HK hk0704, hk1203 schematic

Service Documents

Confidential, for authorized service technicians only!

Do not disclose this information to or share these documents

with third parties.

Vertraulich! Nur für autorisierte Servicetechniker!

Nicht zur Weitergabe an Dritte freigegeben!

TECHNICAL SERVICE:

Stamer Musikanlagen GmbH • Magdeburger Str. 8 • 66606 St.Wendel • Germany
Music & Sales P.E. GmbH • Leipziger Str. 3 • 66606 St.Wendel • Germany

Note!

The components used in this product - particularly parts affecting
safety as well as speakers and transformers - were developed and
manufactured to certain specifications. Please use original spare
parts only to ensure the product remains fully functional and safe.

Achtung!

Die in diesem Produkt verwendeten Komponenten, insbesondere
sicherheitsrelevante Teile, Lautsprecher und Transformatoren
wurden nach spezifischen Vorgaben entwickelt und gefertigt.
Bitte benutzen Sie ausschließlich Original-Ersatzteile – nur so ist
die volle Funktionalität und Sicherheit gewährleistet.

COHEDRA

COMPACT

12.12.08

Directory

features

drawing-numbers-example

standard for single wire confection

HK0704 – CDR 210 C

exploded drawings:

HK1203 – CDR 108 C

exploded drawings:

page: 3-98

page: 99

page: 100

page: 101

complete Rev.: B page: 102-103
crossover Rev.: A page: 104-105
dolly Rev.: A page: 106

page: 107

complete Rev.: B page: 108-109

circuit diagrams

crossover Rev.: A page: 110-111

crossover Rev.: A page: 112

Preface

This manual is addressed to all technicians who
are responsible for setting up, operating and main­taining the HK Audio®Cohedra™ Compact system.
In addition, we would like to explain in detail
the principles and functions of HK Audio

®

Cohedra™ technology to all interested
planning and installation engineers.

Content

A Cohedra™ Compact Enclosures

B Cohedra™ Compact Transport Solution

C Rigging and Curving

Cohedra™ Compact System

D Cohedra™ Compact Setups with CAPS

E Cohedra™ Controlling Concept

F Controller and Controller Software

G Cohedra™ Compact Power Racks

H Power Amp VX 2400

I Patchbay PB 5

J Maintenance and Service

K Appendix/Reference library

Version 1.0

Cohedra™ Compact
Manual

Chapter A

Cohedra™ Compact Enclosures

MS D-1181 Deck 12/04

A - 1

Content

1 Cohedra™ Compact Enclosures . . . . . . . . . . 2

1.1 The CDR 108 C Mid/High Unit 2

1.2 The Subwoofer CDR 210 C 3

Index of Figures:

Figure 1: Cohedra Compact CDR 108 C 2
Figure 2: Cohedra Compact CDR 210 C 3

Version 1.0

Cohedra™ Compact Enclosures

1 Cohedra™ Compact
Enclosures

1.1 The CDR 108 C Mid/High Unit

Design and Construction

The CDR 108 C Mid/High unit’s top and bottom
panels are sloped at an angle of 4.5°. Made of 19 mm,
13-ply birch plywood, the enclosure is coated with
water-repellent, black acrylic enamel. For the purpose
of curving the array, your choices of angles (or splay)
are 0°, 1.5°, 3°, 4.5°, 6°, 7.5° and 9°. The baffle board
cover consists of a metal grille; located behind it is
a compression chamber for the 8" speaker and a
CD horn equipped with an acoustical lens for the
two 1" drivers.
The CDR 108 C weighs 17.9 kg. It is 50 cm wide, 26 cm
high and 32.5 cm deep (including rigging attachments).
Two grips on the side panels facilitate transport and
set-up.

Serving to fly the mid/high units are fully integrated
rigging attachments comprising four quick-release
pins and three rigging connectors, two mounted on
the sides and one in the rear.

Electrical and Acoustical Data

The CDR 108 C enclosure is loaded with an 8" cone
chassis speaker and two 1" B&C high frequency drivers
with a front-mounted acoustical lens in a CD horn
configuration. The drivers are addressed via an
internal passive crossover with a separating frequency
of 800 hertz.

The CDR 108 C enclosure’s nominal electrical power­handling capacity is 250 watts RMS at 16 ohms
impedance. It produces a sound pressure level
of 107 dB (1W@1m), measured under half-space
conditions. Maximum SPL measured under the
same conditions at a distance of one meter is
136 dB at 10% THD.

The CDR 108 radiates at a horizontal angle of 100°.
Frequency response ranges from 88 Hz to 19 kHz
(±3 dB). The enclosure is thus able to provide
speech reinforcement for public address applica­tions without requiring a subwoofer.

Connections

The connector panel on the rear of the CDR 108 C
is recessed to protect the ports from harm. On this
enclosure, you’ll find two Speakon®NL 4 connectors.
Both ports’ four pins are wired in parallel.
Pin assignments are: pin 1+ = mid/high +,
1- = mid/high -, 2+ = sub +, 2- = sub 2-.

