Cloud Electronics CX2300 - Manual (Page 7)

2 Using a number 2 pozidrive screwdriver, remove the six screws which retain the
top panel in place.
3 Locate the two plug-in cards mounted on the mother board. The low frequency
card is nearest the power transformer.
4 Remove the two M3 machine screws which hold the plug-in card in place, then
withdraw the card vertically.
5 Replace the card with care, ensuring that the mounting holes align perfectly with
the threaded mounting posts.
6 Replace the top panel.
4 Operation and Controls
4.01 Two Way Operation
Whilst the CX2300 will be used predominantly in the three way mode, the unit can be
used on two way systems. In this mode of operation, just one filter card, the low
frequency card, is used and the mode switch (mounted on the PCB) should be in the 'two
way' mode. LED's on the front panel indicate the mode of operation. When operating in
the two way mode, the high frequency output is used and the middle frequency output is
muted. The two bands are controlled on the front panel by the low frequency and middle
frequency sections with the high frequency section inoperative.
4.02 Do I use the 20Hz high pass filter ?
The ported reflex bass enclosure is used extensively in professional sound systems and a
characteristic of this design is that the cone of the LF driver is not loaded below the tuned
frequency of the enclosure and some form of excursion protection must be provided to
prevent the driver from possible physical destruction. The 20Hz high pass filter in the
CX2300 can be used to provide this protection at the rate of 18dB/octave. An additional
advantage of the filter is to help reduce acoustic feedback derived from turntable pickups
but only if the feedback occurs below 20Hz. Care must be taken to make sure that the
signal has not been processed by other filters in the signal chain (the Cloud CXM & CXF
mixers both have fixed 20Hz high pass 3 pole filters) unless double protection is desired.
4.03 The Invert Switch
It is often not practical to align the diaphragms and voice coils of the many drivers such
that they are all coincident and in addition, both equalisation and filter circuits can cause
small amounts of phase shift. The phase reverse switch will introduce a phase shift of 180
degrees and the most suitable position of the switch is best found by subjective tests
when the system is set up.
4.04 The Mute Switch
This facility would normally be used during initial testing/setting up or perhaps when fault
finding. Operating the mute switch will totally silence the respective frequency band on