The in-wall speakers are designed to be installed in the wall
area between studs. Make sure you are between two studs by
tapping on the wall. It will sound hollow between two studs and
sharper, more solid on top of or close to a stud. Once you
have located the desired studs, tape your speaker template to
the wall and lightly trace around the inside opening with a
pencil. Use a level to ensure your template is straight.
1. Remove the grille from the speaker carefully so as not to
damage the speaker parts.
2. Drill a 1" hole in the center of the template outline. Next,
using a piece of stiff wire such as a coat hanger, bend it 8"
from the end at a 90° angle. Insert the bent part of the wire
into the 1" hole and rotate the wire in a complete circle to
check for obstructions. If the wire hits a stud on either side,
reposition your template and redo the pencil outline. Keep
the pilot hole within the template outline. If the walls are
made of drywall, cut the marked area with your utility knife.
If your home has plaster walls, you'll need to drill pilot holes
at the four corners of the template outline and cut the
speaker opening using a keyhole saw. Check the speaker
opening by placing the speaker into the hole. The speaker
should fit loosely in the hole. Repeat the steps for each
additional speaker.
Before hooking up speaker wires, attach the rough-in to the
speaker. Using screws supplied, attach the rough-in to the
speaker back; do not tighten screws.
You can use IR-905 Plastic Rough-in with MS-905 and
IR-906 with MS-828 for new construction if desired. (These
rough-ins are not supplied with speakers).
Connecting MS-825 or MS-828 speakers to your TV or A/V
receiver is simple. Make sure the system is off. Refer to
Table 1 for choosing proper gauge wire, which depends on
the distance between the speaker and the amplifier/receiver.
The lower the gauge, the thicker the wire:
Length
Less than 10 feet
10-50 feet
More than 50 feet
Use Oxygen-free speaker cable. Strip about
from the wire at each end. Connect the wire to "RED" (+)
terminals of the speaker and the amplifier/receiver. Make
sure that the same wire goes from the "RED" (+) terminal on
your TV or amplifier/receiver to the "RED" (+) terminal on the
speaker. The "BLACK" (-) terminal of the speaker is
connected to the "BLACK" (-) terminal of the
amplifier/receiver.
For making the connection, simply press the lever on the
terminal. Push the wire in the slot and release the lever.
To install speaker into the wall, place the bottom of the
speaker into the cutout so that the rough-in is inside the wall.
Next, position the speaker so that it is positioned in the center
TABLE 1
Minimum Gauge
18
16
14
⁄
" of insulation
1
2
of the cutout. Before tightening the screws, use a level to align
the speaker. Tighten the screws evenly in a clockwise pattern
until the speaker is secure. Replace the grille, and your
installation is complete.
OPERATIONAL CHECK
After making all connections, check for proper operation.
Switch on the system. Select a channel on TV or select
music from a music source and slowly increase the volume.
You should hear sound from the speakers. If no sound is
heard from any or all speakers, switch off the system
immediately and check for open or loose connections, wrong
polarity or shorts.
OVERLOAD PROTECTION
The MS-825 and MS-828 are protected against amplifier
overload through a polyswitch which acts automatically.
Whenever there is an overload from the amplifier or if there
is a short in the speaker wires, the polyswitch automatically
opens, preventing tweeter failure. When the amplifier volume
is turned down so that it is not overloading the speakers or
when the short is removed from the speaker terminals, the
polyswitch automatically resets in 25-30 seconds.
VOLUME CONTROL
If desired, the volume from the speakers can be controlled
by using the 150 Watt NuTone autoformer stereo volume
control Model SVC-102. Refer to the instruction sheet of the
stereo volume control for further details.
CAUTION: MS-825 and MS-828 are not designed to be
used with NuTone Radio Intercom systems.
HOME THEATER SYSTEM
For best stereo/surround sound reproduction you must use all
speakers of the same brand in the system. The new NuTone
SENSONIC™ SURROUND SOUND 8 Ohm speakers are all
acoustically matched. Therefore, they can all be used in
combination to create sonically-balanced sound as it moves
across the screen in a home theater surround sound system.
For the most accurate and exciting reproduction of bass
frequencies, a separate sub-woofer should be used.
A basic surround sound system consists of a pair of front
channel speakers, a pair of rear channel speakers and a
center channel speaker. You can use the in-wall speakers
MS-825, MS-828, MS-838K, or even ceiling speakers MS-625,
MS-626 as front and rear channel speakers. You can also use
the surface mount speaker MS-525 as a rear channel speaker.
The front channel speakers should be mounted at
approximately ear level from a seated audience at the front.
Rear channel speakers should be placed on the side walls
about
1
⁄
to
2
⁄
of the distance from the viewing screen or the
2
3
front of the room to the rear of the room. The bottom of the
speaker cabinet should be at least 2 feet above the ear level
of the seated audience. Rear channel speakers can also be
placed at the rear or back wall at about 2 feet higher than the
ear level of the seated audience as before. For best surround
effect, the distance to the rear speakers from the audience
should be no more than 6 feet.
One important aspect of surround mode is the speaker delay.