting wings to the bracket by inserting them into the  
locking plastic tabs in the side of the bracket (fig.2).  
1
2
1
2
3
1
2
1
2
3
2. Select the desired location for the speaker, using a level to ensure  
that it is precisely positioned. The wings feature progressively  
elongated sections (1", 1", 2", 2", 2", 3", 3") with screw holes spaced  
in one-inch increments. Attach the wings to the studs with screws or  
staples. Break off the extra portion of the wing by bending it at one of  
the pre-stamped "break" lines (fig.3).  
Break  
Break  
fig.3  
1 4  
1 3  
1 2  
1 1  
0 1  
3
4
5 1  
5 1  
6 2  
6 2  
7
8
9
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
1 4  
1 3  
1 2  
1 1  
0 1  
3
4
7
8
9
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
3. Complete the pre-wiring before the drywall goes up (see "Tech  
Tips: Pre-Wiring for New Construction" on the previous page). Leave  
an extra few feet of speaker cable, and secure it to the cable tie on  
the mounting bracket (fig.4).  
Break  
Break  
4. During the drywall phase, cut a hole 13 9/16" x 9" around the brack-  
et. The bezel outer frame will extend out about 1 inch beyond the  
perimeter of the cutout to hide minor imperfections in the cutout.  
Cable Tie  
1
2
3
fig.4  
1
2
3
5. After the drywall is complete, attach the bezel to the bracket with  
(8) 4 x 50mm recessed head screws that line up with the 8 raised  
bosses on the bracket (fig.5). Tighten screws snugly, making sure not  
to over-tighten, as this may compromise the fit of the bezel. The use  
of power screwdrivers is not recommended. The absorptive strip on  
the back of the bezel's outer frame reduces unwanted vibrations and  
will compress slightly to allow the frame to rest flush against the wall  
on all four sides. When installed correctly, the bracket and bezel  
"sandwich" the drywall.  
fig.5  
 
6. If the iW4 bezel frame and grille are to be painted in the wall, paint  
fig.6  
now before installing the baffle (see "Painting" on the last page).  
7. 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. 6) 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 second 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.  
Foam  
Foam  
2 - 3 inches  
4 - 5 inches  
Cutout  
Horizontal  
Cutout  
Vertical  
Foam  
Foam  
8. Add a 26" long piece of unbacked R19 fiberglass insulation to the  
enclosure. (Be sure to wear protective gloves and goggles when han-  
dling fiberglass to avoid contact with the fiber). You may need to cut  
a 11" wide by 7" high rectangular hole in the center of the piece of  
fiberglass to make room for the crossover on the back of the baffle.  
fig.7  
9. Connect the speaker wire to the spring posts on the iW4 baffle,  
making sure to observe correct polarity (see "Connections").  
2
10. Attach the baffle to the bezel with (12) 4 x 20mm recessed head  
screws that line up with the 12 holes in the bezel (fig.7). Exercise cau-  
tion not to damage the drivers. Tighten screws snugly, making sure  
not to over-tighten, as this may compromise the fit of the baffle. The  
use of power screwdrivers is not recommended.  
2
11. Attach the metal grille by inserting it into the bezel.  
 
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.  
fig.8  
Cutout  
Horizontal  
Cutout  
Vertical  
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).  
Cut  
Cut  
Drill  
Drill  
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.  
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.  
fig.9  
Foam  
Foam  
2 - 3 inches  
4 - 5 inches  
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.  
Cutout  
Cutout  
Horizontal  
Vertical  
Foam  
Foam  
 
6. Insert the iW4 mounting bracket diagonally through the cutout in  
the wall, then pull forward into position. If the cutout was cut cor-  
rectly according to the cutout template, the bracket should fit snug-  
ly into place. The plastic tabs on all sides of the bracket will rest  
against the rear side of the wall (fig.10). If the tabs interfere with a  
stud, break them off with pliers.  
fig.10  
7. While holding the bracket flat against the rear side of the wall  
with one hand, attach the bezel to the bracket with (8) 4 x 50mm  
recessed head screws that line up with the 8 raised bosses on the  
bracket (fig. 11). Tighten screws snugly, making sure not to over-  
tighten, as this may compromise the fit of the bezel. The use of  
power screwdrivers is not recommended. The absorptive strip on  
the back of the bezel's outer frame reduces unwanted vibrations  
against the drywall, and will compress slightly to allow the frame to  
rest flush against the wall on all four sides. When installed correct-  
ly, the bracket and bezel "sandwich" the drywall.  
fig.11  
1
8. If the iW4 bezel frame and grille are to be painted in the wall,  
paint now before installing the baffle (see "Painting" on the next  
page).  
1
9. Add a 26" long piece of unbacked R19 fiberglass insulation to  
the enclosure. (Be sure to wear protective gloves and goggles  
when handling fiberglass to avoid contact with the fiber). You may  
need to cut a 11" wide by 7" high rectangular hole in the center of  
the piece of fiberglass to make room for the crossover on the back  
of the baffle.  
10. Connect the speaker wire to the spring posts on the iW4 baffle,  
fig.12  
making sure to observe correct polarity (see "Connections").  
11. Attach the baffle to the bezel with (12) 4 x 20mm recessed head  
screws that line up with the 12 holes in the bezel (fig. 12). Exercise  
caution not to damage the drivers. Tighten screws snugly, making  
sure not to over-tighten, as this may compromise the fit of the baf-  
fle. The use of power screwdrivers is not recommended.  
12. Attach the metal grille by inserting it into the bezel.  
 
