KLING & FREITAG CA 1215-9 User manual

KLING & FREITAG CA 1201, CA 1215, CA 1515
User's Manual
Important Information,
Please Read Before Use!
KLING &FREITAG GmbH
Junkersstrasse 14
D-30179 Hannover
PHONE [phone]
FAX [phone]
www.kling-freitag.de

User's Manual CA 1201, CA 1215-6 /-9, CA 1515-6 /-9
KLING & FREITAG GMBH ©2003 Page 3 of 68
Thank you for your decision to buy a KLING & FREITAG product. To guarantee a
trouble-free operating of the equipment and to enable the KLING & FREITAG
CA speaker system to achieve its full potential, please read the operating instructions
carefully before use.
With the purchase of a CA System, you have acquired a speaker system with the
highest possible quality and performance capabilities.
As the owner of this system, you now have a versatile and highly professional tool
which, when operated properly, is a true pleasure to use.
Symbols in User's Manual
Warning
This symbol indicates the possibility of life-threatening danger and a
health risk for persons. Not following these instructions may result in
serious health problems including potentially fatal injuries.
Attention
This symbol indicates a possibly dangerous situation. Not following
these instructions may cause minor injuries or cause property damage.
Important
This symbol gives instructions for the proper use of the described
products. Not following these instructions may cause minor injuries or
cause property damage.
Information about this User's Manual
User's Manual CA 1201, CA 1215-6 /-9, CA 1515-6 /-9 Version 1.1, 12.01.2004
© by André Figula, Kling & Freitag GmbH, July 2003; all rights reserved.
All specifications in this manual are based on information available at the time of pub-
lishing for the features and safety guidelines of the described products.
Technical specifications, measurements, weights and properties are not guaranteed.
The manufacturer reserves the right to make product alterations within legal provisions
as well as changes to improve product quality.
Please keep these instructions for future reference!
We appreciate any input with suggestions and improvements for this manual.
Please send this to us at the following address:
[email protected] or to:
KLING & FREITAG GMBH, Junkersstr.14, D-30179 Hannover
Phone +49 (0) 511 - 96 99 70, Fax +49 (0) 511 - 67 37 94

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KLING & FREITAG GMBH ©2003 Page 4 of 68
Contents
Chapter Page
1. General Instructions for Using Speakers 6
2. Product Descriptions and Versions 7
2.1 CA 1201 7
2.2 CA 1215-6 7
2.3 CA 1215-9 8
2.4 CA 1515-6 8
2.5 CA 1515-9 9
3. Instructions for Suspending the Speakers 10
3.1 Using the Ancra Flying Points 11
4. Coverage Angles of the CA Speakers 12
4.1 Changing the Coverage Angles 12
5. Proper Arrangement of the Loudspeakers 13
5.1 Arrayed Speaker Systems (Cluster) 14
5.1.1 Horn not rotated 14
5.1.2 With rotated Horn 15
6. Wiring 16
6.1 Connecting the Speakon Connector to the Terminal 16
6.2 Avoiding Ground Loops 17
6.2.1 What is a Ground Loop? 17
6.2.2 Avoiding Ground Loops 17
7. Configurations and Connecting Diagrams 18
7.1 Operating the Systems without C2 Controller 18
7.1.1 CA Systems in Full-Range Mode 18
7.1.2 Full Range Mode & Subwoofer with Crossover (XO) 19
7.2 Operations with C2 Controller 20
7.2.1 Full-Range Mode with K&F C2 Controller 21
7.2.2 CA System & Bass with Controller C2 in 2-Way Active Mode 22
8. Operating the Speakers 23
9. Directions for Models with 100V Transformers 24
9.1 Reasons for selecting speakers with 100V transformers 24
9.2 Connecting diagram for the 100V speaker inputs 24