The CDR 108 C Enclosures’ Technical Data

Nominal power handling : 250 watts RMS,
500 watts program
Frequency range: ± 3 dB: 88 Hz – 19 kHz

SPL, 1W @ 1m*: 107 dB
SPL, max. SPL @ 1m*: 136 dB @ 10% THD**

Impedance: 16 ohms
Woofer/midrange speaker: 1x 8" with compression
chamber
High-frequency driver: 2x 1" with Cohedra™ Acoustic
Lens
Horn: 100° CD horn
Crossover frequency: 800 Hz, 12 dB/ octave

Ports: Speakon®NL 4 connectors
Pin assignments: 1+ = mid/ high +, 1- = mid/ high -,
2+ = sub +, 2- = sub 2-

Housing
Material: 15-mm (5/8"), 13-ply birch plywood
Coating: Black acrylic enamel
Front grille: Metal

Rigging hardware: Integrated rigging attachments
Variable splay for curving arrays: 0°, 1.5°, 3°, 4.5°, 6°,

7.5°, 9°

Weight: 17.9 kg (39.4 lbs)
Dimensions (W x H x D): 50 x 26 x 32.5 cm
19-5/8" x 10-1/4" x 12-3/4"

*) SPL measured under half-space conditions
**) measured with 4 CDR 108 Cs

Cohedra™ Compact
Manual

Figure 1: Cohedra Compact CDR 108 C

A - 3

1.2 The Subwoofer CDR 210 C

Design and Construction of the Subwoofer

Made of 19 mm, 13-ply birch plywood, the CDR 210 C
enclosure is coated with water-repellent, black acrylic
enamel. The baffle board cover consists of a metal
grille.
The CDR 210 C weighs 48 kg. It is 55 cm wide, 60 high
and 63 cm deep. Two slot grips have been routed
into the top, bottom and back panels for easy
transport and set-up.

Electrical and Acoustical Data

The CDR 210 Sub enclosure is loaded with two 10"
woofers. The loudspeakers are treated with a special
coating protecting them against dirt and moisture.

The CDR 210 C enclosure’s nominal electrical
power-handling capacity is 600 watts RMS at 8 ohms
impedance. It produces a sound pressure level of
104 dB (1W@1m), measured under half-space con­ditions. Maximum SPL measured under the same
conditions at a distance of one meter is 139 dB at
10% THD**. The frequency response of the CDR 210 C
ranges from 47Hz to fx (+/-3 dB).

Connections

The connector panel on the rear of the CDR 210 C
enclosure is recessed to protect the ports from
harm. On this enclosure, you’ll find two Speakon

®

NL 4 connectors. Both ports’ four pins are wired in
parallel. Pin assignments are pin 1+ = mid/high +,
1- = mid/high -, 2+ = sub +, 2- = sub -.

The Cohedra CDR 210 C Subwoofer’s Technical Data

Power handling (RMS): 600 watts RMS,
1200 watts program
Frequency range (±3 dB): 47 Hz to fx
Frequency range (-10 dB): 39 Hz to fx

SPL, 1W @ 1m*: 104 dB
SPL, max. SPL @ 1m*): 139 dB @ 10% THD**

Impedance: 8 ohms
Woofers: 2x 10"

Connections: 2 NL 4 Speakon®ports, wired in parallel
Pin assignments: 1+ = mid/ high +, 1- = mid/ high -,
2+ = sub +, 2- = sub 2-

Housing
Material: 19-mm (3/4"), 13-ply birch plywood
Coating: Black acrylic enamel
Front grille: Metal
Handles: Four slot grips

Rigging hardware: Integrated pick points

Weight: 48 kg (105.6 lbs)
Dimensions (W x H x D): 50 cm x 60 cm x 63 cm
19 3/4" x 23 3/4" x 24 3/42

*) SPL measured under half-space conditions
**) measured with 4 CDR 210 Cs *)

Version 1.0

Figure 2: Cohedra Compact CDR 210 C

Chapter B

Cohedra™ Compact Transport Solution

Cohedra™ Compact
Manual

MS D-1181 A 12/04

B - 1

Content

1 Cohedra™ Compact Transport Solution . . . . 2

1.1 CDR 108 C Mid/High Case 2

1.2 Dimensions and Weights 2

Index of Figures:

Figure 1: Cohedra™ Compact Mid/High Case 2
Figure 2: 16 Mid/High enclosures and

8 Subwoofers 3

Version 1.0

Cohedra™ Compact Transport Solution

1 Cohedra™ Compact
Transport Solution

1.1 CDR 108 C Mid/ High Case

A specially designed case serves to transport
COHEDRA™ Compact CDR 108 C mid/high en­closures. One case accommodates four CDR 108 Cs
and a standard rigging frame each.

1.2 Dimensions and Weights

Case for four CDR 208s:

Width: 80 cm/ 31 1/2"
Depth: 60 cm/ 23 5/8"
Height (standing on casters): 70 cm/ 27 1/2"
Weight (without rigging frame) : approx. 98 kg/ 215 lbs.
Weight (with rigging frame) : approx. 108 kg/ 238 lbs.

PR 16 (lying):

Width: 60 cm/ 23 5/8"
Height: 65.5 cm/ 25 3/4"
Depth (standing on casters): 95 cm/ 37 3/8"
Weight: approx. 125 kg/ 275 lbs.

PR 8 (lying):

Width: 60 cm/ 23 5/8"
Height: 38.5 cm/ 15 1/8"
Depth (standing on casters): 95 cm/ 37 3/8"
Weight: approx. 65 kg/ 143.3 lbs.

CDR 210 C:

Width: 50 cm/ 19 3/4"
Height: 60 cm/ 23 1/4"
Depth (standing on casters): 75 cm/ 29 1/2"
Weight: approx. 48 kg/ 105.6 lbs.

