I N S T A L L A T I O N G U I D E
FOR CONNECTING UP TO 10 PAIRS OF SPEAKERS
S P E A K E R S E L E C T I O N S Y S T E M
MSA-10A
INTRODUCTION
The MSA-10A allows you to connect up to ten pairs of speakers to your stereo receiver or amplifier
and play any or all pairs simultaneously. You don’t have to worry about overloading your amplifier.
The MSA-10A uses a special autoformer matching system that keeps your amplifier running safely
– even if you have all ten pairs of speakers playing at the same time. The autoformers maintain a
nominal 8 ohm load on the amplifier, making it safe for use with most quality amplifiers. Each of the
ten speaker pairs can have a nominal impedance of anywhere between 4 and 16 ohms. Isolated left
and right channel ground returns make the MSA-10A compatible with all types of amplifiers including
those with “isolated” or “floating” output grounds. The removable rear panel connector blocks accept
speaker wire up to 14 gauge in size.
NOTE: THE MSA-10A IS DESIGNED FOR USE WITH A RECEIVER OR AMPLIFIER HAVING A MAXIMUM
POWER OUTPUT OF 200 WATTS PER CHANNEL (RMS). DAMAGE CAUSED BY THE USE OF A HIGHER
POWER RECEIVER OR AMPLIFIER WILL VOID THE WARRANTY.
FEATURES
• Power handling: 200 watts per channel RMS
• Accommodates 10 pairs of speakers
• Premium autoformers ensure efficient impedance matching, low power loss,
and no heat generation
• Automatic Impedance Protection
• Removable Speaker output terminals accommodate up to 14-gauge wire
• Removable Amplifier input terminals accommodate up to 14-gauge wire
• 72 adhesive-backed room identification labels
• Includes 16Volt AC Power Supply
• Two-year limited warranty
1
NILES AUDIO CORPORATION – 1-800-BUY-HIFI
INSTALLATION
CONNECTIONS
NOTE: WHEN CONNECTING THE MSA-10A TO RECEIVERS OR AMPLIFIERS WITH “A” AND “B” SPEAKER
SELECTION, CONNECT THE MSA-10A TO SPEAKER POSITION “A”. DO NOT CONNECT ANYTHING
TO SPEAKER POSITION “B” TO PREVENT THE AMPLIFIER FROM DRIVING AN UNUSUALLY LOW
IMPEDANCE LOAD.
NOTE TO OWNERS OF TUBE AMPLIFIERS: VIRTUALLY ALL TUBE AMPLIFIERS MUST HAVE A LOAD
CONNECTED AT ALL TIMES. IF THE AMPLIFIER TO BE CONNECTED TO THE MSA-10A IS A TUBE
AMPLIFIER, BE SURE TO ALWAYS HAVE AT LEAST ONE PAIR OF SPEAKERS SWITCHED ON AT ALL TIMES.
AN ALTERNATIVE IS TO PERMANENTLY CONNECT A 150 OHM, 5 WATT RESISTOR ACROSS THE TUBE
AMPLIFIER’S OUTPUT IN PARALLEL WITH THE MSA-10A. SEE FIGURE 2 FOR THE HOOKUP DIAGRAM.
Refer to Figure 1 on the following page for hookup diagram. Use #20 through #14 gauge speaker
wire for all connections.
The insulation on each wire should be stripped 1/4" – no more – the ends twisted tightly together,
then inserted into the appropriate hole on each rear panel terminal block. Secure each wire by
tightening the small set screws on the top of the terminal blocks. Be certain that proper “phasing”
is observed: connect the positive (+) terminals on the MSA-10A to the positive terminals on the
amplifier and speakers and negative (-) terminals on the MSA-10A to the negative terminals on the
amplifier and speakers.
OPERATION
Operation is straightforward. Simply depress the button(s) corresponding to the speaker pair(s) you
wish to play. To turn a pair off, simply press the button again.
