Sub-woofer Inputs and Controls (optional) - 18
The impedance “seen” by the full-range source amplifier will be that of the
connected speakers only.
4. Power input - This unit features a hardwired AC power cable and
externally-accessible fuse. It is supplied with an 0.75 A, 250V fuse
and USA type polarized 2-pin plug. This unit is not suitable for 230V
applications.
CONTROLS/INDICATORS
5. Power/Gain Knob (“Gain”) - This control will
match the amplifier’s input sensitivity to the
output of the pre-amp source. If the source
output has a variable control, we recommend
that the user spend a moment or two
determining the best balance between the two
controls. When a balance is found between
low noise, linear level control, and sufficient
level to drive the amp to the required output,
the gain knob can be considered to be the
“volume control” for the sub-woofer system.
To shut the sub-woofer amplifier off, turn the
control all the way to the left until it ‘clicks’.
6. Frequency Knob (“Freq”) - This control is
used to establish the highest frequency that
the sub-woofer will reproduce and has a
range between 60 to 180 Hz with a slope of
24 dB per octave. If you are using the system for music and your main
speakers have good bass capability, you could set the control to a fairly
low value, often between 60 and 100 Hz. If the main speakers are smaller
or do not have much bass output, set the control higher. Experiment with
the amount of “overlap” that you will experience when all speakers are
playing in the same range. This can be helpful when integrating the sub-
woofer with the rest of the system and with the room.
7. Power LED - When the power switch is moved to the “on” position, the
LED will illuminate green, and the amp will be in “On” mode. If the LED
is not illuminated, check that the amplifier is plugged into a power source
and that the “Gain” knob is not set to the “Off” position.
Optimal Gain Range
WARNING: It is possible to over-drive bass speaker with too
high of a GAIN setting. Damage to speaker may occur.