Cohedra™ Compact
Manual

Figure 1: COHEDRA™ Compact Mid/High Case

B - 3Version 1.0

208 cm / 81

7

/

8

Figure 2: 16 Mid/High enclosures and 8 Subwoofers

Chapter C

Rigging and Curving Cohedra™ Compact Systems

Cohedra™ Compact
Manual

MS D-1181 B 12/04

C - 1

Content

Rigging Cohedra™ Compact Systems

1 Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.1 Intended Use 2

1.2 Unintended Use 2

2 Warranty and Liability . . . . . . . . . . . . . . . . . . 2

Important Notes on Safety 2

2.1 Responsibilities of the Operator 2

2.2 Storage, Maintenance, Inspection
and Repair of Cohedra™ Compact
Rigging Hardware 2

2.3 Technical Specifications of
Cohedra™ Compact Rigging Hardware 2

2.4 Maximum Permissible Number of flown
Cohedra™ Compact Mid/High Units 2

2.5 Maximum Permissible Number of flown
Cohedra™ Compact CDR 210 C Subwoofers 4

2.6 Pick Points for Flying Cohedra™
Compact Enclosures 4

2.7 Structural Modifications of
Cohedra™ Compact Rigging Hardware 4

2.8 Original HK Audio®Accessories: 4

2.9 Initiation and Operation 4

3 Components and Applications of

Cohedra™ Compact Rigging Hardware . . . . . 5

3.1 Flying Enclosures Using Quick-release Pins 5

3.2 Flying Arrays with Lightweight Rigging
Frames 6

4 Determining the Splay Between

Two CDR 108 C Enclosures . . . . . . . . . . . . . . 6

4.1 Compression Mode 6

4.2 Fixed Mode 8

5 Flying CDR 210 C Subwoofers . . . . . . . . . . . 9

5.1 Components 9

5.2 As an Independent Bass Array on
a Second Rigging Frame 9

5.3 In Combination with CDR 108 C Mid/ High 9

6 Setup CDR 210 C Subwoofer . . . . . . . . . . . . 9

7 Ground-stacking . . . . . . . . . . . . . . . . . . . . . 10

7.1 Without Subwoofer 10

7.2 With CDR 210 C Subwoofers 10

8 Operating the System . . . . . . . . . . . . . . . . . 11

8.1 Connecting Speaker Cords 11

8.2 Activating PR 8 and PR 16 Amp Racks 11

8.3 Checking Individual Mid/High Enclosures 11

8.4 Configuring the Controller Network
Using Audio Controller Software 11

8 Tearing Down and Transporting the System . . 12

Index of Figures:

Figure 1: Cohedra™ Compact Mid/High case 2
Figure 2: 16 Cohedra™ – CDR 108 C 5
Figure 3: CDR 108 C with integrated

rigging attachments 5

Figure 4: Cohedra™ Compact

standard rigging frame 5

Figure 5: Cohedra™ Compact

lightweight rigging frame 5

Figure 6: Optional quick-release pins for

flying up to six CDR 108 C enclosures 5
Figure 7: Shackles for attaching motors, straps 5
Figure 8: Lashing strap for curving the array

in compression mode 5
Figure 9: Quick-release pin 5
Figure 10: Horizontal array comprising three

CDR 108 Cs 6
Figure 11: CDR 108 C set angle in compression

mode: 4.5° 6
Figure 12: Open case with four

CDR 108 C enclosures 6
Figure 13: Rigging frame set to 0° 6
Figure 14: Setting an interim angle 7
Figure 15: Mounting the standard

rigging frame 7
Figure 16: Setting the splay to curve

a CDR 108 C array 7
Figure 17: Hoisting the top four

Cohedra™ Compact Enclosures 7
Figure 18
a, b, c: Rigging additional

CDR 108 C enclosures 7
Figure 19: Attaching the lashing strap 8
Figure 20: Example fixed mode application

with 4.5° angle 8
Figure 21: CDR 210 C Rigging Set 9
Figure 22: CDR 210 C Subwoofer Cluster 9
Figure 23: Ground stack with the

standard rigging frame 10
Figure 24: Ground stack with

CDR 210 C subwoofers 10

Index of Tables:

Table 1: Weights of Cohedra™ Compact

mid/high enclosures 2

Table 2: Weights of Cohedra™ Compact

CDR 210 C subwoofers 4

Table 3: Angle between the rigging frames

and first mid/high unit 10

Version 1.0

Rigging and Curving Cohedra™ Compact Systems

Rigging Cohedra™ Compact Systems

Please read these instructions carefully before you
begin setting up the system!

1 Use

1.1 Intended Use

Specifications for intended use include the following:

• When rigging enclosures, make sure that the load
is centered directly under the suspension point
on the rigging frame.

• The rigging frame may be tilted (not to be confused
with curved!) no more than 10% (6°). Note that
the specifications for intended use require you
to read and heed all of the operating instructions
and comply with inspection and maintenance
requirements.

Any use other than specified is unintended.
The manufacturer shall not be liable for damages
resulting from unintended use.

1.2 Unintended Use

Improper use of rigging frames and incorrect
handling of this load-carrying equipment can pose
a serious danger. Never

• use rigging frames to exert diagonal force or
tension on loads,

• use a crane to dislodge stuck or immovable loads,

• lift people,

• strike, knock or dent rigging frames,

• heat-treat or weld rigging frames,

• exceed the truss’s maximum load-carrying capacity.

Note that in addition to the above specifications,
the operational safety regulations of VBG 9 (accident
prevention regulations of the German employers’
liability insurance association) apply.

2 Warranty and Liability

HK Audio®shall not be held responsible for damages
due to improper use or non-compliance with the
safety specifications for setup and operation.
All warranty and liability claims for personal injury
and property damages are excluded if attributable
to one or several of the following:

• non-compliance with operating manual instructions,
voiding product liability and warranty claims

• unintended use of rigging frames

• non-compliance with operating manual instructions
regarding transportation, storage, initial setup,
operation, maintenance and repair of rigging frames

• unauthorized structural modifications performed
on rigging frames

• unauthorized modification of the parameters
indicated in the operating manual

• inadequate or improper repairs

Important Notes on Safety

Original Cohedra™ rigging accessories have been
certified as a complete and cohesive system by the
safety standards authority TÜV. The Cohedra™ rigging
system’s provisions for use require that it be installed
in accordance with the following specifications. Before
you begin installation, ensure that the rigging points
(for example, a chain hoist) on the stage roof or
the venue’s ceiling comply with BGV-C1 accident
prevention regulations and that the safety standards
authority TÜV has certified them for the full load
(see table 1). Prior to every installation, inspect all
components to ensure they are in good operating
condition, taking particular care to confirm that all
quick-release pins and hardware connectors are
undamaged.

The principle requirement for safe handling and
trouble-free operation of rigging frames is a thorough
understanding of fundamental operating safety and
safety regulations.
This operating manual contains important instruc­tions on the safe operation of rigging frames.