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Chapter Page
10. Crossovers 24
10.1 Wiring Diagram CA 1201 24
10.1.1 Version A (old) 24
10.1.2 Version B (new) 25
10.2 Wiring Diagram CA 1215-6 and CA 1215 -9 26
10.2.1 Version A (old) 26
10.2.2 Version B (new) 27
10.3 Wiring Diagram CA 1515-6 and CA 1515-9 28
10.3.1 Version A (old) 28
10.3.2 Version B (new) 29
11. Touching Up Damage to Paint / Changing the Front Foam 29
12. Technical Specifications 30
12.1 CA 1201 30
12.2 CA 1215-6 31
12.3 CA 1215-9 32
12.4 CA 1515-6 33
12.5 CA 1515-9 34
13. Measuring Charts 35
13.1 CA 1201 35
13.2 CA 1215-6 41
13.3 CA 1215-9 47
13.4 CA 1515-6 53
13.5 CA 1515-9 59
14. Dimensions 65
14.1 CA 1201, CA 1215-6 and CA 1215-9 65
14.2 CA 1201-M, CA 1215-6-M and CA 1215-9-M 65
14.3 CA 1515-6 and CA 1515-9 66
15. Accessories for the CA Systems 67
16. Important Information for the 'Outdoor Installation' Option 68
17. Supplied Safety and Mounting Instructions for Speakers and Accessories

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1. General Instructions for Using Speakers
Mounting the speakers
To avoid injury or damage, always be sure to mount the speakers securely so that they
do not fall. Speakers, which are stacked, must be secured with safety straps. When
laying the connecting cables, make sure that nobody can trip.
Suspending as well as mounting the speakers to walls or ceilings must be carried out by
qualified personnel. The speakers must be hung by using at least two of the five desig-
nated flying points.
Never use signal cables for suspending or securing the systems. The same applies when
lifting and aligning the speakers.
Never hang more than two speakers under one another without using the designated
Kling & Freitag mounting devices.
Ensure that all installation connections comply with the applicable safety regulations and
that the size and strength are sufficient. Further instructions are in our user's manual for
assembly equipment and in the general safety instructions for speakers and assembly
equipment.
For mobile and fixed installations, use only assembly equipment from KLING & FREITAG.
Make sure to observe the installation instructions and safety notes shown in the user's
manual for assembly equipment.
Mounting equipment and speakers must be visually inspected on a regular basis. At any
sign of wear, fittings should be replaced immediately. Furthermore, all screwed connec-
tions should be checked regularly.
Do not Install Speakers in any of the Following Places:
−Where the speakers are permanently exposed to direct sunlight
−Where the speakers are exposed to high moisture
−Where the speakers are exposed to strong vibrations and dust.
Damage Caused by the Speakers' Magnetic Fields
Speakers are permanently surrounded by a magnetic field even when they are not oper-
ating. Therefore, during transport and placement of the speakers, it is important to
ensure that there is always approx. 1 m between the speakers and magnetic data media
and computer/video monitors.
Protecting the Speakers
When selecting power amplifiers, ensure that they have a sufficient power level. Power
amplifiers with an output level, which is too low, can cause the speakers to overload
(clipping).
Power amplifiers should never be overloaded. When the nominal power of the power
amplifiers is higher than that of the speaker, overload may ruin the speaker.
The input section of a power amplifier may be overloaded without displaying a clipping
signal, e.g. if the headroom of this circuit is too low. We recommend turning the level
controls to the maximum position and to adjust the level before the amplifiers.
The Following Signals may Damage the Speakers
−Permanent high-pitched signals with high frequency, and continuous noise from
feedback.
−Permanently distorted signals with high power.
−Noises, which occur when the amplifier is on while equipment is being connected,
disconnected or switched on.
Preventing Hearing Damage
To prevent the risk of hearing damage, avoid being too close to operating speakers
even if the volume level seems to be low enough.
Warning
Important
Attention

