KS AUDIO CA 4D User manual

USER MANUAL
C
A 4D
|
4 CHANNEL POWERAMP
Thank you for purchasin professional KS AUDIO
product. Please carefully follow the instructions in
this manual to ensure lon , trouble-free use of your
equipment.

CA 4D |4 CHANNEL POWER AMP
CA 4D |OPERATING INSTRUCTIONS 1 | P a g e
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
. Do not block any ventilation openings. Install in accordance with the manufacturer’s
instructions
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus
(including amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug.
10. Protect the power cord from being walked on or pinched particularly at plugs, convenience
receptacles, and the point where they exit from the apparatus.
11. Make sure the power cord remains readily accessible at all times.
12. Only use attachments/accessories specified by the manufacturer.
13. Unplug this apparatus during lightning storms or when unused for long periods of time.
14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has
been damaged in any way, such as power-supply cord or plug is damaged, liquid has been
spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or
moisture, does not operate normally, or has been dropped.
15. It is in your responsibility to ensure that our products comply to regional regulations and
standards
To prevent electrical shock, do not
remove top or bottom covers. No
User serviceable parts inside.
Refer servicing to qualified service
personnel.
SHOCK HAZARD
DO NOT OPEN!

CA 4D |4 CHANNEL POWER AMP
CA 4D |OPERATING INSTRUCTIONS 2 | P a g e
CONTENTS
PROLOGUE ........................................................................................................................ 3
QUICKSTART ..................................................................................................................... 4
COMPONENTS .................................................................................................................. 5
CONTROLLER CARD MODULE FOR CA 4D ........................................................... 5
SIGNAL ............................................................................................................................................ 5
EQUALIZATION ............................................................................................................................ 6
SPECIAL HIGHLIGHTS FOR THE SIGNAL PROCESSING .................................................... 6
CROSSOVER ................................................................................................................................... 6
POWER AMPS ........................................................................................................ 7
TECHNOLOGY...............................................................................................................................
POWER SUPPLY ............................................................................................................................
COOLING ........................................................................................................................................ 8
PROTECTION SYSTEMS .............................................................................................................. 8
OPERATION........................................................................................................... 9
F MOD DIGITAL CONTROLLER CARD ................................................................................... 9
AUDIO CONNECTORS – LINE IN/OUT ................................................................................... 9
UNBALANCED INPUT CONNECTIONS .................................................................................. 9
POWER-OUTPUTS /SPEAKON ................................................................................................. 9
OUTPUT MODES ....................................................................................................................... 10
OUTPUT MUTE SWITCHES ..................................................................................................... 11
POWER TRANSFORMER .......................................................................................................... 11
POWER SUPPLY ......................................................................................................................... 11
SPECIFICATIONS ............................................................................................................. 13
DIMENSIONS ................................................................................................................... 14
CLEANING OF AMPLIFIER ............................................................................................... 15
TRANSPORTATION ......................................................................................................... 15
LIMITED WARRANTY ...................................................................................................... 16
EC DECLARATION OF CONFORMITY .............................................................................. 17
APPROPIATE USE OF YOUR EQUIPMENT ...................................................................... 18
NOTES .............................................................................................................................. 19
CONTACT......................................................................................................................... 19

CA 4D |4 CHANNEL POWER AMP
CA 4D |OPERATING INSTRUCTIONS 3 | P a g e
Prologue
Thank you very much for your confidence in our product line-up and purchasing professional KS
AUDIO sound reinforcement tools !
Please read this manual carefully and do not hesitate contacting KS AUDIO headquarter having
further questions depending the utilization of your product!
The CA 4D is a 4 channel, 2100 watt MOSFET amplifier driven into 4 ohms with control card system
configuration technology using an optinal, digital controller card exclusively supporting the KS
Audio FIRTEC finite impulse response technology. When changing controller cards or when
downloading a new program via USB, both the inputs and the outputs are appropriately
configured to reflect the correct set up.
There are 5 basic program settings: - 4 single channels - 2 channel / 2 way - 2 channel with mono
Sub woofer - 2 channel mono bridged high power sub woofer - 1 channel 3 way. This manual
should help you to easily use this product. Please read the manual before using this amplifier.