Cohedra™ Compact
Manual

Figure 1: Cohedra™ Compact Mid/High case

C - 3

2.1 Responsibilities of
the Operator

As the operator, you are obligated to allow only those
persons to work with rigging frames who are

• 16 years of age or older,

• physically and mentally able, familiar with the basic
rules of industrial safety and accident prevention,
and trained in the handling of rigging frames.

Be sure to regularly review and confirm personnel’s
working safety awareness.
In addition, task personnel with specific responsi­bilities for setting up, putting into service, operating,
maintaining, and repairing equipment.
Ensure that personnel are trained to work with
the rigging frame only under the supervision of a
proficient and experienced technician. Ensure also
that defects, flaws and other damage that could
impede safety are repaired immediately.

2.2 Storage, Maintenance,

Inspection and Repair of
Cohedra™ Compact
Rigging Hardware

Storage and safekeeping when not in use

When not in use store the rigging frame in a safe
place where it cannot be tipped over and is
protected from exposure to the elements.

Inspections

§ 39, VBG 9a of the German employers’ liability

insurance association’s accident prevention
regulations requires that load-carrying equipment
be inspected by a qualified expert and possible
defects be eliminated prior to initial commissioning
by the recipient.

§ 40, VBG 9a requires that load-carrying equipment

be inspected at least annually for cracks.
When used in dynamic applications, equipment
must be inspected for cracks every six months.

Maintenance

You are authorized to replace easily serviceable
wearing or standard parts in accordance with the
manufacturer’s instructions. Use original parts
for this purpose.
Tighten screws and bolted connections whenever
necessary.

Repair

In the event that parts of the load-carrying equip­ment have been deformed, it is up to the manufac­turer to determine if they are repairable.
Solely the manufacturer is authorized to perform
welding and repair jobs on load-carrying equipment.

2.3 Technical Specifications
of Cohedra™ Compact
Rigging Hardware

Load-carrying capacity of the rigging frame: 350 kg
Test load: 2,100 kg
Ambient temperature when in operation: min. –10° C,
max. + 60° C

2.4 Maximum Permissible
Number of Flown Cohedra™
Compact Mid/High Units

No more than 16 mid/high range enclosures may
be flown in a stacked array.

• Up to 16 mid/high range enclosures may be flown
in a stacked array with the standard rigging frame.

• No more than 6 mid/high range enclosures may
be flown in a stacked array when using the light­weight rigging frame.

• No more than 6 mid/high range enclosures may
be flown in a stacked array when using quick-relea­se pins. In addition, be sure to mind the quick-re­lease pins’ maximum permissible load!

Warning:

Flying more than 16 enclosures in a stacked array
voids the safety standards authority TÜV’s certifica­tion!

Refer to table 1 to determine flown loads. The sum
of the weights of Cohedra™ Compact mid/high en­closures plus the weight of the rigging frames
equals the total load.

Note: Ensure that you add the weights of chain
hoists, motors, cables and further stops to determi­ne total weight!

Quantity Weight [kg] [lbs.]

1 18 40
2 36 79
3 54 119
4 72 158
5 90 198
6 108 238
7 126 277
8 144 317
9 162 356
10 180 396
11 198 436
12 216 475
13 234 515
14 252 554
15 270 594
16 288 634

Weight of the standard rigging frame with shackles:

10.5 kg/ 23.10 lbs.

Table 1: Weights of Cohedra™ Compact

mid/ high enclosures

Version 1.0

Rigging and Curving Cohedra™ Compact Systems

2.5 Maximum Permissible
Number of Flown Cohedra™
Compact CDR 210 C Subwoofers

• No more than six CDR 210 C subwoofers may be
flown in stacked array with the standard rigging
frame.

Warning: Flying more than six subwoofers in stacked
array voids the safety standards authority TÜV’s
certification!

CDR 210 C subwoofers and CDR 108 C mid/high
units may also be flown together on one rigging frame.
Refer to table 2 to determine flown loads. The sum
of the weights of CDR 210 C subwoofers and
Cohedra™ Compact mid/high enclosures plus the
weight of the rigging frames equals the total load.

Note: Ensure that you add the weights of chain
hoists, motors, cables and further stops to determine
total weight!

Quantity Weight [kg] [lbs.]

1 48 105.6
2 96 211.2
3 144 316.8
4 192 422.4
5 240 528
6 288 633.6

Weight of the standard rigging frame with shackles:

10.5 kg/ 23.10 lbs.

Table 2: Weights of Cohedra™ Compact

CDR 210 C subwoofers

2.6 Pick Points for Flying

Cohedra™ Compact Enclosures

Use only the top rigging frame’s shackles to attach
motors, chain hoists and straps. Shackles are inserted
into the elongated holes in the center rail!
Clear the area below arrays immediately of people
before raising or lowering loads.
Lift and lower flown mid/high enclosures smoothly,
avoiding abrupt stops or jerky motions.
Secure the flown array with straps to prevent it from
moving, for example, in the event of wind.

2.7 Structural Modifications

of Cohedra™ Compact
Rigging Hardware

No structural modifications may be made without
the manufacturer’s consent. This also applies to
welding work performed on supporting parts. Struc­tural alterations require the manufacturer’s written
approval. Use original replacement and wearing
parts only.

2.8 Original HK Audio

®

Accessories:

Use original HK Audio®parts only (see chapter 3)!
The safety standards authority TÜV has not certified
any other parts for use! Always install parts in
accordance with these installation instructions!
Compile and store all documents pertaining to
the system in a safe place!

2.9 Initiation and Operation

§ 39, VBG 9a of the German employers’ liability
insurance association‘s accident prevention regula­tions requires that load-carrying equipment be
inspected by a qualified expert and possible defects
be eliminated prior to initial commissioning by
the recipient.

