Martin Audio WLXGS User Manual download pdf (Page 26)

Island stages (not shown)

Island stages are simply four-sided versions of examples 3 and 5 and should be aligned using the same

process.

Tutorial on spaced systems

Whenever two or more loudspeaker systems are fed with the same signal and their coverage overlaps, sound

addition and subtraction will take place depending on the listener’s position.

In the following example, the off-axis listener may hear delayed sound from the right hand system.

The two loudspeakers are driven in phase (both were +ve just before the instant shown) but the extra distance

travelled by the second (R) signal causes it to be out of phase at the listener position at that particular

frequency (R is -ve while L is +ve).

Reflections

Remember that a strong side wall reflection will act like a second source and the direct and reflected signal

will combine as if they were two sources.

The following illustration shows what will happen. The direct signal will combine with the reflected signal as

if it were a phantom source in the position shown.

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Martin Audio WLXGS User Manual Page 26