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2. Product Descriptions and Versions
2.1 CA 1201
Short description:
2-way full-range loudspeaker system with 12" low-mid chassis and 1" high frequency
horn on a rotatable 90° x 60° CD horn. Homogeneous coverage and constant direc-
tivity starting at 1.2 kHz. Integrated crossover with self-resetting protection circuit for
low-mid and high frequency way.
Enclosure:
Trapezoidal enclosure with additional cluster angles, 15 mm birch plywood, highly
stressable structured grey or black finish, internal mounting flange, 5 Ancra Jungfalk
flying points, 2 butterfly handles, highly permeable, ball proof steel grille with ex-
changeable black acoustic foam.
Optional models:
−CA 1201-M:
Enclosure with additional monitor angle
−CA 1201-100V:
100V version with 300 VA toroidal transformer
−CA 1201-SP:
Version with integrated power amplifier technology (not for CA 1201-M)
'SP' speakers are shipped with a separate user's manual!
−Special finish in RAL colours
2.2 CA 1215-6
Short description:
2-way high-power speaker system with 12" low-mid chassis and 1.5" high frequency
horn driver on a rotatable 65° x 50° CD horn. Homogeneous coverage and constant
directivity starting at 1.2 kHz. Integrated crossover with self-resetting protection circuit
for high frequency way, delay and phase optimisation.
Enclosure:
Trapezoidal enclosure with additional cluster angles, 15 mm birch plywood, highly
stressable structured grey or black finish, internal mounting flange, 5 Ancra Jungfalk
flying points, 2 butterfly handles, highly permeable, ball proof steel grille with ex-
changeable black acoustic foam.
Optional models:
−CA 1215-6-M:
Enclosure with additional monitor angle
−CA 1215-6 100V:
100V version with 300 VA toroidal transformer
−CA 1215-6-SP:
Version with integrated power amplifier technology (not for CA 1215-6-M)
'SP' speakers are shipped with a separate user's manual!
−Special finish in RAL colours

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2.3 CA 1215-9
Short description:
2-way high-power speaker system with 12" low-mid chassis and 1.5" high frequency
horn driver on a rotatable 90° x 50° CD horn. Homogeneous coverage and constant
directivity starting at 1.0 kHz. Integrated crossover with self-resetting protection circuit
for high frequency way, delay and phase optimisation.
Enclosure:
Trapezoidal enclosure with additional cluster angles, 15 mm birch plywood, highly
stressable structured grey or black finish, internal mounting flange, 5 Ancra Jungfalk
flying points, 2 butterfly handles, highly permeable, ball proof steel grille with ex-
changeable black acoustic foam.
Optional models:
−CA 1215-9-M:
Enclosure with additional monitor angle
−CA 1215-9-100V:
100V version with 300 VA toroidal transformer
−CA 1215-9-SP:
Version with integrated power amplifier technology (not for CA 1215-9-M)
'SP' speakers are shipped with a separate user's manual!
−Special finish in RAL colours
2.4 CA 1515-6
Short description:
2-way high-power speaker system with 15" low-mid chassis and 1.5" high frequency
horn driver on a rotatable 65° x 50° CD horn. Homogeneous coverage and constant
directivity starting at 1.2 kHz. Integrated crossover with self-resetting protection circuit
for chassis and crossover, delay and phase optimisation.
Enclosure:
Trapezoidal enclosure with additional monitor and cluster angles, 15 mm birch ply-
wood, highly stressable structured grey or black finish, internal pole mount flange, 5
Ancra Jungfalk flying points, 2 butterfly handles, highly permeable, ball proof steel
grille with exchangeable black acoustic foam, abrasion-proof plastic sliders.
Optional models:
−CA 1515-6-100V:
100V version with 300 VA toroidal transformer
−CA 1515-6-SP:
Version with integrated power amplifier technology (not for 1215-9-M)
'SP' speakers are shipped with a separate user's manual!
−Special finish in RAL colours