CA 4D |4 CHANNEL POWER AMP
CA 4D |OPERATING INSTRUCTIONS 4 | P a g e
MAIN SWITCH
POWERCON INPUT
FUSE
Quickstart
No e: Please check when opening he package ha here is no obvious damage
due o shipmen , which could be harmful o he produc or he opera or.
The CA 4D is a 4 channel, 4,000 watt MOSFET amplifier driven into 4 ohms per channel. Also
inclusive, is a system controller card technology that is available in an analog or digital controller
card format.
Exclusively implemented on the digital controller card called F MOD, is the KS Audio FIRTEC® (Finite
Impulse Response technology) process. Both the audio inputs and outputs are appropriately
configured to the configuration selected on F MOD. CA 4D amplifier allows for a wide field of
applications, from large concert-size sound reinforcement, to speech, producing the highest
quality of audio possible, every time, including major recording studios as well as other commercial
and industrial applications.
Virtually every configuration is possible, including: 2 way bi amplified, 2 channel out high-power
bass bridge with additional active cross over outputs, 3 way Tri-amplified, 4 channel full range, and
more!
The CA 4D power amplifier using F MOD controller card comes equipped with all speaker setups.
Please cross check and make sure the program loaded is the one you need for the speaker
configuration you want to run it with. Please connect the input signal and the speaker outputs on
the backside of the amplifier, while the amp is not yet switched on, and make sure you are aware of
the explanation as listed for the digital controller program, when using the F MOD digital controller
card. The supplied power cord is a Neutrik®-PowerCon AC cable. It is connected to an AC power
XLR INPUT/OUTPUT
MUTE SWITCHES
STAND BY
OPTIONAL
F MOD
CONTROLLER
SPEAKON/POWER
OUT

CA 4D |4 CHANNEL POWER AMP
CA 4D |OPERATING INSTRUCTIONS 5 | P a g e
supply module that has a wide voltage range and automatic power switching mode, it operates
between 100 and 250 VAC.
Please connect the power cord to power outlets that are surge protected and properly grounded.
Once all cables have been double checked along with their terminations, please go ahead and
adjust the volume of the input signal to a low setting and activate the MAINS switch to its ON
position. When using the digital controller, after a few seconds the LCD display on the front panel
of the power amplifier will confirm the ready status of the power amp. We recommend o no use
any o her connec ors han original Neu rik® produc s.
If you do not want to use the power amp for a relatively short period of time, you can deactivate
the amp by selecting it’s STAND BY function, or by turning the knob on the digital controller so that
the STAND BY function is displayed in the LCD and press the knob for 3 seconds. After you have
switched the amplifier to ON, a "soft start" is activated. This is to protect the systems and all the
components involved. Once the electronic protection circuits have confirmed that the system is
running under normal conditions, the green “READY” light is illuminated to indicate ON, or the LCD
display on the digital controller card will confirm the ready status. Now, the CA 4D is ready to
operate.
There are 4 mute switches corresponding to the 4 audio channels on the amplifier, each of these
switches has 1 red LED located below it to indicate the channel mute status. When the LED is ON
the channel is muted. This feature is useful in many ways, such as when using this amplifier with
monitors, you can mute individual mixes when they are not needed or, when tracking down
problems.
COMPONENTS
CONTROLLER CARD MODULE FOR CA 4D
SIGNAL
The handling of the signal, like equalization, crossover and corrections of the transient behavior of
the components, are taking place entirely in the integrated analog controller card or the F MOD
digital controller card, and these two cards are interchangeable. KS Audio offers a wide selection of
analog controller cards and numerous programs for the F MOD digital controller card, assuring
best results no matter which driver configuration is to be handled. All programs feature the
automatic adjustment and configuration of the output channels and their output signals, including
the limiting the signal supplied to the speakers.
There are 5 basic program settings:
4 single channels
2 channel / 2 way
2 channel with mono subwoofer
2 channel mono bridged high power subwoofer
1 channel 3 way
All KS Audio products have balanced inputs and outputs.
In the F MOD digital controller card, all of the signal processing is entirely done in the digital
domain. The digital connection is AES 3. High-end 24/2 bit Sigma-Delta A/D converters are gain
stacked along with a 64 times over sampling and a A-rated signal to noise ratio of >110dB to
handle the A/D function. The CA 4D accepts analog input sources as well.

