AUSTRALIAN MONITOR AMIS23X User manual

Clever Features, Contractor Friendly
AMIS23X
Stereo 2-way/Mono 3-way crossover
Installation
And
Operation Manual

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Introduction
The Australian Monitor Installation Series AMIS23X is a one rack unit, fourth
order Linkwitz-Riley electronic crossover. The AMIS23X can be configured as
either a stereo two way or a mono three way crossover. Featuring clip LED
indication per band per channel, frequency range selector switch, CD horn
boost switch & polarity reverse switching, the AMIS23X is an extremely well
featured crossover at a contractor friendly price.

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Front Panel
1. Power Switch
This switches the mains power “on” to the unit.
2. Channel 1 Crossover Section
This section refers to the controls for channel one. This section is duplicated
for channel 2.
1 2
4 5 6 7 8 9 10
3
2

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3. Clip LED’s
These LED’s indicate that the high range or low range signals are clipping
& entering distortion. Occasional flickering of these LED’s is acceptable
but if the LED remains on continuously, the level should be turned down to
avoid distortion.
4. Input Level.
This controls the input level of signal being fed to each channel.
5. Low Mute.
This switch will mute the low frequency band signal output for each
channel.
6. Low (lo) Level.
This controls the level of the low frequency band output of each channel.
7. Range Selection Switch
This switches the frequency value of the frequency control (8) from the
frequency shown on the front panel when the switch is the “off” position
to 10 x the frequency shown when in the “on” position.
8. Mid (lo/Mid) Frequency.
This will determine the crossover frequency between Low frequencies &
High frequencies for each channel when used in 2 way stereo mode. In 3
way mono mode this control will determine the (Lo/Mid) crossover point &
the corresponding Channel 2 control will determine the (Mid/Hi) crossover
point.
9. Hi Mute
This switch will mute the Hi frequency band signal output for each
channel.
10.High Level.
This controls the level of the high frequency band output of each
channel.

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Back Panel
1. Channel 2 High output XLR
Channel 2 XLR high frequency output/ Mono 3 way high frequency
output.
2. Channel 2 High output Jack
Channel 2 Jack high frequency output/ Mono 3 way high frequency
output.
3. Hi Phase.
This switch reverses the polarity of the high frequency output.
4. Channel 2 Low output XLR
Channel 2 XLR low frequency output/ Mono 3 way mid frequency output.
5. Channel 2 Low output Jack
Channel 2 Jack low frequency output/ Mono 3 way mid frequency
output.
6. CD Boost Switch.
This switches in a constant directivity horn equalization circuit. This is used
with horns that require a high frequency boost. This boost is +3 dB @ 3.5kHz
rising 6dB per octave to 22.5kHz. If constant directivity horn equalization is
required engage this switch. Consult your horn manufacturer to determine
if this equalization is required.
7. Mode Mono/stereo.
This switch will determine if the AMIS34X will operate in 2 way stereo or 3
way mono configuration. The switch “in” is 3 way mono mode & switch
“out” is 2 way stereo mode.
10
1
2
3
4
5
6
7
8
911
12
13
14
15
16
17 18
19

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8. Channel 2 Input XLR
This input accepts a balanced line level signal in 2 way stereo mode. This
input is not used in 3 way mono mode.
9. Channel 2 Input Jack
This input accepts a balanced line level signal in 2 way stereo mode. This
input is not used in 3 way mono mode.
10. Channel 1 High output XLR
Channel 1 XLR high frequency output. This is not used in Mono 3 way
mode.
11. Channel 1 High output Jack
Channel 1 Jack high frequency output. This is not used in Mono 3 way
mode.
12. Hi Phase.
This switch reverses the polarity of the high frequency output.
13. Channel 1 Low output XLR
Channel 1 XLR low frequency output/ Mono 3 way Lo frequency output.
14. Channel 1 Low output Jack
Channel 1 Jack low frequency output/ Mono 3 way Lo frequency output.
15. CD Boost Switch.
This switches in a constant directivity horn equalization circuit. This is used
with horns that require a high frequency boost. This boost is +3 dB @ 3.5kHz
rising 6dB per octave to 22.5kHz. If constant directivity horn equalization is
required engage this switch. Consult your horn manufacturer to determine
if this equalization is required.
16. Channel 1 Input XLR
This input accepts a balanced line level signal in 1 way stereo mode. This
input is the input used in 3 way mono mode.
17. Channel 1 Input Jack
This input accepts a balanced line level signal in 2 way stereo mode. This
input is the input used in 3 way mono mode.
18. Voltage Selector Switch
This switches the correct voltage for your part of the world.

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19. Fuse Holder.
The AMIS23X has a 500mA mains voltage fuse.
Modes of Operation
2 Way Stereo
When using the AMIS23X in 2 way stereo mode, firstly ensure the Stereo/Mono
Mode switch (7) is set to the correct position (switch “out”), then simply patch
the left line level output signal into input 1 (16 or 17) & the right line level
output signal into input 2 (8 or 9). Connect low output 1 (13 or 14) & low
output 2 (4 or 5) to your low frequency amplifiers. Connect the Channel 1
high output (10 or 11) & the channel 2 high output (1 or 2) to your high
frequency amplifiers.
3 Way Mono
When using the AMIS23X in 3 way mono mode, firstly ensure the Stereo/Mono
Mode switch (7) is set to the correct position (switch “in”), then simply patch
the line level output signal into input 1 (16 or 17). Connect low output 1 (13 or
14) to your Low frequency amplifiers, connect low output 2 (4 or 5) to your
mid frequency amplifiers & connect high output 2 to your high frequency
amplifiers. In this mode ensure Channel 1 Range Selection Switch (7) is set to
X1 & Channel 2 Range Selection Switch (7) is set to X10,& that both Channel
2 High Level (10) & Channel 2 Input Level (4) are set to ‘0’.
AMIS23X Specifications
1. Frequency Range; x1: 80Hz – 920 Hz
x10: 800Hz – 9.2 kHz
2. Frequency Response; 20 Hz – 20 kHz
3. S/N Ratio; Low Frequency Output @ 0dB <-106dBu
High Frequency Output @ 0dB <-97dBu

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