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KLING & FREITAG GMBH ©2003 Page 9 of 68
2.5 CA 1515-9
Short description:
2-way high-power speaker system with 15" low-mid chassis and 1.5" high frequency
horn driver on a rotatable 90° x 50° CD horn. Homogeneous coverage and constant
directivity starting at 1.0 kHz. Integrated crossover with self-resetting protection circuit
for chassis and crossover, delay and phase optimisation.
Enclosure:
Trapezoidal enclosure with additional monitor and cluster angles, 15 mm birch ply-
wood, highly stressable structured grey or black finish, internal pole mount flange, 5
Ancra Jungfalk flying points, 2 butterfly handles, highly permeable, ball proof steel grille
with exchangeable black acoustic foam, abrasion-proof plastic sliders.
Optional models:
−CA 1515-9-100V:
100V version with 300 VA toroidal transformer
−CA 1515-9-SP:
Version with integrated power amplifier technology (not for CA 1215-9-M)
'SP' speakers are shipped with a separate user's manual!
−Special finish in RAL colours

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3. Instructions for Suspending the Speakers
Only trained personnel should suspend speaker systems. Speaker systems, whether
single or connected to one another, must always be secured to a second separate point,
even if two rigging points are used for suspending the speaker system!
Ensure that all connections are secured to prevent their detaching on their own and that
only admissible statically tested and sufficiently sized connecting devices, ropes and
chains are used.
Pay attention to the required safety factors. Please follow the accompanying safety and
assembly instructions carefully as well as the corresponding national safety regulations.
A maximum load of 50 kg may be suspended from the two Ancra flying points of one
Speaker. This means a maximum additional load of 25 kg on each Ancra flying point.
Wrong:
−The suspended speaker weighs more than 50
kg. This exceeds the total load-bearing capacity
of the upper flying points.
As a result, a maxi-
mum of 2 full-range systems may be sus-
pended under one another.
−The rear suspension point can only support
weights up to 30 kg. The flying point is thus
not an appropriate secondary device to prevent
collapse if another speaker is mounted.
−The angle of the rope/chain in relation to the
top of the mounted speaker is less than 45°.
This causes the load on the flying points to ex-
ceed the permissible level.
Right:
−A two-point suspension was selected. Each
speaker is secured with an additional safety de-
vice.
−The suspended speaker weighs no more than
50 kg. This falls within the total load-bearing
capacity of the upper flying point.
−The angle of the rope/chain in relation to the
top of the mounted speaker is greater than
45°. This maintains a permissible load on the
flying points.
Warning

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3.1 Using the Ancra Flying Points
Warning
Flying Stud
Used as fastener to the Ancra
Flying Point.
Ancra Flying Point
Receptacle for special fasteners.
1.)
2.)
Take the flying stud in one hand... ... and push the locking device up
against the spring tension.
3.)
4.)
Put the flat head of the holding
bolt into the guiding of the flying
point.
Release the locking device when
the flying stud is located in the
middle of the flying point. Make
sure that the locking device clicks
into place.
5.)
6.)
Check that the flying stud is se-
curely fastened and cannot be
pulled out.
Please follow the accompanying
safety and assembly instructions
carefully!

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4. Coverage Angles of the CA Speakers
The mid-high systems can be operated in a vertical or horizontal (i.e. as a stage moni-
tor) position. The coverage pattern of the speaker can be adapted to special needs by
a 90° rotatable horn.
The table below shows the coverage angles of a standing speaker: To determine the
coverage pattern of the high frequency horn, shine a flashlight through the front
covering at the level of the horn. You will find a silver stripe that determines the posi-
tion and coverage angles of the horn.
DEFINITION:
Standing speaker:
Model
Horn not rotated
Horn rotated
CA 1201 90° h x 60° v 60° h x 90° v
CA 1215-6 65° h x 50° v 50° h x 65° v
CA 1215-9 90° h x 50° v 50° h x 90° v
CA 1515-6 65° h x 50° v 50° h x 65° v
CA 1215-9 90° h x 50° v 50° h x 90° v
4.1 Changing the Coverage Angles
To turn the horn, follow these steps:
1) Remove the four grille mounting screws on the top and bottom of the speaker with
a 3 mm socket head wrench and remove the grille from the speaker enclosure.
2) Remove the screws from the high frequency horn (also using a 3 mm socket head
wrench). Loosen the high frequency horn by using both hands, palms to the out-
side, to grasp into the horn and lift the horn with even pressure from the palms of
your hands towards the outside. Never use a screwdriver or similar objects to reach
behind the edge of the horn, as this could damage it.
3) Rotate the horn 90° and screw the horn on tightly again (do not force it!).
4) Screw the grille on tightly.
If the coverage angle needs to be changed often, make sure that the horn is not always
rotated in the same direction, as the connecting cable, when twisted, may causing the
contacts of the driver to become loose.

