Rain Dance EX1200 - Manual (Page 11)

11
ULTRABASS PRO EX1200
dependent on the program material. The setting of the SUBHARMONICS switch is dependent
on the capabilities of the loudspeaker or subwoofer system. The setting of the BASS MODE
control is dependent on you, the listener.
Most important rule is to take familiar material and experiment at home or before actually use to get the feel of
the ULTRABASS PRO and what the unit can do for you.
2.2 Systems with Subwoofer
Fig. 2.2: The ULTRABASS PRO in a system with subwoofer
In this application, the low-range frequencies are reproduced both by the main speakers and by an additional
subwoofer. A subwoofer is a special loudspeaker for the transmission of low-frequency signals and serves as
an additional loudspeaker to improve the system response in the bass range.
For this purpose, the ULTRABASS PRO is equipped with an additional subwoofer output, which only provides
the original low-range frequencies and the newly generated subharmonics within a frequency range from 15 to
90 Hz. The subwoofer output is a mono output, since low-frequency signals contain virtually no directional
information. Nevertheless, the subwoofer should be positioned centrally to guarantee constant loudness in the
dispersion area.
Since in this application the entire low-frequency range is also reproduced by the main speakers, it should be
ensured that the low-range loudspeakers are not overloaded.
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When using a subwoofer with full range speakers, problems can rise in which the speakers
and the subwoofer cancel each other out at certain frequencies and positions. To check this,
walk around the room and listen to the difference between X-OVER switched on and off.
2.3 Multiway Active System
We talk of an active system, if the frequency spectrum is split up into several different ranges, and if specific
loudspeakers are used to reproduce just one selected range from the audio spectrum. Active operation is
particularly useful in large-scale sound systems found in discotheques, cinemas and theatres etc. The
following illustration shows the basic setup for multiway active operation.
The signal is routed from the mixer (or from any other sound source) to the ULTRABASS PRO. By activating
the X-OVER switch, all frequencies below 70 Hz are filtered out and are reproduced by a subwoofer. The
remaining signal is routed via the satellite outputs of the ULTRABASS PRO to the subsequent crossover
networks of the active system, where it is split up into a low and high-frequency range. The crossover is used
to split up the remaining frequency bands even further, and can be omitted in less complex systems using
passive crossovers.
2. APPLICATIONS