Painting  
The bezel frame and grille of the iW4 are finished in a matte white powder-coated finish that may be painted to match the  
wall. Keep in mind that the grille contains hundreds of tiny holes that are essential to the sound of the speaker. Take care  
not to cover these holes with paint.  
1. Paint the bezel frame and the grille at the same time using the same paint. Do not install the fiberglass sheet in the  
space formed by the acoustic foam because overspray from painting will reduce its effectiveness. We do not recommend  
painting while the baffle with the drivers is installed. The baffle itself is paintable if you remove the drivers; however, the  
black finish of the baffle prevents the speaker's black drive units from being visible once the grille is in place.  
2. When using spray paint, apply two thin coats, making sure to let the first coat dry completely before applying the  
second. This will avoid running. When using a compressor and spray gun, apply the paint using its finest setting. Painting  
with a brush is not recommended, but when necessary be sure to thin the paint so as not to cover the holes in the grille.  
If paint does cover any of the grille holes, poke them out with a paper clip.  
Connections  
Before connecting speakers to your system, it is important that you turn off the power to your amplifier / receiv-  
er to avoid damage to the equipment. Before installing the iW4, map out the wiring paths between the speakers  
and the amplifier. Make sure that the speaker wire does not rest on sharp or pointed objects.  
The iW4 is compatible with virtually all quality amplifiers. Proper wiring of the speakers is essential to good sound. At a  
minimum, 16AWG 2-conductor speaker wire is recommended for runs of 10 feet or less, with larger gauge special purpose  
speaker wire suggested for longer runs. For best results, use equal length runs of wire for all speakers. When  
permanently installing wire inside walls, be sure to use wire that is rated for in-wall use and has special jacketing  
for fire prevention. In the U.S., the U.L. standard is CL-2, CL-3 and CM wire, and in Canada the CSA standard is  
FT4 wire. The wires should be run in accordance with National Electrical Code and any applicable local building  
codes. Prepare the wire by stripping 1/4" to 3/8" of insulation from the ends and twisting the exposed wire strands tight-  
ly. The spring-loaded binding posts on the back of the speaker will accept raw wire only.  
Be sure to wire both the left and right speakers "in-phase." That is, the Positive (red) terminal on the amplifier  
output must be connected to the corresponding Positive (red) terminal on the speaker. Likewise with the Negative  
(black) terminals. All speaker wire have some sort of marking along one or both conductors to help you make the  
correct connections. Incorrect speaker phase is indicated by weak bass and the lack of a well-defined stereo image.  
Operation  
The iW4 was designed to handle a wide range of listening levels, but every speaker has limits. It is important to use  
common sense and listen for signs of possible distress from the speakers. Underpowered amplifiers are most often the  
cause of speaker damage. For example, a 60-watt amplifier runs out of power when called upon to produce more than 60  
watts, and the resulting distortion can damage the speaker. If you tend to listen at high volume levels, more powerful  
amplifiers are preferable because they are less likely to run out of power.  
Noticeable distortion or harsh breakup is an indication that either your amplifier or your speakers are running beyond their  
capacity, and the volume should be decreased. If you can feel any heat emanating from the woofers or tweeter, reduce  
the level immediately. Speaker damage most often occurs from sustained high volume levels, not from transient sounds  
or brief musical peaks. Excessive boosting of bass, treble or equalizer controls can worsen the problem, and is not  
recommended.  
 
Maintenance  
The iW4's require minimal maintenance under normal use. The grille and frame may be cleaned using a damp cloth or a  
mild, non-abrasive cleaner. Do not expose the speaker to direct sunlight, high temperatures, or moisture. Do not attempt  
to clean the actual drivers.  
Limited Warranty  
Valid Only in the U.S.A. and Canada  
Warranty Period  
For the period of 5 years for parts and 5 years for labor from date of original purchase (the warranty period) from an authorized NHT dealer, Now Hear This  
(NHT) warrants that if our product fails to function properly under normal use due to a manufacturing defect when installed and operated according to the  
owner’s manual instructions enclosed with the unit, it will be repaired or replaced with a unit of comparable value at the option of NHT without charge to you for  
parts or actual repair work. Parts supplied under this warranty may be new or rebuilt at the option of NHT.  
What’s Not Covered  
This warranty does not cover any product which is used in any trade or business, or in an industrial or commercial application.  
This warranty does not cover the cabinet or any appearance item, or any damage caused to the product resulting from: alterations, modifications not author-  
ized in writing by NHT, accident, misuse or abuse, damage due to lightning or power surges, or being subjected to power in excess of the speaker’s published  
power rating.  
This warranty does not cover the cost of parts which would otherwise be provided without charge under this warranty, obtained from any source other than an  
authorized NHT service location. This warranty does not cover defects or damage caused by the use of unauthorized parts or labor or from improper mainte-  
nance.  
Altered, defaced or removed serial numbers void this warranty.  
Your Rights  
The liability of NHT will be limited to the purchase price of the product, and NHT will not be liable for incidental or consequential damages. NHT limits its obli-  
gations under any implied warranties under state laws to a period not exceeding the warranty period. Some states do not allow limitations on how long an  
implied warranty lasts, and some states do not allow the exclusion or limitation of incidental or consequential damages. The above limitations or exclusions may  
not apply to you. This warranty gives you specific legal rights, and you may have other rights which vary from state to state.  
To Obtain Service  
NHT has appointed a number of authorized service companies throughout the USA should your product ever require service. To receive warranty service, you  
will need to present your sales receipt showing place and date of original owner’s transaction.  
To find the name and address of the nearest authorized NHT service location, call or write: Customer Service Department, Now Hear This, 6400 Goodyear  
Road, Benicia, CA 94510. 800-NHT-9993.  
Please do not return product to this address. It is not a service location.  
Keep this warranty with your sales receipt. Record date and place of purchase for future reference.  
 

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