CA 4D |4 CHANNEL POWER AMP
CA 4D |OPERATING INSTRUCTIONS 6 | P a g e
The digital signals are processed by a floating point DSP. This DSP converts the 24 bit wide
integrated data files in a flow word of 32 bit mantissa to an 8 bit exponent, equaling a theoretical
dynamic range of 1500 dB. Overloads, scale noise, and rounding noise are impossible at this
resolution. The parameters available for adjustment, such as Delay and Room Equalization, have
direct access to the floating point of the digital signal processing which eliminates mistakes in
scaling.
EQUALIZATION
The most important function of the controller is to assure a flat frequency response and positive
phase relationship. In the course of preparing those programs every sound configuration had to
undergo numerous test runs in order to take measurements to evaluate and to determine the
many different conditions and solutions possible. This results in the best programs with optimal
results for each driver. KS Audio developed a FIR® (Finite Impulse Response) technology to create
the inverse frequency response and operate this via an onboard DSP engine comparing input
signals against programs pertinent to the cabinet and it's components, in order to execute a
complex digital filtering process. This results in the optimal equalizations for each driver/box and
system.
Additional to all this, the sound engineer is free to adjust the sound for a certain application and
venue by adjusting the program parameters such as “Shelving” and “Low Cut” filters. Please check
the program parameters for full details.
SPECIAL HIGHLIGHTS FOR THE SIGNAL PROCESSING
A short impulse in an analog equalizer is extended in the time domain and creates in the output
stage of the equalizer a post-oscillation of the impulse response. On top of all this, the mass of the
driver creates an additional post-oscillation initiated by the same impulse. Combined together
these changes in signal-motiontiming at the output stage leaves little in common with the original
signal. KS Audio developed the FIR (Finite Impulse Response) filtering technology, called FIRTEC ®.
This technology removes any of the delay time distortion and handles the time domain as well as
the frequency response.
The correction of the input signal is done immediately in the time domain, through a mathematical
convolution of the input signal and the impulse response of the digital equalization filters.
Conversely, traditional analog filter / equalizer technology tries to correct the frequency response
of the signal through various filter elements which degrades the original impulse signal response.
The new digital FIRTEC ® technology equalizes the signal immediately and corrects it to exactly
match the original impulse. This is a physical equalization of the frequency response in volume and
phase.
CROSSOVER
In reality, the analog filtering process tries to correct the frequency response of the audio signal
through various filter elements and as a result, degrades the quality of the signal’s impulse
response. The FIRTEC ® technology digitally equalizes the input signal immediately and corrects the
actual impulse of the signal. This is a physical equalization of the frequency response in volume
and phase. The cross over is optimized to be linear for frequency and phase (Bessel Filter). In analog
systems, phase shifts exist in between crossover points which can produce a result of near
cancellation of the sound pressure between systems when running various speakers in parallel (2-
way / 3-way systems). The KS Audio FIRTEC ® technology is based on a combined Bessel filter and
Differential filter process to yield superior results. This means the high frequency response is the
result between the low pass filter and the input signal. In consequence the result is an optimal
addition between the high and the low frequency cross over points. Instead of a phase shift as

