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Digital Signal Processing
For full-range passive systems, the internal crossover/equalizer network sends low frequencies to the woofer and high
frequencies to the compression-driver/waveguide combination. In addition, the network tailors the frequency response and
levels of each individual driver so the overall frequency response of the loudspeaker is essentially flat over its design operating
range.
Once the ECU system
Once the EVU systems is installed in its venue, a DSP (Digital Signal Processor) is used to adjust the in-room frequency
response, based on the specifics of the venue. In addition, the DSP should be used to provide the high-pass filters
recommended to protect the EVU system against overdrive at frequencies below their operating range, failure to do so could
damage the low-frequency drivers if fed high-level signals below the system's operating range. The recommended high-pass
filter frequencies for infrasonic protection of EVU system is shown in Table 3.
Recommended High-Pass Filter Frequencies
TABLE 3.
Model Number
EVU-1062/95
EVU-1082/95
EVU-2062/95
EVU-2082/95
Recommended High-Pass
Frequency (minimum)
90Hz; 24dB Per Octave
90Hz; 24dB Per Octave
90Hz; 24dB Per Octave
90Hz; 24dB Per Octave
CHAPTER 2
Installation
15
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