Cloud Electronics CX2300 - Manual (Page 8)

CX2300 I NSTALLATION AND OPERATION MANUAL 7
both left and right channel. Operating each band in isolation can be very revealing if you
wish to focus your attention on a particular driver(s).
4.05 The Gain Controls
All three bands have their own stereo gain control with a range of gain from a centre unity
position (0dB) to -12dB of attenuation in the anti-clockwise position and up to 6dB of gain
in the clockwise position. When setting up the sound system, all equalisation controls
should be in the flat position, including any Graphic Equalisers.
Using a pink noise source, the system should be set up using a spectrum analyser and
the level controls should be adjusted by leaving the LF gain in the centre (0dB) position
and adjusting the mid and HF gain controls to give a response as close as possible to a
falling response of around 3dB/octave as the frequency increases. Fine adjustments
should then be made via the system equaliser.
5 Circuit Description
5.01 Schematic diagram
5.02 The Audio Path
Both left and right input circuits feature an electronically balanced input stage with a gain
of -6dB which feed a bandpass filter with a switchable 20Hz highpass section and a fixed
50kHz lowpass filter. The filter output is routed to the 'in-phase' side of the phase invert
switches and the same signal is inverted and fed to the other side of the phase invert
switches. The output of these switches is connected to the three variable gain stages
including the mute switches. The low frequency section then routes the signal through the
low pass section of the low frequency card to the balanced output stage which has a gain
of 6dB. The mid frequency section feeds the signal through the high pass section of the
LF Card and then through the low pass section of the HF Card before reaching the
balanced output stage. The high frequency section uses the high pass section of the HF
Card and its balanced output stage.