§ 41 VBG 9a requires that load-carrying equipment
be subjected to a non-routine inspection following
damage, repair work and other incidents that can
affect load-carrying capacity.

Cohedra™ Compact
Manual

C - 5

3 Components and
Applications of
Cohedra™ Compact
Rigging Hardware

Cohedra™ Compact rigging hardware consists of
the following parts:

• a standard rigging frame with two shackles for
attaching motors, lashing straps or chain hoists.
The rigging frame also serves as the base for gro­und stacks if the array is not stacked on
CDR 210 C subwoofers.

• an optional lightweight rigging frame for flying
up to eight CDR 108 C enclosures.

• side-mounted, recessed rigging points designed
to accept optionally available quick-release pins
for up to six CDR 108 C enclosures.

• an optional two-part lashing strap for curving the
array in compression mode.

• integrated rigging points on the side and back
for flying Cohedra™ Compact enclosures

• four quick-release pins per CDR 108 C for
connecting the enclosure to rigging frames.

Important note on pins: Quick-release pins serve to
connect rigging hardware and speaker enclosures,
and their proper function must be tested and verified.
The pins must always engage fully in the (fitted)
hole. Under no circumstances may these pins relea­se on their own when subjected to tractional forces.
The nib in the center of the pinhead must always be
depressed to insert pins; it releases the ball detents
in front. Once the pin engages in the hole, the nib
must glide back to its initial position.

3.1 Flying Enclosures Using

Quick-release Pins

Small Applications

For small applications (up to six CDR 108 C), you
may use two quick-release pins instead of a rigging
frame. These are inserted into the top enclosure’s
designated side holes. The holes accept 10-mm
pins (see figure 6. Be sure to mind the quick-release
pins’ permissible load as well as the manufacturer’s
safety guidelines!

Version 1.0

Figure 2: 16 Cohedra™ – CDR 108 C

Figure 3: CDR 108 C with integrated rigging attachments

Figure 4: Cohedra™ Compact standard rigging frame

Figure 9: Quick-release pin

Figure 5: Cohedra™ Compact lightweight rigging frame

Figure 6: Optional quick-release pins for flying up to

six CDR 108 C enclosures

Figure 8: Lashing strap for curving the array in

compression mode

Figure 7: Shackles for attaching motors, straps

Rigging and Curving Cohedra™ Compact Systems

Setting Up a Horizontal Array

You can configure up to three CDR 108 C enclosures
in a horizontal array using quick-release pins. Connect
three CDR 108 C enclosures and set the splay between
the enclosures for fixed mode and in accordance with
the given requirements. To learn more about this,
read the chapter Determining the Splay Between Two
CDR 108 C Enclosures. To do this, you will need two
quick-release pins with 10-mm uptake and adequate
load-carrying capacity. Mount these to the outermost
enclosures, where they will serve as fixing points for
flying the rig (see Figure 10).

3.2 Flying Arrays with Light­weight Rigging Frames

As an alternative to the standard rigging frame that
flies up to sixteen CDR 108 C enclosures, you can
opt to use the lightweight rigging frame designed
to accommodate up to six CDR 108 Cs. The rigging
procedure is the same as for the standard rigging
frame. However, the lightweight rigging frame may
be adjusted to the 0° position only on the rear rigging
connector!

4 Determining the Splay
Between Two CDR 108 C
Enclosures

You have two options for setting the splay between
CDR 108 C enclosures - compression mode and fixed
mode. In compression mode, the angle is easily
adjusted after the array has been flown. This requires
a lashing-strap or chain hoist. In fixed mode, the angle
is determined during setup and the flown array cannot
be adjusted later. This option does not require a
lashing-strap or chain hoist. Compression mode
is recommended for setups comprising 12 to 16 mid/­high enclosures; fixed mode for smaller configurations.

4.1 Compression Mode

Determine the splay between two enclosures by
adjusting a single pin (Set Angle). One person can
easily perform the entire process of curving arrays.

The following angles may be adjusted between two
CDR 108 C enclosures: 0°, 1.5°, 3°, 4.5°, 6°, 7.5° and 9°.

The rigging equipment is designed so that the splay
can be adjusted when Cohedra™ Compact arrays
have been lifted.

How is this done?

The pin that determines the splay (Set Angle) is
merely a predefined stop for the flexible connector
component when the entire Cohedra™ Compact array
is compressed accordion-style at the back and thereby
adjusted using a lashing strap or chain hoist.
When no force is exerted, the entire mid/high array
is suspended at 0°, meaning that the pin (Set Angle)
is easily repositioned (see Figure 11)!

Important note: The pin labeled Link connects
individual CDR 108 C cabinets. Ensure this pin
is inserted, otherwise the enclosures will not be
connected to each other and may swing forward!

Preparations

The following section describes how to set up an
array in compression mode. Use Cohedra™ CAPS
to select rigging frame pick points for determining
the angles between CDR 108 C enclosures.

Move the open case with the CDR 108 C enclosures
in position. Remove the top cover.

Mounting the Rigging Frame

The tasks described below require two people.
Remove the quick-release pins from the rigging frame
and the two pins on the back of the top CDR 108 C
enclosure. Set the rigging frame on the enclosure.
First attach the two front connectors. Turn the rigging
frame’s connector component down and slide it
into the rear rigging connector.

Important:

The standard rigging frame’s connector component
is longer than that of mid/high cabinets. This means
that you can also set ascending angles, for example,
for covering balconies, terraces, etc. Bear in mind
that a 0° angle between rigging frames and the first
1 CDR 08 C enclosure is set using the hole labeled
9° on the mid/high unit (see Table 3)! To mount the
rigging frame, always employ the fixed mode option
as follows:

Insert the first pin through the hole labeled 9° on
the enclosure and attach the connector component
by inserting the second pin through the slot into the
hole labeled 6° (see Figure 13).

Attach to the top rigging frame the shackle destined
to accept the motor hook (see Figure 14). Your choice
of pick point depends on how sharply you aim to
curve the array later.

