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.
+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.