CA 4D |4 CHANNEL POWER AMP
CA 4D |OPERATING INSTRUCTIONS 7 | P a g e
3.VoltageofSCRIPT1,Level(Phase)
20 50 100100 200 500 1k1k 2k 5k 10k10k 20k20 20k
0 0
-1
0 -10
-2
0 -20
-3
0 -30
-4
0 -40
0 0
10 10
-180° -180°
-90° -90°
0° 0°
+90° +90°
+180° +180°
Frequency Hz
dB dB
AkAbak (R)
Uin=0.707Vrms
lp1000, N=1=0, U1
hp1000, N=1=0, U1
2.VoltageofSCRIPT1,Level(Phase),Uin=0.707Vrms;lp140,N=1=0,U1
2.VoltageofSCRIPT1,Level(Phase),Uin=0.707Vrms;hp140,N=1=0,U1
found in an analog cross-over, in the KS Audio digital process, the time domain of the low pass
signal is only considered, and the rest of the process follows this.
Importantly, the geometrical offset between the drivers is compensated for and the resulting
output is sample accurate to the input in the time domain. To assure the best possible equalization
of the entire system the FIR filters work with the entire signal path not just the individual frequency
range: the critical cross-over between high and mid frequency drivers are precisely corrected.
The measurements taken to program the FIR filters are taken using a completely finished speaker
enclosure so this measurement includes the characteristics of the speaker box itself. This operation
allows each speaker box to be measured and programmed individually in production as well as in
the final venue when the room acoustics are “built-in”, then the FIR filters can adjust for this as well.
A correct impulse response is the key to duplicating the audio image in terms of the depth, as well
as the correct orientation of the instruments in a room.
POWER AMPS
TECHNOLOGY
Channel 1 and 3 provides a sine wave power of 600W to 4 ohms, the channels 2 and 4 each 300W.
The delivered overall performance is determined by the controller used. Optimal performances
available: e.g. to operate a 3-way speaker system 600W / 8Ohm + 300W / 8Ohm + 150W / 8 ohms.
The high efficiency of the CA 4D is carried by three operating voltages reached. The power loss is
thereby much lower than conventional power supplies.
A total of 2 hand selected power transistors, each featuring a Pmax=250watts for maximum
headroom. Soft clipping circuits working in conjunction with the operating voltage, limit the audio
signals in front of each power amp, which enables the power amp to always operate with a high
damping factor while remaining fully regulated.

CA 4D |4 CHANNEL POWER AMP
CA 4D |OPERATING INSTRUCTIONS 8 | P a g e
POWER SUPPLY
The power supply is a state-of-the-art, heavy duty and wide-range switch mode design, with
Power-Factor- Correction (PFC) built in. The start-up voltage is limited to assure maximum
protection. A second widerange and heavy duty switch mode power supply, with PFC, is used to
independently supply the controller card electronics along with the low voltage cooling fans and,
the stand-by ON/OFF system, via the KS Audio remote digital controller system.
COOLING
In the production of high audio output levels, large amounts of heat are also generated as a side-
product of the amplifier, which could damage the semi conductors. The reduction of these high
temperatures is done with the use of 3 independent, thermal controlled cooling fans. The air is
taken in from the front panel inlet of the power amplifier and passed through to the back panel
outlet while passing over the heat fins and power transformer to actively cool these units down to
nominal operating temperatures.
PROTECTION SYSTEMS
As a KS Audio standard of operation, the input signal to the amplifier is effectively limited to
protect the drivers. On powering up the CA 4D amplifier a 20 Amp switch-on relay circuit is
engaged to ON to protect the drivers. If the DC current changes by more than 0.5 V, a special
detection circuit disconnects the speakers from the amplifier for their protection. The same
protection takes place if electrical shortage or low impedance occurs. When the cause is remedied
the circuits return to their full operational status.
If the internal heat increases above 85 C (185 F), protection is engaged to deactivate the power
amps for as long as it takes for the cooling fans to reduce the temperature to 85 C (185 F) again.
Overheat status will be indicated by a RED ERROR LED light and the power READY light is dimmed.
Also, during this protected time, information appears in the LCD display pointing out the problem.
The LCD display is only available when F MOD controller card is inserted in the amplifier.

