KLING & FREITAG K&F NOMOS XLS - Manual (Page 12)

User's manual K&F NOMOS XLS
KLING & FREITAG GMBH © 2014 Version 1.2 Page 12 of 21
5.4 Cardioid Arrays with NOMOS XLS
The subwoofer NOMOS XLS is designed so that it can be used as a cardioid system in an array
of three subwoofers, or in multiples of three.
A cardioid array results in an increase of sound pressure towards the front because of the
rear-facing subwoofer. In the rear area, on the other hand, the sound pressure is clearly
reduced.
With this, you achieve
• less unwanted sound on the stage
• low feedback
• simplified miking
• improved room acoustics with fewer reflections from the rear and side walls, or – when
flown – from the ceiling
• simplified adherence of sound emission limits and therefore less noise disturbance for
nearby residential areas during open air events.
5.4.1 Setup instructions for a cardioid array
To achieve a cardioid pattern, you must always have an array with 3 subwoofers - or a
multiple of 3 subwoofers - setup next to one another (3, 6, 9, etc.). In this set of three, the
middle one must be rear-facing while both other subwoofers are front-facing.
You can choose from the following options for cardioid and hypercardioid setups:
Unifilar drawing:
3 subwoofers horizontal
3 subwoofers vertical
3 subwoofers horizontal, stacked
3 subwoofers vertical, stacked