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5. Proper Arrangement of the Loudspeakers
Be aware of the fact that the logical targeted alignment of this high quality speaker
system can lead to a significant qualitative increase in the acoustic result. It is not possi-
ble to make generalities about the alignment of specific systems because the room has
a substantial influence on the signal and the audible result.
As a rule, the mid- and high-transducers of loudspeakers should be mounted above the
audience's face value, so that the sound distribution cannot be shadowed.
In many cases it is advisable to mount a loudspeaker higher, so that the sound will be
distributed throughout the room more evenly. Low standing systems result in a greater
difference in volume between front and back seats than higher standing systems.
Please note that this is only a general guideline and the best possible result may vary
from room to room.
To simulate the correct alignment of the speakers beforehand, there are various pro-
grams such as "Ease", "Ulysses". The Kling & Freitag speaker system data is available
for download on our homepage "www.kling-freitag.de".
The following graphics will assist in making a rough estimate as to the distance range of
the full-range speakers. The graphics only take into consideration the sum of the direct
sound and not the influence of the room. Because of this there can, in some cases, be
noticeable deviation.
Distance range of SPL (direct sound level):
0 dB
-6 dB
-12 dB
-18 dB
-24 dB -30 dB
2m 4m 8m 16m 32m 50m
-34 dB
Important

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5.1 Arrayed Speaker Systems (Cluster)
If the loudspeakers are operated through the optional K&F C2 System Controller, we
recommend turning on the 'Top Low Cut' switch for clustered operation. Thus the fre-
quency response for this application can be optimised (see also K&F C2 User's Manual).
When operating the systems without the K&F C2 System Controller in a clustered con-
figuration, the signal level of frequencies below 300 Hz should be reduced by 3-4 dB.
5.1.1 Horn not rotated
*If several 90° systems are clustered, unwanted interference effects may appear. As a
result, we do not generally recommend clustered configurations of CA 1201, CA
1215-9 and CA 1515-9 systems. If wide angles are to be covered, we recommend the
use of several 60° or 65° systems in one cluster.
Important
Horn not
rotated
Standing speaker
A smaller angle 3
results in a smaller
vertical coverage
angle but increases
the sound power
level.
Combination Angle 1 Angle 2 Angle 3
CA 1201 with
CA 1201
55°-65°
(not generally recommended *) 20°-35
CA 1215-6 with
CA 1215-6 40°
CA 1215-6 with
CA 1215-9 45°
CA 1215-9 with
CA 1215-9
50°-60°
(not generally recommended *)
CA 1515-6 with
CA 1515-6 40°
CA 1515-6 with
CA 1515-9 45°
CA 1515-9 with
CA 1515-9
50°-60°
(not generally recommended *)
20°-30°
Application Increasing the hori-
zontal coverage an-
gle, e.g. for wide
audience planes
Increasing the hori-
zontal coverage angle
and sound power
level for larger dis-
tances
Increasing the verti-
cal coverage angle,
e.g. for covering
balconies or for
increased sound
power level for
larger distances
Angle 1
Angle 2
Angle 3

