Specifications

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Figure 4.2b Audio Sources Overview
Each output, including HI and VI-N, has a mixer with eight digital and six analog inputs. The input source and
decode options determine the active sources for the mixer.
Simplified Crossover Block Diagram
The following Figure 4.2c shows the details of the crossovers. The audio is split into high band and low band
components with high pass filter #4 and low pass filter #0. These are both 4th order Linkwitz-Riley filters. They are
followed by a series of parametric filters. The high band includes a pair of shelving filters (#7 and #8) to
compensate for the high frequency characteristics of the high frequency horn and the screen. Each band ends up
with a delay block. Individual band delays can be set as required. This block also includes a provision to flip the
phase in case a speaker is wired incorrectly.
In most installations, the user merely loads crossover settings from the supplied speaker library, and then adjusts
the output trims as required to compensate for amplifier gain differences and speaker efficiency differences.