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Listeners in the 60º zone will hear the note at a reduced level and may be more aware of room reverberation
because the direct-to-reverberation ratio would be poorer for that note. Other notes would give different
effects.
In practice, these peaks and troughs can be smoothed out with additional fill systems.
Electronic steering
It is possible to “aim” ground-stacks towards distant raked seating or balconies or away from problematic
areas by electronically “tilting” the system using multi-channel digital delay lines.
The following illustration shows the basic schematic plus the staircase effect** (greyed out) produced by the
progressive increase in drive delay from bottom to top.
**Important Note:
The staggered stack (shown greyed out) illustrates the effect of electronic steering.
For safety reasons, never try to tilt or stagger a real subwoofer stack.
All material © 2007. Martin Audio Ltd. Subject to change without notice.