ACO23/ACO234 Page
5
In 3
-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 3-way mode. LEDs are disabled for controls which are non-functional in this mode.
[1]
INPUT GAIN
Controls the input level with +/
- 12 dB of gain.
[9]
LOW CUT
Switch for selecting the 40 Hz high pass filter. An LED indicates the selection.
[2]
LOW/MID
Selects crossover point between LOW and MID frequencies.
[10]
X10 LED
Indicates that the LOW/MID crossover range is 450 Hz to 9.6 kHz.
[6]
MID/HIGH
Selects the crossover point between MID and HIGH frequencies.
[16]
X10 LED
Indicates that the MID/HIGH crossover frequency range is 450 Hz
to 9.6 kHz
[3]
LOW OUTPUT
Controls the LOW frequency output level with a range of
-
∞ to +6dB.
[11]
PHASE INVERT
Switch for reversing the polarity on the Low Output. An LED indicates that the phase is reversed.
[7]
MID OUTPUT
Controls the MID frequency output level with
a range of -
∞ to +6dB.
[17]
PHASE INVERT
Switch for reversing the polarity on the Mid Output. An LED indicates that the phase is reversed.
[8]
HIGH OUTPUT
Controls the HIGH frequency output level with a range of
-
∞ to +6dB.
[18]
PHASE INVERT
Switch for reversing the polarity on the High Output. An LED indicates that the phase is reversed.
[13]
MONO
LED indicating mono mode operation.
REAR PANEL CONNECTIONS
The mode switches on the back panel of the unit are used to select one of the three modes of operation in the ACO234
and one of two modes of operation in the ACO23
. There could be disastrous consequences
if the crossover were
improperly setup or the switches were mistakenly pushed during the regular operation of a sound system. Therefore
great care should be taken when setting these switches. There is a mode diagram on the back panel to help you
understand at a glance how this is done. The following steps should be taken in setting up your system:
• Know the loudspeaker manufacturer’s requirements
regarding the amplification needs of your particular speaker
system. Follow the
manufacturer’s guidelines carefully, as is not responsible for damage
relating to improper setup or
implementation of the ACO234-ACO23.
• Without any audio or power connections
in place, use the back panel
switches on the crossover to set it to the proper
mode of operation;
Either stereo 2-
way, stereo 3
-
way, or mono 4
-way for the ACO234
,
Or stereo 2-way or mono 3-way for the ACO23.
• Use the literature that came with your speak
er system to properly set up the mode of operation and crossover
frequencies to the manufacturer’s
specifications.
• There is one of the four possible mode button combinations for the
ACO234 which is marked “not valid”. Be sure you
have not selected this combination as the ACO234 will not operate correctly in this mode.
On the back panel of the ACO234
, there are markings to help you connect
the source devices and amplifiers to your
crossover. To operate the ACO234 in stereo 3-
way operation, follow the top row of markings horizontally
along the
length of the ACO234. For stereo 2-way operation of the ACO234
, use the second row of markings directly above the
connectors. For mono 4-way operation of the ACO234
, use the markings
directly below the connectors. The connectors
not used in the selected mode are marked “not used”. This designation applies only to
that mode
of operation.
ACO23
ACO234
