Meyer Sound 600-HP - Manual (Page 24)

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CHAPTER 5
phase shift differences between the loudspeakers and the
subwoofers. In addition, you should verify the delay time
between channels. Some DSPs may develop channel-to-
channel variations in delay when the DSP is near maximum
throughput, which becomes more likely as the number of
filters the DSP is using increases.
NOTE: Avoid using filters higher than 2nd
order. The additional phase shift introduced
deteriorates the impulse response and higher roll-off
does not improve crossover interaction.
NOTE: Some filters on the LD-3 and Galileo
are parabolic filters with minimal phase shift;
most commercially available DSP devices have no
presets to emulate these parabolic filters.
CAUTION: If the loudspeakers are going
to be driven directly from the DSP, verify
that the outputs of the processor have the driving
capabilities to drive the total load presented by the
loudspeakers connected to it. Please refer to the
Audio Input section of Chapter 3: Amplification and
Audio.
NOTE: When precise array design,
subwoofer integration, DSP and delay
systems, and compensation for acoustical condi-
tions all come into play, measurement and correc-
tion tools are a must. Meyer Sound’s SIM 3 audio
analyzer system and Galileo 616 (or a combination
of LD-1A/LD-2/LD-3 line drivers, CP-10 parametric
equalizers, VX-1 program equalizers, and signal
delays) are highly recommended.