ACO23/ACO234 Page 4
Channel One and Channel Two functions are identical in the stereo mode. LEDs are disabled for controls which are not
functional in this mode.
[1] & [7]
INPUT GAIN
Controls the INPUT level with +/
- 12 dB of gain.
[13] & [20]
LOW CUT
Switch for selecting the 40 Hz high pass filter. An LED indicates the selection.
[2] & [8]
LOW/MID
Selects crossover point between LOW and MID frequencies.
[14] & [21]
X10 LED
Indicates that the LOW/MID crossover frequency range is 450 Hz to 9.6 kHz.
[3] & [9]
MID/HIGH
Selects crossover point between MID and HIGH frequencies.
[4] & [10]
LOW OUTPUT
Controls the Low Frequency output level with a range of
-
∞ to +6 dB.
[15] & [22]
PHASE INVERT
Switch for reversing the polarity on the Low Output. An LED indicates the selection.
[5] & [11]
MID OUTPUT
Controls the Mid Frequency output with a range of
-
∞ to +6 dB.
[16] & [23]
PHASE INVERT
Switch for reversing the polarity on the Mid Output. An LED indicates the selection.
[6] & [12]
HIGH OUTPUT
Controls the High Frequency output with a range of
-
∞ to +6 dB.
[17] & [24]
PHASE INVERT
Switch for reversing the polarity on the High output. An LED indicates the selection.
[19]
STEREO
LED indicating stereo mode operation.
MONO 4 -WAY MODE
In 4
-way mono operation the controls are marked ABOVE the horizontal blue line. Front panel controls not described in
this section are not active in mono 4-way mode. LEDs are disabled for controls which are non-functional in mono 4-way
mode.
[1]
INPUT GAIN
Controls the input level with +/
- 12 dB of gain.
[13]
LOW CUT
Switch for selecting the 40 Hz high pass filter. An LED indicates the selection.
[2]
LOW/LOW-MID
Selects crossover point between LOW and LOW-
MID frequencies.
[14]
X10 LED
Indicates that the LOW/LOW
-
MID crossover frequency range is 450 Hz to
9.6 kHz.
[3]
LOW-MID/HIGH-MID
Selects the crossover point between LOW-
MID and HIGH
-
MID frequencies.
[9]
HIGH-MID/HIGH
Selects the crossover point between HIGH
-
MID and HIGH frequencies.
[4]
LOW OUTPUT
Controls the LOW frequency output level with a range of
-
∞ to +6 dB.
[15]
PHASE INVERT
Switch for reversing the polarity on the Low Output. An LED indicates the selection.
[5]
LOW-MID OUTPUT
Controls the LOW-
MID frequency output
level with a range of -
∞ to +6 dB.
[16]
PHASE INVERT
Switch for reversing the polarity on the Low-Mid Output. An LED indicates the selection.
[11]
HIGH-MID OUTPUT
Controls the HIGH
-
MID frequency output level with a range of
-
∞ to +6 dB.
[23]
PHASE INVERT
Switch for reversing the polarity on the High-Mid Output. An LED indicates the selection.
[12]
HIGH OUTPUT
Controls the HIGH frequency output level with a range of
-
∞ to +6 dB.
[24]
PHASE INVERT
Switch for reversing the polarity on the High Output. An LED indicates the selection.
[18]
MONO
LED indicating mono mode operation.
ACO23 FRONT
PANEL
STEREO 2-WAY MODE
In 2
-way stereo mode the controls are marked BELOW the horizontal blue line.
Channel One and Channel Two functions are identical in the stereo mode. LEDs are disabled for controls which are non-
functional in this mode.
[1] & [5]
INPUT GAIN
Controls the INPUT level with +/
- 12 dB of gain.
[9] & [15]
LOW CUT
Switch for selecting the 40 Hz high pass filter. An LED indicates the selection.
[2] & [6]
LOW/HIGH
Selects crossover point between the LOW and HIGH o
utputs.
[10] & [16]
X10 LED
Indicates that the LOW/HIGH crossover frequency range is 450Hz to 9.6 kHz.
[3] & [7]
LOW OUTPUT
Controls the Low Frequency output level with a range of
-
∞ to +6dB.
[11] & [17]
PHASE INVERT
Switch for reversing the polarity on the Low Output. An LED indicates the selection.
[4] & [8]
HIGH OUTPUT
Controls the High Frequency output with a range of
-
∞ to +6 dB.
[12] & [18]
PHASE INVERT
Switch for reversing the polarity on the High Output. An LED indicates the selection.
[14]
STEREO
LED indicating stereo mode operation.
MONO 3 -WAY MODE
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