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the power amplifier which will power the main drivers of the mid-top cabinets and the HIGH outputs are connected to the inputs of the power
amplifier which will drive the high frequency drivers in the mid-top cabinets
Connect the crossover to mains power via the supplied IEC lead, ensuring the supply voltage is correct.
There may be slight variations from these set-ups but all follow the same basic principles.
Operation
It may help to know the frequency responses of all speaker components in the system or alternatively, crossover setup can be done by ear. The
main parameters are the crossover frequencies and gain amounts for each output.
Select the MODE that the crossover is to be used from the buttons on the rear panel. Each mode gives controls different parameters, so care
must be taken to read the control’s function printed on the front panel for the given mode.
If tri-amped or quad-amped systems are used, the Crossover frequency multiplier should be pressed in for MID/HIGH or HIGH-MID/HIGH
crossover points. This causes the frequency control to operate at a much higher frequency (10x) which is more suited to the division between
mid and high frequency drivers.
With all amplifiers switched off, turn down all GAIN controls and switch on the crossover. Switch on amplifiers and turn up the volume of each
output. Play the signal from the sound source (mixer) through the crossover and gradually increase the gain controls of each section. Gradually
rotate the XOVER FREQ (crossover frequency) control for LOW/HIGH or LOW/MID or LOW/LOW-MID until the desired bass character is
achieved. This is the control that determines the highest frequencies that will be fed into the sub cabinets. Lower crossover settings will need
higher gain settings to compensate for frequencies that are not fed into the sub cabinet (filtered out).
Repeat the crossover frequency setting process for LOW-MID, MID, HIGH-MID and HIGH frequencies (where appropriate) adjusting the
crossover frequencies to suit each driver and gains to balance the range of frequencies.
Occasionally, frequencies from some cabinets in stereo setups can have opposing phase characters. Also, some drivers may sit physically
further back from others. This can cause cancellation of frequencies. To deal with this, the Citronic crossovers have Phase switches, which can
be pressed in to invert the phase of the signal (push becomes pull and vice versa). This can be tested by trial and error to hear if pressing the
switch in has a beneficial effect to the volume level of that particular frequency.
To further help avoiding phase cancellation, the LOW can be “summed” to a mono signal (LF SUM), eradicating differing signals in the lower
registers of a stereo signal.
Remember to turn down amplifiers and switch off prior to powering down the crossover to avoid loud noises in the sound system.
SPECIFICATIONS
CX34
CX23
Power supply
115/230Vac selectable 50/60Hz (IEC)
Input impedance: balanced
40kΩ
50kΩ
Input impedance: unbalanced
20kΩ
25kΩ
Output impedance
220Ω
200Ω
Crossover ranges: stereo
50Hz-5kHz;750Hz-7.5kHz
45-960Hz (switchable 10x) or 450Hz-9.6kHz
Crossover ranges: mono
50Hz-5kHz;750Hz-7.5kHz; 2kHz-20kHz
45-960Hz (switchable 10x) or 450Hz-9.6kHz
Filter slope
18dB/octave
24dB/octave
Frequency response
20Hz-25kHz +0/-1dB
20Hz TO 20KHz, +0/-0.5dB
Signal to noise ratio
>90dB
THD
<0.006% @ +4dBu, 1KHz
<0.004% @ +4dBu, 1KHz
Dimensions
482 x 170 x 44 mm
482 x 170 x 44 mm
Weight
2.5Kg
2.5kg
No function and Power switch LED is not lit
Ensure mains voltage is correct (check selector) and connected properly
Ensure front panel power switch and mains outlet switch are on
Power is on but no audio output
Check XLR leads are OK and connected properly
Check that INPUT and OUT GAIN controls are not turned fully down
Check that inputs and outputs are connected the correct way around
Check that LOW out is not connected to amp for mid-high cabs in error
Check that MID or HIGH out is not connected to amp for sub cabs in error
Distorted output
Reduce INPUT and HIGH/MID/LOW OUT Gain controls
Lower XOVER FREQ for sub cabinets
Check frequency multiplier switches are set correctly
Output is very low level
Check XOVER FREQ is set correctly for each output
Test phase switches of different outputs to hear if they need to be inverted
Increase Gain control(s) to compensate
Note: for further troubleshooting, refer equipment to qualified service personnel for testing
© Citronic 2011
4


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