Cloud Electronics CX2300 - Manual (Page 5)

3 Installation
3.01 Installation notes for the experienced installation engineer
The Cloud CX2300 is a stereo three way active crossover designed primarily for use as
part of a professional sound system. The use of plug-in fixed frequency filter cards and
the supplied anti-tamper cover provides a high level of security and helps to preserve the
control settings and system reliability. The unit can be used in the two way mode if
required by using one filter card and positioning the PC mounted switch in the two way
mode (see section 4.01).
The CX2300 would normally have been supplied as a fully tested unit with the filter cards
fitted at the factory. For details of the crossover frequencies, see the documentation that
was supplied with the unit or alternatively, details are given on the plug-in cards.
For optimum performance and low noise operation, we strongly advise the use of
balanced interconnections with high quality XLR type connectors and two core screened
cables. If you experience low frequency 'hum loops' we suggest that you connect the
cable screen at the input end (amplifier) only and any common mode signal should be
rejected.
The CX2300 should be rack mounted close to the system power amplifiers but care
should be taken to avoid mounting the unit in close proximity to any power amplifier which
may radiate a high magnetic field from the core of its power transformer. It is good
practice to distance the line level wiring from the speaker wiring.
The CX2300 should be connected into the audio chain between the full range signal
processing equipment (such as mixers, equalisers and compressors etc) and the power
amplifiers.
When setting up the sound system, we suggest that the CX2300 level controls are set
before any other equalisation adjustments are made. The 20Hz high pass filter is
provided to protect speakers from excessive cone excursion in reflex enclosures but may
not be required if similar filters are present in other equipment (Cloud CXF & CXM mixers
have fixed 20Hz high pass filters).
3.02 Mounting
The CX2300 is designed for standard 19" rack mounting and occupies 1U of rack space.
Avoid mounting the unit directly above or below power amplifiers or power supplies that
radiate significant amounts of heat and strong magnetic fields. Fibre or plastic washers
may be used to prevent the front panel becoming marked by the mounting screws.
3.03 Audio Connections
Always use balanced interconnections wherever possible using high quality 2 core
screened cable. The wiring convention is: pin 2 hot (+ phase), pin 3 cold (- phase) and pin
1 signal ground. The shell of the XLR type connector is connected to the chassis (see
section 5.04 'Signal connections and EMC').
The CX2300 is designed as a stereo active crossover and the front panel controls and
internal circuitry operate as a two channel stereo device. If the audio system is configured
for mono operation, only one channel should be used.