Note: Depending on application, you may not be
able to select a pick point with a shackle. In this
case, use two shackles and a suitable O ring as sho­wn in Figure 14.

Cohedra™ Compact
Manual

Figure 10: Horizontal array comprising three CDR 108 Cs

Figure 11: CDR 108 C set angle in compression mode: 4.5°

Figure 12: Open case with four CDR 108 C enclosures

Figure 13: Rigging frame set to 0°

C - 7

Check all pins on the top rigging frame to ensure
they are firmly seated and attach the motor to the
shackle.

Important: Ensure the motor’s chain bag hangs fre­ely and does not rest on the rigging frame!

Remove the two front pins of the lowest enclosure
and fold down its connector component. Now you
can rig the second two-cabinet block. Curve the
four CDR 108 C enclosures as desired for the given
application by setting the pins on the back accordingly
(see chapter 3.1). Determine the desired angle using
the pin labeled Set Angle.

This is also a good time to connect the speaker
cords to the four enclosures that will later be at the
top of the array. Bear in mind that you must attach
one of the shackles on the rigging frame to the lashing
strap or chain hoist that will later serve to pull back
the ends of the array to curve out its front face.
Do this now.

Tip: If you intend to rig additional CDR 108 C en­closures, it is recommended that you attach all the
required speaker cords to the top rigging frame
now because this task is made more difficult as the
height of the array increases. Be sure to use cords
of sufficient length!

Rigging Additional Cohedra™ Compact Enclosures

Hoist the mid/ high cabinets to a height that allows
you to roll a second case holding four CDR 108 C
enclosures under the array. Remove the two front
pins from the lowest flown enclosure.

Move the second case with four additional CDR 108
C enclosures into position. Slowly lower the top
four cabinets until the two front connectors engage.
Insert the two front pins first, ensuring that they en­gage fully and securely (see Figure 17 a). You may
have to shift the two enclosures slightly to ease the
pins into position. In order to attach the rear
connector component, you must swivel it out of the
rail so that the round end faces up and the slot fa­ces down (see Figure 17 b). To connect the two
blocks, insert the pin through the connector’s elon­gated hole and through the hole labeled Link.

Version 1.0

Figure 14: Setting an interim angle

Figure 15: Mounting the standard rigging frame

Figure 16: Setting the splay to curve a CDR 108 C array

Figure 17: Hoisting the top four

Cohedra™ Compact Enclosures

Figure 18 a: Rigging additional CDR 108 C enclosures

Figure 18 c

Figure 18 b

Rigging and Curving Cohedra™ Compact Systems

Hoist the Cohedra™ Compact array with the eight
enclosures just high enough to remove it from
the case.

Insert the pins on the back of the bottom four
enclosures’ Set Angle holes to achieve the desired
curving angle. Connect the remaining speaker cords.
Repeat the above procedure to configure even more
CDR 108 enclosures in a flown stacked array.

Raising the System

The enclosures are rigged, speaker cords are all
connected, and the pins are set in the required
configuration. If you want to use the lashing strap
to curve the Cohedra™ Compact array, connect one
of its hooks to the rigging frame. Using a shackle
(an 8-mm bolt), attach the hook on the other end to
the bottom bin (best to the connector component).
Tighten the strap until it exerts enough force to
curve the array as desired.

Once you have hoisted the Cohedra™ Compact array,
secure it against gusts of wind or accidental twisting
using two lashing straps or ropes.

4.2 Fixed Mode

To determine the splay between two enclosures in
fixed mode, you must insert one pin (Set Angle) and
fix the connector component in place with the second
pin. To fix the selected angle, insert the pin into the
neighboring hole labeled Link above the selected
angle (Set Angle). This fixes the connector component
in place so that it is immobile in all directions (See
Figure 20).

This option gives you the same splay options between
two CDR 108 C enclosures to choose from – that is,
angles of 0°, 1.5°, 3°, 4.5°, 6°, 7.5° and 9°.

To set up the system, follow the same procedure de­scribed for compression mode. Often when arrays
are sharply curved it becomes difficult to rig additional
blocks. In this event, you must mount enclosures
separately from below.

Cohedra™ Compact
Manual

Figure 19: Attaching the lashing strap

Figure 19: Example fixed mode application with 4.5° angle

C - 9

5 Flying CDR 210 C
Subwoofers

5.1 Components

The following components are required to fly
CDR 210 C subwoofers:

• a standard rigging frame.

• the pick points on the side panels of Cohedra™
Compact CDR 210 C subwoofers

• the CDR 210 C Rigging Set consisting of four
connector components and eight pins

5.2 As an Independent Bass Array

on a Second Rigging Frame

The standard rigging frame is certified to fly up to
six CDR 210 Cs in stacked array. Read and heed also
the safety regulations in chapter C of the manual.

Rigging

Set the standard rigging frame on the CDR 210 C
subwoofer with the rubber feet facing down. Remove
the four pins on the rigging frame. Attach the four
(optional) connector components between the rigging
frame and the CDR 210 C using the pins. Attach the
shackles for the motor to the rigging frame. Attach
the motor to the shackle and lift the subwoofer.
Now you can rig additional CDR 210 C bins below
this subwoofer. To do this, you need four connector
components and eight pins for each subwoofer.
(=1Set)

5.3 In Combination with

CDR 108 C Mid/High

Configuring subwoofers and mid/high units together
in a single array can be a viable option, depending
on application. Subwoofers must be rigged on top
of the flown array for this application.
Mind the rigging frame’s maximum permissible load.
Before you begin, add up the individual components’
weights to determine total system weight. Refer to
tables 1 and 2 for weight specifications.

6 Configuring CDR 210 C
Subwoofers in Clusters

CDR 210 C enclosures have been optimized for
setting up clusters comprising four subwoofers.
When configuring a cluster, set up the bins so that
the bass reflex apertures point toward each other.
This ensures the various subwoofers’ low-frequency
signals couple for maximum sonic effect. To this end,
set one row of speakers bottom side up (see Figure

22). The housings are equipped with feet on the
bottom and top panels. Refer to the labels on the
connector panel for details.

