10
SUPER-X PRO CX2310
3. APPLICATIONS
+BEHRINGER accepts no responsibility for any damage or destruction of loudspeakers arising
from improper or incorrect use of the SUPER-X PRO and in particular from actions hich are in
contravention ith the clearly stated procedures given in this manual.
3.2 Setting the input and output levels
Both inputs offer a gain or loss of up to 12 dB. Normall , the output level on the mixing console and the input
sensitivit of the amplifiers are identical, i.e. 0 dB at the mixing console corresponds with 0 dB at the amplifiers.
This means that there is full control over the amplifiers. In this case the SUPER-X PRO should have no effect
on the s stem level and all input and output level settings should be set at 0 dB. Where e.g. a home recording
or disco console is being used with an operating level of -10 dBV but the amplifiers need +4 dBu for complete
control, then an additional gain of 12 dB must be provided between them. In this case the INPUT control of the
SUPER-X PRO should be set to the maximum.
The output levels of the single bands can be raised/lowered b as much as 6 dB. To achieve a linear frequenc
response in the s stem, all output levels should be adjusted with the help of an anal zer. To check the
crossover frequencies and levels, mute all outputs except for one, and pla back pink noise over the s stem at
an appropriate volume level. When ou now switch on the adjacent band, the level measured around the
crossover frequenc should go up b 3 dB. Repeat this process for all crossover frequencies.
3.3 Correcting proble s
Check the entire frequenc response of the s stem. Rooms have quite an impact on the frequenc response
of speaker s stems, due to resonance and various reflections, so ou cannot expect to achieve a linear
frequenc response right from the start. To achieve this, ou need an equalizer such as the ULTRA-CURVE
PRO DSP8024 or the ULTRA-GRAPH GEQ3102. Look for drop-outs around the crossover frequencies! If the
frequenc response is ver irregular, then it can make sense to grade adjust it using the frequenc crossover,
before using an equalizer (EQ). The errors in the crossover frequenc must then be as far as possible corrected
using the EQ.
If the loudspeaker diaphragms in a multi-wa s stem are not exactl aligned along a vertical axis, the var ing
distances between the sound source and the listener result in phase errors and cancellations (also known as
the comb filter effect). Particularl in the higher frequencies it is important, due to the shorter wavelengths, to
position the diaphragms above each other and not next to each other. The various t pes of construction used
in individual s stems (horns, bass reflex cabinets etc.) still give rise to run time differences, even where the
front sides of all s stems are aligned verticall above each other. In this case a run time correction must be
made b electronic means. This can be done b using a dela function. Run time differences can be compensated
b dela ing the frequenc bands over a range of milliseconds. This helps avoid loss of sound qualit , particularl
in the high tone ranges.
+Runtime correction is not the same as phase correction. If a speaker system has the same run
times then it also has the same phases (unless the polarity of a cable has been reversed).
Ho ever the opposite is not necessarily true.
3.4 Setting the crossover frequencies
The frequenc range from which the crossover frequencies can be selected, can be one of two rangesfrom 44
to 930 Hz and from 440 Hz to 9.3 kHz. To set the crossover frequencies, please first read the manufacturers
specifications for the individual loudspeaker components. To use the capacit of our s stem at its best ou
should set up the crossover frequencies in accordance with the frequenc diagrams on the individual loudspeaker
boxes. Further, the crossovers should not lie on peaks or drop-outs. Look for a range with the flattest possible
curve. If folded bass horns are being used, then the length of the horn path must also be taken into account,
since the run time displacements arising from differing long paths can also have a negative effect on the
frequenc development (see chapter 3.3).
+Never operate loudspeakers or horn drivers belo the limiting frequency specified by the
manufacturer!
