1.) Low-Level inputs (Left/Right)
RCA- and balanced XLR style jacks what will accept standard line level inputs from a pre-amp level source. They
will accept a stereo signal and internally combine it into mono. Both left and right input jacks must be
connected to the source in order to drive the amplifier to full output.
2.) Low-Level outputs (Left/Right)
This balanced XLR output allows the low level input signal to be daisy chained through the internal preamps to
other amplifiers or powered satellites with no alternation (EQ) to the original signal.
3.) Level
This control will match the amplifier’s input sensitivity to the output of the pre-amp source. If the source 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 level knob can be considered to be the “volume control” for the
subwoofer or full range system.
4.) Bypass
This two position (ON or OFF) switch gives in ON mode full frequency to the amp which can be used as a full
range amplifier (subsonic- and phase switch can still be used).
In OFF mode will the signal supply the sweep control and the amp is suitable for subwoofer system.
5.) HPF
This two position (ON or OFF) switch gives in ON mode a slight decreasing of the treble from approx 200 Hz and
up (only in bypass ON mode).
6.) Sweep
This control works only in bypass OFF mode and is used to establish the highest frequency that the subwoofer
will reproduce and has a range between 30 to 200Hz with slop 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 at
40, 60, or even 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 experience when all speakers are playing in the
same range. This can be helpful when integrating the subwoofer with the rest of the system and with the room.
7.) LPF
This two position (ON or OFF) switch gives in ON mode a slight decreasing of the bass from approx 40 Hz and
down. It is useful to remove the extremely low disturbing frequencies (only in bypass ON mode).
8.) Phase
This two position (NOR = 0
°
and REV = 180
°
phase) switch helps to compensate for different in the acoustical
and electrical characteristics between the subwoofer or full range system and the main system speakers. The
relative locations of speaker in the system can cause significant disturbances in speaker in the system due to
time delay issues, or the destructive phase interferences that can occur at certain frequencies. The use of this
switch in conjunction with altering the location the location of the subwoofer or full range speaker can have a
dramatic effect on system integration. The “NOR” setting would be considered the normal or default setting,
but be sure to experiment during system set-up.
This feature works regardless of the bypass mode.
9.) Subsonic
This four position (OFF, 20, 35 and 50 Hz) switch
is very useful to eliminate disturbing low frequencies. The best
is to experiment for best results. This feature works regardless of the bypass mode.
10.) Stereo-Mono
This two position (Stereo-Mono) switch gives in STEREO mode +3 dB and in MONO mode can the amp only be
supplied by the left inputs.
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