Version 1.0

Figure 21: CDR 210 C Rigging Set

Figure 22: Setting up CDR 210 C subwoofers in a cluster

Rigging and Curving Cohedra™ Compact Systems

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 Figure 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!

Cohedra™ Compact
Manual

Figure 23: Groundstack with flying frame

Figure 24 a): normal pin position, b): shifted pin position

Figure 25: Groundstack with CDR 210 C subwoofer

C - 11

8 Operating the System

We recommend the following procedure to help
prevent errors and troubleshoot problems quickly.
The adverse effect of a mid/high cabinet dropping
out or an incorrect connection can seriously degrade
a line array’s performance!

8.1 Connecting Speaker Cords

Always ensure cables are laid out clearly and orderly!
You should be able to attribute enclosures to their
connected power amp channel and/or amp rack at
any time. This ensures flaws such as defective cords
can be pinpointed and repaired swiftly.

Example setup using a PB 5:

Channel 1 drives the array’s four (two or three) top
mid/high units, while channel 2 drives the four
units below that, and so forth. Thus, one HK Audio

®

LS cable can serve to drive a total of four mid/high
units per channel.
If more cabinets are connected, they are addressed
by an additional PB 5, and the channel 1-to-4
numbering system is repeated. See the chapter
on the PB 5 in the manual to learn more about
how to assign power amp channels to the PB 5’s
channels 1 to 4.

Take the same systematic approach when connecting
CDR 210 C subwoofers.

8.2 Activating Amp Racks

PR 8 and PR 16

Ensure the VX 2400s’ power switches are off and
the gain knobs are turned all the way down. Check
the Phase switches on the PB 5s or PB 2s. They
must all be set to +2 (or +3)! Once you have done
this, switch on the PS 32 circuit breakers on the
back of the amp racks. The DFCs and the PB 5 patch
bays are now supplied with power. First select the
appropriate filter for your setup on all DFCs (making
sure you select the same set on each!). If you are
unsure of how the amp rack or DFC was used in the
previous application (delays, EQ, etc. settings), as
a precaution carry out a hot reset on all DFCs and
then select the filter set on the DFCs! Read the
chapter on the DFC in the manual to learn more
about how to do this.
Before you can continue, you must first connect to
the amp racks the DFCs’ remote line and all of the
system’s audio cords.

8.3 Checking Individual
Mid/High Enclosures

The best method of checking cabinets is to play a
familiar song on a CD, routing the signal into the
mixer and out via the master channel. Set the master
level to a low-to-medium setting.

• Turn up channel 1’s gain knob. You will hear the
signal rendered by the array’s four top mid/high
cabinets. The display of the DFC assigned to this
pair should indicate incoming signal levels.
Important note: If you are located outside the high
frequency signal’s directivity radius, you will not
be able to hear this signal! This system check is
best performed with a helper positioned a suitable
distance from the array.
The rule of thumb is, if you can see the bottom
of the mid/high unit as a plane surface, you are
outside its directivity radius!

• Turn the channel 1 gain knob back down after
hearing the signal!

• Follow the same procedure for all other power
amp channels that you want to use. Be sure to
turn the gain knob down after each successful test!

Note: With this procedure, you are checking mid/high
cabinets in descending order; that is, from top to
bottom. A cabinet’s height affects its directivity, so
the lower the cabinets, the closer the listener should
move in towards the array.

• Follow the same procedure for the subwoofers.

• Once you have checked all cabinets successfully,
turn up all gain knobs, one after the other.

• Start with the channel 1 gain knob for the top
mid/high units, and then turn up the channel 2
gain knob, and so forth. With every additional
channel that you activate, you should hear a boost
in low midrange response. If not, this may be due
to a phase inversion in the NF (or in extreme cases,
in the speaker cords)! Also check the PB 5’s or
PB 2’s Phase switch again.

• Proceed in the same manner for the subwoofer

channels.

8.4 Configuring the

Controller Network Using
Audio Controller Software

Once you have performed these tests, you can con­figure the controller network. The type and size of
the configuration of course depends on the given
sound reinforcement task (PA left/right, center,
out-fills, etc.).
Read the chapter on DFC software in the manual to
learn more about networking controllers, creating
groups and setting delays and levels.

Version 1.0

Rigging and Curving Cohedra™ Compact Systems

9 Tearing Down and
Transporting the System

As the somewhat clichéd but certainly true adage
goes: To disassemble the system, proceed in the
reverse order of assembly.

These tips should make the task of tearing down the
mid/high array easier:
1 Lower the array until the bottom of the mid/high

case fits under it.

2 Engage the motor or chain hoist to relax the tension

on the strap that is curving the array.
Caution: The array may belly out towards the
front!

3 Disconnect at least the four lower cabinets’ cords.
4 Set the Set Angle pins that are determining the

array’s curving to 0°! This way the array will not
buckle when lowering and setting it on the bottom
of the case. This also makes it easier to dismantle
the four-cabinet block.

5 Always insert the front pins into the holes on the

rigging connector to ensure they are not damaged
or torn off when the array is lowered onto the case!

6 Carefully lower the array into the case. First remove

the rear Link pin connecting the two mid/high
units. Then remove the two front pins. Raise the
array slightly so that the lower four-bin block can
be rolled away.

