HK Audio CDR 210 F - Manual (Page 45)

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Figure 23: Groundstack with flying frame
Figure 24 a): normal pin position, b): shifted pin position
Figure 25: Groundstack with CDR 210 C subwoofer
7 Ground-stacking
This option is recommended for smaller venues,
for example, in which enclosures cannot be flown,
or when you want to align the array to cover galleries,
terraces or balconies. You can configure stacks with
or without CDR 210 C subwoofers, as the given
application may require. In both cases, you must
use a standard rigging frame as the base for the
mid/high cabinets.
7.1 Without Subwoofers
Set the standard rigging frame, without shackles
and with the rubber feet facing down, on the
ground, bass bins or stage so that the rigging frame’s
center connector component for the CDR 108 C
enclosures faces up.
Remove the front pins from the rigging frame and
mount the CDR 108 C enclosures upside down.
Proceed as you would to rig a flown system, except
that you do not need a lashing strap to curve the
array. The enclosures’ weight enables the array to be
curved. Maximum stability is achieved in fixed mode.
Note:
You can shift the mid/high stack’s center of gravity
inwards to make it more stable. Use the two holes
on the sides of the rigging frame to do this. They
are located about 70 mm inwards, measured from
the rear edge (see Fig. 24 a, b).
What’s more, you can adjust the rigging frame’s center
connector component on the lowest CDR 108 C
enclosure to tilt the stack 9° downwards. To do this,
use the set angles in fixed mode! The table below
indicates which angle between the rigging frame
and the first mid/high unit will give you the desired
down-tilt:
Desired down-tilt
Label on the CDR 108 C
0° (horizontal) 9°
1.5° 7.5°
3° 6°
4.5° 4.5°
6° 3°
7.5° 1.5°
9° (maximum) 0°
Table 3: Angle between the rigging frame and the first
mid/high unit
Caution:
Always secure ground stacks with a suitable lashing
strap to prevent slippage!
7.2 With CDR 210 C Subwoofers
Depending on application, use two or three CDR 210 C
subwoofers as the base of the stack. Stack the desired
number of subwoofers and then mount the standard
rigging frame using four connector elements by
following the procedure described in section 7.1
for stacking mid/high cabinets.
Important note:
When configuring ground stacks comprised of three
CDR 210 Cs and four to six CDR 108 Cs, subwoofers
must be linked using connector elements!
Rigging and Curving COHEDRA ® Compact System