CA 4D |4 CHANNEL POWER AMP
CA 4D |OPERATING INSTRUCTIONS 9 | P a g e
OPERATION
KS AUDIO recommends using KS AUDIO SYSTEM-AMPS with KS AUDIO SYSTEM-
OUDSPEAKERS only! If not, it may damage parts of equipment.
F MOD DIGITAL CONTROLLER CARD
Please check details in the F MOD controller card manual.
AUDIO CONNECTORS – LINE IN/OUT
All line/audio input and output connections are a balanced electronic type conforming to the XLR
international standard, nominal 20 KOhms for matching to a typical 50 ohm impedance line output
(grounding is on pin #1). For very long cable run
installations, a transformer-balanced output is
preferable to avoid ground differentials and 60 Hz
hum loops over mixed type cable runs. The
impedance is 2 x 10kOhm and is discreet
(independent for pin 2 and 3). Multiple devices can
share the same input signal by using the male-female
sockets as a daisychained audio link. A total of only 1 dB of signal loss on the input signal is seen
when up to 20 devices are sharing the same input signal. Digital AES/EBU lines should be run with
110 Ohm cable impedance. You can daisy chain as many products you wish, as the XLR male
outputs feature an active line transmitter.
UNBALANCED INPUT CONNECTIONS
C
able should be connected to Pin1 and
Pin3 of XLR socket when audio is input
under unbalanced. However, the best way
is to connect Pin3 to the shielding line,
which will probably bring interference.
KS AUDIO recommends employing
"balanced inpu connec ions”.
POWER-OUTPUTS /SPEAKON
There are 4 Neutrik®-Speakon speaker level output connectors. These 4 audio outputs are
configured automatically by the controller card selected for the system. The bi-amp mode is +1 /-1
for the lows/mids and +2 /-2 for the tweeter. In bridge mode for high-power-subwoofer
applications one amp is on +1/+2 while the other amplifiers runs as -1/-2. The selected

CA 4D |4 CHANNEL POWER AMP
CA 4D |OPERATING INSTRUCTIONS 10 | P a g e
configuration is indicated through green LED’ s located next to each of the 4 outputs. For example
configurations refer “OUTPUT MODES”- able on page 10.
KS recommends he use of 4 conduc or, 12 gauge cable for all speaker o
amplifier connec ions for op imal performance .
Warning – be cer ain ha all speaker cables are wired iden ically a each end.
Two amplifiers being bridged oge her can crea e fa al damage o he
drivers. We recommend o no use any o her connec ors han original Neu rik®
produc s.
OUTPUT MODES *
F MOD - MODE
SPEAKER
CONFIGURATION
EXAMPLES
GREEN STATUS LED
POWER OUT
CHANNEL
4-CHANNEL PASSIVE
4 X SPEAKER
PASSIVE
ALL LEDS OFF
POWER OUT
1,2,3,4*
2-CHANNEL BRIDGE
MODE
2 X SUBWOOFER
BRIDGE MODE LEDS
CH2 + 4 ON*
POWER OUT
2 +4*
2-CHANNEL BIAMP MODE
2 X TOP SPEAKER
BIAMP
BIAMP MODE LEDS
CH1 + 3 ON*
POWER OUT
1 + 3*
1-CHANNEL BRIDGE
MODE + 1-CHANNEL
BIAMP MODE
1X SUBWOOFER
BRIDGED
1 X TOP SPEAKER
BIAMP
BRIDGE MODE LEDS
CH2 + 4 ON*
BIAMP MODE LEDS
CH1 + 3 ON*
POWER OUT
2 + 4 BRIDGE MODE*
POWER OUT
1 + 3 BIAMP MODE*
1-CHANNEL BRIDGE
MODE + 2-CHANNEL
PASSIVE MODE
1 X SUBWOOFER
BRIDGED
2 X TOP SPEAKER
PASSIVE
BRIDGE MODE LEDS
CH2 + 4 ON*
LEDS
CH 1 + 3*
POWER OUT
2 +4*
POWER OUT
1 + 3 *
* Inpu s and ou pu s can be freely assigned via F MOD, so inpu and ou pu
channels may vary depending on your programming.