Cohedra™ Compact
Manual

C - 13Version 1.0

Chapter D

Setups with CAPS

Cohedra™ Compact
Manual

MS D-1181 C 12/04

D - 1

CAPS Version 2.1.8

Amendment to Chapter D – Setup with CAPS

Table of Contents

1 Launching the Application . . . . . . . . . . . . . . . . 2

2 Selecting Cohedra™ and Cohedra Compact™ . . 2

3 Integrating the Subwoofers CDR 210 F

and CDR 210 C . . . . . . . . . . . . . . . . . . . . . . . . . 3

3.1 Flying CDR 108 C Mid/High Units with
CDR 210 C Subwoofers 3

Index of Figures:

Figure 1: The Select System dialog appears when

the software is launched 2

Figure 2: The File New menu and

system selection 2
Figure 3: Configuring flown subwoofers 2
Figure 4: Example ground stack 3
Figure 5: Example of a down-tilt simulation

for a Cohedra Compact™ ground stack 4

Version 2.0

Cohedra™ Manual
Update

Setups with CAPS

Amendment to the CAPS
Version 2.1.8 Manual

An amendment to the chapter entitled "Setups with
CAPS" in Cohedra™ manuals, this set of instructions
discusses new menus and functions. If you are
unfamiliar with CAPS, please read the chapter
"Setups with CAPS" first. You’ll find the new functions
much easier to handle with a little background insight.

Version 2.1.8 has been extended to accommodate
the following components:

• Cohedra™ CDR 210 F Subwoofer

• Cohedra Compact™ with the system components
CDR 108 C and CDR 210 C

1 Launching
the Application

When you first start the software, a prompt appears
stating Select System. In this dialog box, select
the system that you want to simulate - Cohedra™
CDR 208 S(T) or Cohedra Compact™ CDR 108 C.
If you leave the checkmark in the small box located
next to Show this dialog when the program starts,
this prompt will appear every time you launch the
application. If you remove the checkmark, it will no
longer appear automatically.

Note:

You can switch systems at any time via CAPS’ menu
bar. More on this in chapter 2.

2 Selecting Cohedra™
and Cohedra Compact™

Go to the menu bar, select the File menu, and then
the submenu New, where you can opt for either
Cohedra™ CDR 208 S(T) or Cohedra Compact™
CDR 108 C. When you switch from one to the other,
a prompt appears asking you if you want to save the
current application, which will subsequently be closed.

Note:

If you switch from system to the other via File New,
the application will load the default Location (room)
and Setup! If you entered the dimensions of a room,
these data are lost when you switch over to the other
rig. Therefore, select the system first and then enter
the room coordinates, and so forth.

Figure 1: The Select System dialog appears when the

software is launched.

Figure 2: The File New menu and system selection

Figure 3: Configuring flown subwoofers

D - 3

3 Integrating the
Subwoofers CDR 210 F
and CDR 210 C

See also chapter 5.3 in the Cohedra Compact™
manual to learn more on this.

Note:

The audio simulation does not take subwoofers into
account. This means that sound levels and dispersion
are calculated solely on the basis of the CDR 208
and/or 108 C mid/high units’ frequency range.
In order to add subwoofers to the mid/high array,
select the desired number of subwoofers (for example,
CDR 210 Cs) in the appropriate box on the left side
of the Setup panel. Flown subwoofers are always
configured as the first cabinet, that is, at the top
of the array.

At any time, you can select another cabinet from
among the models listed (for example, CDR 208 T, S
or CDR of 210 F) in the appropriate selection box;
subwoofers (CDR 210 F and CDR 210 C) may also
be selected. With the exception of rigs used for
extraordinary applications or special solutions, do
not configure arrays with subwoofers at the center.

3.1 Flying CDR 108 C Mid/­High Units with CDR 210 C
Subwoofers

As described in section 5.3 of chapter C, an additional
rigging frame must be attached to connect CDR 210 C
and CDR 108 C cabinets in order to fly them in a
common array. The same applies to ground stacks:
A rigging frame must be installed between the sub­woofers and mid/high unit to stabilize the stack.
This additional rigging frame is not shown in the
CAPS Setup and Rigging panels!

Tip:

If you want to simulate a Cohedra Compact™ system
in ground-stacked configuration, proceed as follows
(cf. Fig. 4):

• Select the desired number of CDR 108 C mid/high
units (for example, 4) without subwoofers.

• Select the Groundstack panel and align the stack
along the X axis.

• Select 0° in the Angle box. This aligns the rigging
frame along the horizontal plane.

• The number of CDR 210 C subwoofers determines
the ground stack’s elevation along the Y axis, that
is, its the height. Example: Say you want employ
three subwoofers as the base for a ground stack.
Each cabinet is 60 cm tall, yielding a height of

1.80 m (3 x 60 cm along the Y axis).

• Now you can align the mid/high units to the
audience area as described (cf. Fig. 5).

Version 2.0

Figure 4: Example ground stack

Cohedra™ Manual
Update

Setups with CAPS

Note:

See also section 7, chapter C of the manual, for a
description of the system setup procedure!
When stacking Cohedra Compact™ on the ground,
you have the option of tilting the lowest mid/high
unit up to 9° downwards to cover the front rows. To
simulate this down-tilt, enter the desired angle (1.5°,
3 °, 4.5°, 6 °, 7.5°, 9 °) as a negative value in the An­gle selection box. (Example: -4. 5 ° = 4.5° down-tilt).
Note that the entire stack with the rigging frames
tilts forward in accordance with the angle you have
entered. This procedure is necessary because the
current version CAPS 2.1.8 automatically adjusts an
angle of 0° between the rigging frame and mid/high
unit (this will be corrected in future versions).
Now select the angles between the second and
third mid/high unit, and so forth.

When setting up the actual ground stack, use the
pin labeled Set Angle to determine the down-tilt
angle between the rigging frame and the first
mid/high unit that you have simulated in CAPS. In
our example this is 4.5°. Ensure that all other angles
on the physical stack are adjusted to match the angles
simulated in the virtual stack on your screen!

Note:

In the Setup panel you can select the option Include
Bass Bin; when activated, it shows a side view of
CDR 210 Subs in a quad block. To get an accurate
picture of the rig, always deactivate this option
when simulating a ground stack.

Figure 5: Example of a down-tilt simulation for a Cohedra Compact™ ground stack