Operating Instructions
K&F NOMOS LS
KLING & FREITAG GMBH © 2016
Version 4.1
Page 12 of 20
6.2
Cardioid Arrays with NOMOS LS
The subwoofer NOMOS LS 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.
6.2.1
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:
3 x NOMOS LS horizontal
3 x NOMOS LS vertical
3 x NOMOS LS horizontal stacked
3 x NOMOS LS vertical stacked
When cardioid arrays are stacked on the floor, ensure that there is always a distance of at least
40 cm between each unit of 3.
6.2.2
LSBlocks for cardioid useController CD 44
The rear-facing subwoofer is controlled using the Controller CD 44 via LSBlock for cardioid
arrays for rear-emitting subwoofers. The front-facing subwoofers are controlled via LSBlock
for cardioid arrays for front-emitting subwoofers. The following cardioid LSBlocks are
available in the Controller CD 44:
Operation Mode of the NOMOS LS
Selected LSBlock (Controller CD 44)
'Cardioid Front', front-facing
NOMOS LS C-F
'Cardioid Rear', rear-facing
NOMOS LS C-R