CA 4D |4 CHANNEL POWER AMP
CA 4D |OPERATING INSTRUCTIONS 11 | P a g e
OUTPUT MUTE SWITCHES
A very practical feature when running larger sound systems are the 4 mute switches - one per
channel – on the front panel of the power amplifier. The red LED indicates the MUTE is ON or
activated. Each amplifier output can be isolated. There is also a green "signal present LED" that
indicates any audio source above - 30dB. In the KS Audio F MOD digital controller card, mute
switches are available in the selected program. In this case “ACTIVE” means that the output is
activated, not that the MUTE is active.
POWER TRANSFORMER
If you run very long power line feeds, especially when using different power circuits, a balancing
power transformer should be utilized to avoid ground hums. This will also help to avoid electro-
magnetic interference caused by generators or lighting fixtures and dimmer circuits. Please note,
on KS systems, the digital signals always have an input transformer and separate transformer
output built-in.
POWER SUPPLY
The KS Audio CA 4D power amp uses a state-of-the-art, heavy duty and wide-range switch mode
design, with Power-Factor-Correction (PFC) built in. This power supply will accept any AC input
from 96 – 250v, 50 / 60Hz. It is connected via a Blue Neutrik®-PowerCon AC connector with
protective leader.

CA 4D |4 CHANNEL POWER AMP
CA 4D |OPERATING INSTRUCTIONS 12 | P a g e
As the power amplifier unit is properly grounded, please ensure, for your own safety, that the
power circuit you are plugging into is properly grounded as well. KS Audio amplifiers are very
efficient, therefore, the demand for electricity is quite low. Please Note: Be sure that the actual
current draw for all speakers on the supply circuit do not exceed the maximum fuse rating on each
speaker. After switching the amplifier on with the MAINS switch, a soft-start is activated first. This is
to protect the system and all the components involved.
Once the electronic protection circuits have confirmed that the system is running under normal
conditions, the outputs are activated and the amplifier is ready to operate. The power supply is a
state-of-the-art, heavy duty and wide-range switch mode design, with Power-Factor- Correction
(PFC) built in. The start-up voltage is limited to assure maximum protection.
A second widerange and heavy duty switch mode power supply, with PFC, is used to
independently supply the controller card electronics along with the low voltage cooling fans and,
the stand-by ON/OFF system, via the KS remote digital controller system.

CA 4D |4 CHANNEL POWER AMP
CA 4D |OPERATING INSTRUCTIONS 13 | P a g e
SPECIFICATIONS
CA 4D (wi hou con roller module)
number of channels 4
frequency response + / -1dB 5 – 50,000Hz
output power per channel 2x 00W, 2x 350W peak at 4 Ohms
output impedance min. 2 ohms per channel
power supply switchmode power supply with PFC
mains voltage powercon input (100/250VAC)
amplification mode Class H MOSFET, 3 rails supply
input connectors 4x XLR3 in, 4x XLR3 out
output connectors 4x speakon NL4
cooling 3 fans, speed controlled
case stainless steel
finish charcoal black
dimensions (height x width x depth) 2U / 19“ / 350mm(13.8“)
weight (without options) 14 kg / 31 lbs
features mounting slot for various KS Controller-Modules

CA 4D |4 CHANNEL POWER AMP
CA 4D |OPERATING INSTRUCTIONS 14 | P a g e
DIMENSIONS

CA 4D |4 CHANNEL POWER AMP
CA 4D |OPERATING INSTRUCTIONS 15 | P a g e
CLEANING OF AMPLIFIER
The fitted mesh filters ( foam) for the the cooling system should be reguarly cleaned to maximize
the air flow into the unit.
TRANSPORTATION
KS products are tools for daily professional use and are correspondingly robustly manufactured.
You should, however, be aware of these aspects of note:
As with all types of electronic devices, condensation and moisture must be avoided i.e. when the
speaker comes from a cold and humid truck and is brought into a warm venue, give the system as
much time as possible to heat up to venue temperature before powering on.
Of course, direct exposure to liquids is never safe and should be prevented at all times. The
vibrations of a transport vehicle are safe - all components and cabinetry are well assembled,
secured with screwed or bolted parts for extra strength where necessary.
It has however been shown that train or airplane transport without further packaging creates un-
due stress on KS products. We recommend for such situations shock resistant flight cases.
Significant contamination by dust, etc. is dangerous for Electronic assemblies as it may cause a
short circuit. It is therefore advisable, that the devices are periodically opened, and cleaned out
with compressed air.

