C
ongratulations on your purchase of the M3 Mono Amplifier with Subwoofer Crossover System from Proficient Audio. The M3 has
been created to provide performance that is equal to the demands of today’s home-theater and distributed-audio installations,
and with proper use it will do so for many years to come. So, to get the very best from your M3 system, please read and under-
stand the instructions given in this manual. Any further questions can be answered by contacting our specialists at 1-877-888-
9004 or [email protected].
Points on System Design
The M3 Mono Amplifier with Subwoofer Crossover can be used in the context of any home theater or distributed audio system
and is optimized for use with the Proficient IWS10, inwall, passive subwoofer system. Accordingly, the M3 can be connected to any
preamplifier or receiver that has low-level (line out), speaker (high-level) or LFE outputs. In addition, the M3 has a pass-through
feature that allows the input signals to be fed out of the unit to other amplifiers or system components.
Installing & Operating the M3
Placement
• Place the amplifier with the feet resting on a level surface that is solid and free of obstructions.
• Place the amplifier in a well-vented area to provide proper cooling. If the place of installation has insufficient ventilation, such as
close-fitting cabinet or rack, the installation of a small fan can ensure proper airflow around the amplifier.
Precautions on Use of the Amplifier
• Do not block the ventilation holes on the top and bottom panels of the amplifier. Never place the unit on carpeting or similar
material.
• Do not place the amplifier in any orientation other than horizontal with its feet on the floor. Never place the amp on its side or
resting against the rear panel, where the terminals are located.
• Do not place the amplifier near a heat source.
• Do not place the amplifier or in an area that is subject to water infiltration or excessive humidity.
• The power supply might cause an audible hum in some components if they are placed near or next to the amplifier.
The Rear Panel
The rear panel of the M3 amplifier, as shown in Diagram 1, contains all the necessary terminals for connection to the subwoofer
and audio system.
Auto Sense Mode
The amplifier’s Auto Sense mode allows it to turn on or off in response to audio signals from the receiver or preamp, which are
received via its input connections.
NOTE:
The amplifier’s front power switch must be turned on for the Auto Sense mode to operate. Once the power is switched on,
Auto Sense mode automatically is activated. The “Active” LED on the front of the amplifier will not light up until an audio signal
is sensed. When a signal is received at the left/right line-level input jacks, the speaker input connectors or the LFE input jack, the
amplifier turns on. When the signal stops, the amplifier turns off following a brief period of silence. If you are going to be away for
an extended period, the main power switch should be turned off or the unit unplugged from the wall outlet.
Connecting the Subwoofer to the Amplifier
CAUTION:
Perform connections only when the amplifier is turned off.
NOTE
: It is essential that a minimum of 14-gauge speaker wire be used.
There is one output on the amplifier labeled Subwoofer Output: a positive and a negative three-way binding-post on the back of
the amplifier that facilitate connection in a variety of ways, including stripped wire, spade connectors, etc.
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