HK Audio LINEAR 9 Serie Manual página 7

• Rigging
You can fl y the XA models either from their built-in rigging points using
steel cables or chains and the AP-8 attachment or using the appropriate
rigging harness. They have specially reinforced rigging points with 2x8 mm
threads designed to accept the optionally available HK Audio TB-28N tilt
bracket.
The LINEAR 9 210 LTA can be fl own using the optionally available TB-210NQ.
It bolts into the MultiGrip handles. See the mounting instructions included
with the brackets for more on this.
• Clustering the LINEAR 9 210 LTA
The LINEAR 9 210 LTA has built-in, fast-mount hardware that makes it easy
to cluster two or more units.
When stacking speakers, place LINEAR 9 210 LTA units on the subwoofers
with their side panels touching. The rubber bumpers on one cabinet fi t it
into indentations in the neighboring wood cabinet to properly align the
two speakers on the horizontal plane. Fix the preconfi gured cluster in place
by screwing down the top cluster couplers to connect the neighboring
speakers:
You can also fl y one LINEAR 9 210 LTA or a cluster of two with the optional
TB-210NQ tilt bracket. If you want to fl y two speakers with this tilt bracket,
you have to additionally secure the cluster with the bottom cluster couplers.
This is mandatory.
To get the best audio results when clustering LINEAR 9 210 LTAs, you will
have to rotate the two adjacent horns to set them to a horizontal directivity
of 25°. The angles are clearly marked on the horns.
60°
Stand alone Clustering
(Preset 1) (Preset 2 / Preset 3)
Select the appropriate preset on the back of the speakers for the given type
of cluster.
4.2 LINEAR 9 118 Sub A / LINEAR 9 118 Sub BA
Deploy the LINEAR 9 118 Sub A as you would any other direct radiating
subwoofer. However, do not stack the bass bins when confi guring cardioid
setups. Instead, place them side by side, maintaining a distance of at least
one meter from walls.
Do not stack LINEAR 9 118 Sub BA subwoofers in cardioid setups. Instead,
place them upright and array them side by side. Maintain a distance of at
least one meter from walls for both cardioid setups.
You have two cardioid setups to choose from – Cardioid 1:1 and Cardioid 2:1.
A control on the back of the two subwoofers serves to select the
appropriate preset. See section 2,
L9 118 Sub A
Cardioid 1:1 Cardioid 2:1
Front
Cardioid
Cardioid
Front
2:1
Cardioid
Front
1:1
Both setups attenuate the rearward sound pressure level by up to 34 dB,
and boost the forward SPL around 2 dB.
Rear: Front:
–34 dB +2 dB
When is it a good idea to go with a cardioid setup?
While speakers are able to throw midrange and high frequencies in
directional patterns, low frequencies tend to radiate in all directions.
Excessive bass levels can often be a problem on and behind the stage. And
promoters are increasingly making demands to limit sound systems' low-
end reach, for example, in festival tents at urban venues. Such demands
for limiting low-range frequencies' range are best met with cardioid setups.
With their hardware appointments and fi lter sets, the two LINEAR 9
series subwoofers provide a fast, easy way of confi guring eff ective cardioid
setups.
LINEAR 9 1.0
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Preset, for more on this:
L9 118 Sub BA
Cardioid 1:1 Cardioid 2:1
Cardioid
1:1 Front Front 2:1 Front
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