SPECIFICATIONS
Audio Power Handling:
200 Watts per channel (RMS)
350 Watts per channel (peak music power)
AC Power Requirements:
Overall Dimensions:
Weight:
120-volt to 16-volt AC transformer (supplied)
17-3/8" wide x 3-7/8" high x 7-5/8" deep
15 lbs.
2
Figure 1
Example of using the MSA-10A to connect 10 pairs
of speakers to a receiver or amplifier.
Speaker Pair 10
Speaker Pair 1
Amplifier
Speaker “A” Out
1
2
3
4
1
2
3
4
1
+
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3
4
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+
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4
+
+
+
L
+
+
+
+
+
L
+
+
L
+
+
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+
L
+
+
+
+
+
+
R
1
L
L- R-
R
L- R-
R
L
L- R-
R
L
L- R-
SPEAKER
R
L- R-
SPEAKER
R
L- R-
SPEAKER
R
L
L- R-
SPEAKER
R
L- R-
SPEAKER
R
L
L- R-
SPEAKER
R
L
L- R-
SPEAKER
R
L
L- R-
SPEAKER
AMPLIFIER
SPEAKER 10 SPEAKER
9
8
7
6
5
4
3
2
Unswitched AC Outlet
16V AC Adapter
(Included with MSA-10A)
Figure 2
Example of using the MSA-10A
with a tube-type amplifier.
150
150
1
2
3
4
1
2
3
4
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L+ L- R- R+ L+ L- R- R+ L+ L- R- R+ L+ L- R- R+ L+ L- R- R+ L+ L- R- R+ L+ L- R- R+ L+ L- R- R+ L+ L- R- R+ L+ L- R- R+ L+ L- R- R+
AMPLIFIER SPEAKER 10 SPEAKER SPEAKER SPEAKER SPEAKER SPEAKER SPEAKER SPEAKER SPEAKER SPEAKER
9
8
7
6
5
4
3
2
1
NILES AUDIO CORPORATION – 1-800-BUY-HIFI
3
LIMITED WARRANTY
NILES AUDIO CORPORATION (“NILES”) WARRANTS ITS ACTIVE PRODUCTS (THOSE REQUIRING AC OR BATTERY
POWER) TO THE ORIGINAL PURCHASER TO BE FREE OF MANUFACTURING DEFECTS IN MATERIAL AND
WORKMANSHIP FOR A PERIOD OF TWO YEARS FROM DATE OF PURCHASE.
THIS WARRANTY IS SUBJECT TO THE FOLLOWING ADDITIONAL CONDITIONS AND LIMITATIONS. THE WARRANTY
IS VOID AND INAPPLICABLE IF NILES DEEMS THAT THE PRODUCT HAS BEEN USED OR HANDLED OTHER THAN IN
ACCORDANCE WITH THE INSTRUCTIONS PROVIDED BY THE MANUFACTURER, INCLUDING BUT NOT LIMITED TO
DAMAGE CAUSED BY ACCIDENT, MISHANDLING, IMPROPER INSTALLATION, ABUSE, NEGLIGENCE, OR NORMAL
WEAR AND TEAR, OR ANY DEFECT CAUSED BY REPAIR TO THE PRODUCT BY ANYONE OTHER THAN NILES OR AN
AUTHORIZED NILES DEALER.
TO OBTAIN WARRANTY SERVICE, TAKE THE UNIT TO THE NEAREST AUTHORIZED NILES DEALER, WHO WILL TEST
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IF THE ABOVE CONDITIONS ARE MET, THE PURCHASER’S SOLE REMEDY SHALL BE TO RETURN THE PRODUCT TO
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TO THE EXTENT PROVIDED (OR PROHIBITED) BY APPLICABLE LAW.
SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES,
SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND
YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE.
FOR THE NAME OF YOUR NEAREST AUTHORIZED NILES DEALER CONTACT:
NILES AUDIO CORPORATION, P.O. BOX 160818, MIAMI, FLORIDA 33116-0818.
Please fill in your product information and retain for your records.
Model______________________ Serial No.___________________ Purchase Date________
4
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©2005 Niles Audio Corporation. All rights reserved. Niles, the Niles logos and
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