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5.1.2 With rotated Horn
Horn rotated
Standing speaker
A smaller angle 3
results in a smaller
vertical coverage
angle but increases
the sound power
level.
Combination Angle 1 Angle 2 Angle 3
CA 1201 with
CA 1201 35° Not recommended
CA 1215-6 with
CA 1215-6 30°-40°
CA 1215-6 with
CA 1215-9 30°-45°
CA 1215-9 with
CA 1215-9 Not recommended
CA 1515-6 with
CA 1515-6 30°-40°
CA 1515-6 with
CA 1515-9 30°-45°
CA 1515-9 with
CA 1515-9
30°
Not recommended
Application Increasing the hori-
zontal coverage an-
gle, e.g. for wide
audience planes
Increasing the hori-
zontal coverage angle
and sound power
level for larger dis-
tances
Increasing the verti-
cal coverage angle,
e.g. for covering
balconies or for
increased sound
power level for
larger distances
Important
Angle 3
Angle 2
Angle 1

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6. Wiring
The speaker is equipped with two parallel Speakon connectors.
Make sure that all units are switched off and all controls are turned down before con-
necting your CA systems.
−We recommend the use of high-quality speaker cables provided by KLING & FREITAG.
−For connections to the power amplifier inputs, please use 2-pin shielded microphone
cable with high-quality connectors.
−Avoid ground loops (see chapter 6.2)
−Please pay attention to the respective pin diagrams in this manual!
−Make sure that the +/- polarity of the speakers at the amplifier is correct. When simul-
taneously using power amplifiers from different manufacturers, be sure to use the
correct specific pin configuration. It may be necessary to modify the pin configuration
on the power amplifiers or on the connectors leading to them.
−Upon completing the wiring, ensure that the connected speaker channels are work-
ing in phase. To do so, use i.e. a phase checker. A phase error can also be recognized
when the connected channels are used simultaneously. During simultaneous use the
bass frequencies become notably quieter or the mid-frequencies such as voices can-
not be located.
−To avoid loss of power, the cables should have a minimum wire gauge of 2.5 mm² -
more for longer cabled distances. A minimum wire gauge can be easily calculated
with the following formula:
Make sure that the optional XLR type connectors with the exposed male connec-
tors are used as input. This is the only way to provide contact safety from dan-
gerous currents!
If several loudspeakers are connected, the signal can be linked through from one loud-
speaker to the next. Please make sure that the total impedance of the loudspeakers R(Ω) is
not lower than the minimal impedance indicated on the power amplifier.
1/R1 + 1/R2 + 1/R3 + ... = 1/Rtotal
6.1 Connecting the Speakon Connector to the Terminal
2.
1.
3.
1.
2.
Important
Warning
Important
Minimum Wire Gauge (mm²) = Required Cable Length (m) __
2 x Speaker Impedance (Ω)

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6.2 Avoiding Ground Loops
6.2.1 What is a Ground Loop?
Every component of a P.A. or Hi-Fi System has its own internal 0 V reference (ground).
This point is often connected to the protective earth connector (PE / Ground). If two or
more units are connected to one another with a line level audio cable, there may be a
ground connection through the ground of the power supply cable (yellow-green) as well
as through the shielding of the audio cable. The voltage difference between these two
ground points causes audible interference to come from the speaker.
6.2.2 Avoiding Ground Loops
If there is a loud humming or buzzing after the CA System has been connected, then
check that a "ground loop" has not been built into the system. Some power amplifiers
and system controllers are equipped with a "Ground Lift" switch. Set these switches to
the "Lift" position one after the other. If the noise is still audible, check if,
1. the noise is caused by a ground loop before the power amplifiers / controllers
(e.g. mixing console, effects or equalizers).
2. the system or parts of the system are connected to an "unclean" power supply
- meaning one, which is also running large motors, or lighting systems. An "un-
clean" supply voltage, electrostatic and electromagnetic fields can cause a
malfunction.
Please observe the following basic rules:
−Never!!! try to avoid a ground loop by disconnecting or taping the ground
contact at the power connector! Extremely dangerous!
−If possible, only use high-quality audio appliances with balanced signal outputs and
with power cables with PE connectors.
−Use high-quality cables with good shielding.
−The point of ground for all connected components should merge at one central
point. The power connections should lead out in a radial manner from one point
and not be linked from one unit to the next.
−When installing appliances that create strong electrostatic or electromagnetic fields
(large transformers, switch-mode power supplies), maintain some distance from
other audio appliances. In extreme cases, the only solution is to create a completely
independent "audio ground"; in other cases, it is sufficient to connect a filter in
front of the audio equipment.
Important
Warning
Important

