NuTone SENSONIC MS-625, SENSONIC MS-626 Installation Instructions Manual

Congratulations on choosing NuTone loudspeakers! Great
care has been taken in their design, choice of material and
manufacture to maximize their performance at affordable
cost. When used individually with other 8 Ohm stereo
speakers in any 8 Ohm stereo amplifier system or in
combination with other NuTone 8 Ohm stereo speakers in
the “MS” series, they will provide years of excellent,
balanced and distortion-free listening pleasure.

INTRODUCTION

The MS-625 and MS-626 are two-way ceiling speakers.
MS-625 consists of a 51⁄4" woofer and a 1⁄2" dome tweeter.
MS-626 consists of a 61⁄2" woofer with polymica cone with
butyl rubber surround and a 3⁄4" Titanium dome tweeter with
Neodymium magnet and is the premium product in this
series, specifically designed to reproduce music and speech
in an exceptionally clear, crisp manner.

Two of these speakers can be used as front or rear channel
speakers in a surround sound system. Multiple speakers can
also be used for providing background or secondary music.
These speakers are designed for wall or ceiling mounting.
When mounted on ceilings, their round shape makes them
unobtrusive since they blend easily with other electrical
fixtures, which are normally round in shape. They are also
ideally suited for mounting on irregularly shaped walls or
cathedral type ceilings.

NuTone SENSONIC™ SURROUND SOUND Ceiling
Speakers are acoustically matched to other stereo speakers
in the “MS” series. A well-balanced home theater system can
be built using the optimally-engineered speaker components.
The “MS” series includes a variety of two-way and three-way
in-wall speakers, center channel speaker, sub-woofer, and
two-way indoor/outdoor speakers to complete a system.

SWIVEL DOME TWEETER

Unlike low frequencies, high frequencies are highly
directional. This means that you should be almost directly in
front of the tweeter that reproduces the high frequencies to
hear them well. Since in practice the ceiling speaker is likely
to be installed in an area not directly overlooking the
listening area, NuTone ceiling speakers have a tweeter
which can be swiveled 360° on its axis at an angle of 15° up
or down with respect to its surface. This ensures that every
tone in the music is heard clearly no matter where the
speaker is installed.

INSTALLATION

You can mount the ceiling speaker MS-625 or MS-626 easily
since they do not require rough-ins. Refer to Figure 1. Using
the template provided, cut a hole in the ceiling. Make sure
the tabs on the mounting bosses are facing inward. Remove
the grille carefully using a screwdriver, taking care to ensure
that it is not damaged, and place it aside. Unscrew the four
screws on the face of the speaker until they are about 3⁄4 of
the way out.

If the grille vibrates, you may apply a small amount of the
black acoustic damping material (packed with the speaker in
a small plastic bag).

Connecting the ceiling speaker to your amplifier 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:

Use oxygen-free speaker cable. Strip about 1⁄2" of insulation

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 connection, simply press the lever on the terminal.
Push the wire in the slot and release the lever.

CEILING MOUNTING

Place the speaker in the hole in the ceiling. Using the

READ & SAVE THESE INSTRUCTIONS!

INSTALLATION INSTRUCTIONS

®

SENSONIC™SURROUND SOUND
CEILING SPEAKER

Models: MS-625 (51⁄4" woofer and 1⁄2" dome tweeter)

MS-626 (61⁄2" woofer and 3⁄4" dome tweeter)

TABLE 1

Length Minimum Gauge

Less than 10 feet 18

10-50 feet 16

More than 50 feet 14

screwdriver, screw in the 4 mounting screws on the face of
the speaker until it sits snugly on the ceiling.

If the grille of the speaker vibrates, you may apply a small
amount of the black acoustic damping material (packed with
the speaker in a small plastic bag) between the grille and the
cabinet. The NuTone logo on the grille can be swiveled to
any position desired. You may also apply a small amount of
the black acoustic damping material to the logo from behind
the grille if it is loose.

You can now place the grille on the face of the speaker and
gently push it in. In case you need to remove the speaker,
simply remove the grille. Using the screwdriver, unscrew the
4 screws as before until the speaker comes loose from its
seating on the ceiling.

As mentioned above, the ceiling speakers are equipped with
a unique tweeter which can be rotated. Hence, you may
wish to turn/swivel the tweeter so that it points to the main
listening area. You may wish to adjust the position at various
angles while listening to high notes in music to determine the
position that gives the best result. Once adjusted in this way
for a particular installation situation, you do not need to
adjust it again.

OPERATIONAL CHECK

After making all connections, check for proper operation.
Switch on the system. Play music 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.

VOLUME CONTROL

If desired, the volume from the ceiling speaker can be

controlled by using the 150 Watt NuTone autoformer stereo
volume control SVC-101 for MS-625 or SVC-102 for
MS-626. Refer to the stereo volume control instruction sheet
for further details.

CAUTION: The ceiling speakers MS-625 and MS-626 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 1⁄2 to 2⁄3 of the distance from the viewing screen or the
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.

CEILING SPEAKER

Woofer mounting
screws
(Do not remove)

FIGURE 1

Swivel dome tweeter
(Press around the
edge to swivel)

Mounting screws
for installation

Mounting tabs
(Ensure the tabs face
inward before installing)

Grille

Enclosure