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Stand-by / On Indicator1.
The LED indicates whether the unit is in stand-by mode or operational. It will be illuminated red when in
stand-by, and green when operational
Crossover Frequency Control2.
The crossover frequency control only operates when the low pass filter switch (refer to section 3.) is in the ‘In’
position. This control feature is used to set the upper frequency limit (low pass) of the AW-12. The crossover
control should be set in accordance with the size or bass output of the main/satellite speakers. Refer to the
chart below as a guide to setting the crossover frequency control to the optimum position. Much will depend
on the correct low frequency response of the main speakers and their position in your room. Experimentation
is advisable.
Low Pass Filter Switch3.
When set to the ‘In’ position the crossover frequency control (section 2) is activated and can be adjusted
from 40Hz to 120Hz using the crossover frequency control. When set to the ‘In’ position it can be used with
an amplifier that does not have a dedicated subwoofer or LFE output, such as a stereo 2-channel amplifier.
If the amplifier or AV processor has a dedicated LFE or subwoofer output, the Low pass filter switch should
be set to the ‘Out’ position. The low pass filter will then be set by the AV amplifier’s internal filter. This should
be set in accordance with the amplifier or AV processor user guide.
Phase Control Switch4.
The Phase Control is used to synchronise any delay between the AW-12 and main/satellite speakers. When
the AW-12 is in phase with the main/satellite speakers the sound should be full bodied. Sit in a normal
listening position whilst adjusting the phase switch. Help from another person may be required in order to do
this easily. When set correctly the location of the subwoofer should be almost undetectable. Experimentation
is advisable in order to achieve optimum results. However it should be noted that in most cases the phase
control switch should be set to 0 degrees, especially when using a digital AV processor or AV receiver
amplifier.
Power Mode Switch with On-Auto-Off Facility5.
The Power Mode Switch has three positions: ‘On’–‘Auto’–‘Off’. With the switch in the ‘On’ position, the
subwoofer is permanently switched on under all conditions. In the ‘Auto’ position the subwoofer will
automatically switch on when an input signal is received and will remain on until no signal is received for
around 15-20 minutes, the AW-12 will then switch into standby mode until a signal is received once more.
When the switch is in the ‘Off’ position the subwoofer will not function.
12 Volt Trigger Input ~ Centre Pin = +12Vdc6.
For external power control from AV amplifier/ receiver to the AW-12. Monitor Audio recommend using this
function and a lead is supplied. This 12 volt signal is supplied by the AV amp/receiver and tells the AW-12
to turn on from standby mode. This allows a more accurately controlled auto on/off function, and is far more
energy efficient. When using this method of connection, it does not matter what position the Power Mode
Switch (5) is in, for it to function correctly.
RCA Line Level Inputs (Left & Right)7.
This is the only method of signal input connection to the AW-12. When using a stereo amplifier system,
connection can be provided by a pair of high-quality signal cables from the pre-out section of an amplifier. If
a digital AV processor or AV receiver/amplifier is to be used, a single cable can be connected from the ‘sub
out’ or LFE connection on the amplifier to the RCA input connection on the AW-12 labelled ‘R’. The RCA
input marked ‘L’ in this case will remain unused. Note: - cable lengths should not exceed 10 metres to avoid
interference from other electrical appliances.
Type of Main Speaker Monitor Audio Product
Crossover Control
Setting
Large floor-standing speaker PL300; GS20/60; RS6/8; BR6 40-60 Hz
Small floor-standing speaker RS5; BR5; R270 50-70Hz
Large stand-mount/ bookshelf speaker PL100; GS10 50-80 Hz
Small stand-mount/ bookshelf speaker RS1; BR1/2; R225/250; AX40/50 60-90 Hz
Small satellite speaker R45/90/180; AX10 80-120 Hz
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