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For Best Results and to Minimize Cross-Over Interference From Other Electronic Devices,
DON'T
install in electrical boxes with 120V household wiring.
DON'T
install near other wall controls, including light switches and dimmer switches.
DON'T
install near a telephone or intercom master.
INSTRUCTIONS
FOR
IMPEDANCE-
MATCHING
VOLUME
CONTROLS
Introduction
By
matching
the
minimum
output
impedance
of
the
receiver
or
amplifier
and adjusting volume,
™
M&S
impedance-
matching
volume
controls eliminate the
need for speaker selector
boxes or other impedance
matching equipment.
Impedance-Matching
Volume Controls Only
Determining the
Jumper Setting for
NUMBER OF
Impedance Matching
8-OHM PAIRS
1
To protect the amplifier
2
from
overload
and
3
damage, the jumper must
4
be set in a position that
5
6
correctly multiplies the
7
impedance of the speaker
8
system to a level that is
equal to or greater than
the impedance of the
amplifier. For reference:
™
All M&S
Ceiling and
In-Wall speakers are 8-
Ohm.
Step #1
Determine the amplifier's
minimum
impedance.
(The amp's minimum
impedance is usually
found following Wattage
and Frequency Response
in
the
amplifier's
specification page of the
manual. It may also be
listed on the back panel
of the amplifier near
the speaker terminals).
Impedance is measured
in Ohms (8- and 4-ohm
systems are common).
Step #2
Determine
the
total
number of speaker pairs.
Step #3
Use the chart below to
determine the correct
.
jumper settings
Step #4
Set the jumpers.
Use The Following Guidelines When Planning Installation:
IMPEDANCE-MATCHING WIRING
INSTRUCTIONS
Electrical Boxes and P-Rings
The mounting depth of the volume control is 2
the face plate to the back of the control. You must use an
extended depth box to accommodate the volume control.
A P-Ring can be used as an alternative if local building
codes allow.
Wiring Instructions
For best results, use M&S 16-gauge stranded MS16X5
copper speaker wire. Never use solid-core, aluminum or
"Romex" type wire with volume controls.
Step #1
Strip about
1
/
4
insulation off the ends of all
wires. Twist the exposed ends
to eliminate loose strands.
JUMPER
Step #2
SETTINGS
Connect the leads from the
2X
Receiver/Amplifier to the
2X
volume control connector
4X
4X
labeled INPUT. Insert the
8X
LEFT L(+) and L(-) into
8X
the corresponding connector
8X
8X
openings. Tighten the screws
firmly, making sure that the
Jumper Settings
exposed wire is engaged, not
Cutaway
the insulation!
Note:
Step #3
Be sure every
Repeat
process
jumper setting
connecting R(+) and R(-)
is set the same
throughout the
wires from the amplifier.
system!
Step #4
Connect the speaker wires to the connector labeled
OUTPUT. Observe channel and polarity output.
Step #5
Install the completed assembly into the junction box.
Insert carefully to reduce strain on the connectors. If
necessary, pre-dress the wires for easiest mounting.
DON'T
install in a bathroom or spa, or near a jacuzzi.
DO
use only a power limited listed or recognized stereo amplifier to power this product
(70 Volt Peak Maximum / 20Hz-20kHz).
7
/
" from
8
" of the
while
Speaker Pair
Receive/Amplifier
Output
Input
Volume Control
VOLUME
CONTROL
OPERATION
1. Make sure the amplifier
or receiver is OFF and
set the amp volume to
minimum.
2. Set the volume control
volume to maximum
(fully clockwise).
3. Turn on the amplifier or
receiver and select a
music source, such as
radio tuner or CD
player.
4. Slowly turn up the
amplifier or receiver
volume and set it to a
comfortable
(not
maximum)
listening
level. BE CAREFUL
N O T
T O
O V E R D R I V E
YOUR AMPLIFIER.
If the sound becomes
muddy or distorted,
you have reached the
limit
of
your
amplifier's
volume
capacity and should
quickly reduce t h e
volume
to
avoid
damaging
your
speakers.
™
5. Use
the
M&S
volume
control
to
adjust the volume of
the speakers to the
desired listening level
in each room.
6. Turn off the speakers in
a room by turning the
knob on the volume
control completely
counter-clockwise.
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