CA 4D |4 CHANNEL POWER AMP
CA 4D |OPERATING INSTRUCTIONS 16 | P a g e
LIMITED WARRANTY
Without any exception, KS AUDIO professional products will be sent out in strict accordance with
long-time final inspection and under permanent quality control during manufacturing process by
dedicated specialists.
When receiving freight, please check your delivery on shipping damages, out – and inside
immediately. Product defects have to be reported to the shipping company immediately after
detection and to KS AUDIO headquarter within eight days.
24 month limited warranty of manufacturer to the exclusion of all further claims and the following
obligations:
•Exchange or repair of defect devices whenever not subject of external damage, vandalism
or misuse or by an act of god.
•Exchange of entire product if repair deadline may exceed four weeks respectively fails
second time.
•Exclusion of manufacturer’s warranty whenever devices opened respectively customized
by third parties non factory-authorized
•The warranty card shipped within the package is subject of all repairs done in KS AUDIO
headquarter or factory-authorized service points.
•Freight costs generally to be paid by customer
Hettenleidelheim 11/14/2016
(Dieter Klein, CEO / KS Beschallungstechnik GmbH)

CA 4D |4 CHANNEL POWER AMP
CA 4D |OPERATING INSTRUCTIONS 17 | P a g e
EC DECLARATION OF CONFORMITY
Within the meaning of low voltage directive (LVD) 2006/95/EC furthermore electromagnetic
compatibility directive (EMC) 2014/30/EU
We hereby declare that the equipment designated below is designed and built in the version sold
by us in such a way as to comply with the relevant fundamental safety and health criteria of the
applicable EC respectively EU directives. This declaration shall cease to be valid if alternations are
made to the equipment without our prior agreement.
This declaration covers:
•order code 50.020 – KS AUDIO CA 4D - in ascending order from serial no. 1001
Relevant EC respectively EU directives:
low voltage directive (LVD) 2006/95/EC furthermore electromagnetic compatibility directive (EMC)
2014/30/EU
Hettenleidelheim 11/14/2016
(Dieter Klein, CEO / KS Beschallungstechnik GmbH)

CA 4D |4 CHANNEL POWER AMP
CA 4D |OPERATING INSTRUCTIONS 18 | P a g e
APPROPIATE USE OF YOUR EQUIPMENT
Al hough KS AUDIO professional produc s represen heavy du y ools
for daily use, please refer o he following informa ion of opera ing
manual under all circums ances.
•Please avoid water condensation at any electronic device under all circumstances !
•Whenever system carried e.g. from cold truck to warm and humid event location, always
allow equipment to acclimate for a while.
•For rail cargo use professional shock-absorbing flight-cases
•To protect your equipment, for regular cargo e.g. by truck, this is not necessary.
•For cleaning your equipment, please follow instructions attached to page 9 of this manual
•Verify the electrical conformity and compatibility of the mains supply.
•Only connect the product to an AC power outlet rated 100-240 V, 50-60 Hz, with the
following current values:
100-120 V: 30 A
200-240 V: 16 A

CA 4D |4 CHANNEL POWER AMP
CA 4D |OPERATING INSTRUCTIONS 19 | P a g e
NOTES
CONTACT
KS BESCHALLUNGSTECHNIK GMBH
WESTENDSTRASSE 1
D - 6 310 HETTENLEIDELHEIM
fon [phone]
fax [phone]
www.ks-audio.de
Model
Serial Number
Purchase Date