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7. Configurations and Connecting Diagrams
7.1 Operating the Systems without C2 Controller
The full-range system can be used alone or in conjunction with a K&F sub-woofer with
integrated crossover (e.g. SW 112-XO / SW 115D-XO or SW 118E-XO). In this mode of
operation the crossover limits the sub-woofer's frequency range.
7.1.1 CA Systems in Full-Range Mode
This mode of operation is ideal for speech applications and music applications without
the need for a high bass content. Should more bass be needed, the bass level can be
increased between 50 and 80 Hz at the mixing console.
INPUT CH 2 INPUT CH 1
OUTPUTS
CH 2 CH 1
-
+
-
+
INPUT e.g. from
mixer, AUX or
Connector Panel
If you are operating a mid-high system in a cluster (speakers arranged in close prox-
imity) reduce the frequencies below 300 Hz by 3-4 dB! (The K&F C2 Controller has a
'top-low cut' switch for this purpose.)
Important

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7.1.2 Full Range Mode & Subwoofer with Crossover (XO)
In this mode of operation you can easily realise applications, where a higher bass level is
needed.
Recommended combinations of the CA Systems, as described here, with K&F Bass Sys-
tems:
2 CA Systems + 2- 4 x SW 112-XO
2 x SW 115D-XO
1 - 2 x SW 118E-XO
INPUT CH 2 INPUT CH 1
OUTPUTS
CH 2 CH 1
-
+
-
+
INPUT e.g. from
mixer, AUX or
Connector Panel
Switch To 'XO ON' Switch To 'XO ON'
The switch "XO" on the connecting terminal of the sub-woofer must be at "ON" or, for
different versions, at "PASSIVE" for this mode of operation.
Connecting Terminal 1 Connecting Terminal 2
When using the mid-high systems in a cluster (speakers in close proximity), reduce the
frequencies below 300 Hz by 3-4 dB. (The K&F C2 Controller is equipped with a special
filter for this purpose, which can be activated by pressing the "Top Low Cut" switch.
Important

User's Manual CA 1201, CA 1215-6 /-9, CA 1515-6 /-9
KLING & FREITAG GMBH ©2003 Page 20 of 68
7.2 Operations with C2 Controller
By using carefully adjusted filters (EQ) on special system cards for the CA Systems, the
C2 Controller optimises feedback prevention and the frequency response of the spea-
kers.
The controller provides optional bass boost in full-range mode, optimisation for cluster
operation (Top Low Cut switch), high boost and sub-mono functions.
The C2 Controller optimises the operating safety of the speakers and power amplifiers
by using special peak and RMS limiters in Sense Technology:
With other (universal) controllers, the gain of the selected power amplifiers
must be known. The limiter on the C2 Controller, on the other hand, uses a
special control circuit to determine the actual output voltage of the power
amplifiers. The limiter then reduces the input level only when the power am-
plifier actually provides more power than the speakers can handle. The ampli-
fier's gain and the position of the input level control for the power amplifiers
are insignificant for the limiter function of the C2 Controller.
C2- Power amplifier with
Controller input level control
Limiter
Measured value
(output voltage of
the power amplifier)
Universal Power amplifier with
Controller input level control
Limiter
Fixed value, depending on the amplifier's gain and the
position of the input level control of the power amplifier.