Audiosystem C Series User manual

trouble shooting
-4-
This power amplifier is featured with a efficient protection system to prevent any
damages like overheating, overvoltage and short-circuit.
In order to check the problem, first turn down all levels of the head unit, afterwards turn
it off.
NO SOUND
OVERHEATING
ERROR IN AMPLIFIER
FUSE
SOUND TOO LOW OR
LOW-DISTORTED SOUND
HIGH HISS-ENGINE NOISE
IN SPEAKERS
- ground connection professional connected?
- short-circuit caused by loudspeaker cable with vehicle
chassi (ground)?
- cinchcable (RCA) and/or loudspeaker cabel installed
too close to the power connection cable?
- cinch ground (RCA) of the head unit alright?
- impedance alright?
- loudspeaker error?
- adequate airflow of the amplifier?
! CAUTION !
After cooling down, the amplifier turns on automatically.
- ground professional connected?
- loudspeaker impedance alright?
! CAUTION !
Make sure when changing fuses to use the same value.
- input level control “GAIN” is set to match the head unit?
- output level control of the head unit alright?
- loudspeaker error?
- loudspeaker cable checked?
- crossover frequencies has been properly set?
(Check head unit, amplilfier, DSP, soundprozessor,
equalizer, frequency bandpassfilter...)
AMPLIFIER IS NOT
POWERED UP, NO LED
IS LIGHTENING
- ground connection professional connected?
- +12V powercable professional connected?
- remote cable professional connected?
- fuses inserted and alright?
- analyze voltage on the amplifier.
- signal is presented?
- cinch cable alright and professional connected?
- loudspeaker professional connected?
- head unit alright?
- signal is presented?
CAUTION
Please contact your specialist dealer if the amplifier is still not working after it has been
checked with the error list!
For warranty adjustement / repairs the original invoice has to be attached!
Opening the power amplifier is leading to a lost of warranty in either case!

-1-
- 4-Channel-Mini-Amplifier
- Stable into 2 Ohm Stereo per channel
- Extreme high input sensitivity from 0,1 to 13 V
- Multi-Way Protection Circuitry: overheat, over load and short circuitry protection
- Full-Active-Mode possible
- High-Level-Input (normally originial radio) with automatically „Turn-On“
- AUX-Input or RCA-Input
Power Supply Voltage
Rated Power Output at 14,4 V
- RMS power @ 4 ohm stereo
- RMS power @ 2 ohm stereo
Signal to Noise Ratio
Low Pass Filter (LPF) Channel 1+2
High Pass Filter (HPF) Channel 3+4
Frequency Response
THD@RMS Watts at 4 Ohm and 1/2 rated power
Channel Separation
Fuse Rating
Input Sensitivity
Dimensions
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features
specifications
manual
IMPORTANT: Before installation your power amplifier, we recommend to read the
owner´s manual carefully and to follow the instructions regarding connection and
fitting exactly.
ATTENTION: Pay attention to advices and instructions of the car manufacturer.
Important: Your proof of purchase is evidence of warranty claim for repair or
replacement. Keep your proof of purchase, manual and original packaging.
ATTENTION: Use of sound components can impair your ability to hear necessary
traffic sounds and may constitute a hazard while driving your automobile.
Audio SystemGermany accepts no liability for hearing loss, bodily injury
or property damage as a result of use or misuse of our products.
We recommend installing the equipment by an authorized service center or dealer. A
professional fitting and connection is the requirement for further warranty and
perfect sound.
Congratulation on your purchase of your new C-Series amlifier.
CO-35. 4
designed and engineered by audio system Germany
the sound
R
since 1988
10 - 16 V
4x 35 W
4x 50 W
> 88 dB
80 oder 1500 Hz
80 bis 4000 Hz
35 Hz ~ 20 KHz (+/-1 dB)
< 0,03%
65 dB
1x 15A
100 mV ~ 13 V (+/- 5%)
132(L) x 45(H) x 80(W) mm

power connection
-2-
3. +12 V Power connection: Connect the +12 V contact of the amplifier with the supply cable
via a fuse directly to the vehicle battery. Keep in mind, that the length of the cable from
fuseholder to vehicle battery has to be a maximum of 30 cm. Requirement for a perfect
function of the amplifier is a qualitative high end fuse holder as well as a suitable cable cross
section (AWG sice 6 - 10). This fuse protects the amplifier and the vehicle against the
possibility of a short circuit in the power cable.
4. Remote connection (optional): You can optional connect the REM-terminal of the amplifier
to the remote-output (automatic 12 V antenna-output) of the head unit. Therefore use a 0,5 -
1,5 mm power cable.
5. High Level Input: If the radio (normally original radio) has no RCA output and remote
output (automatic 12 V antenna output) it is possible to connect the speaker output from
headunit direct in „High Level Input“. If the amplifier get a signal from head unit output, the
amplifier will turn on.
1. Battery disconnection
First disconnect the power supply of
the vehicle. This works out the best
by removing the ground cable of the
battery.
2. Ground connection
Connect the GND (ground)
connection of the amplifier with the
car chassis. Keep this cable as
short as possible (not longer than
50 cm) and use a suitable cross
section (AWG sice 6 - 10).
Make sure, that the connection with
the vehicle chassis is free of paint,
dirt and dust.
a) Take extra care when making the connections. Make sure that no electrical cable, gas
tank, hydraulic brakes or other components get damaged.
b) Allow enough cooling and air circulation and avoid installing the unit in small closed
boxes or close to parts that heat up easily.
c) Keep the amplifier away from liquid, moisture, heat and foreign materials.
d) This amplifier can only be used in vehicles with 12V DC power supply.
e) Never install the power supply cable with other original vehicle wires (gas cables), fan
motors, control modules etc.
f) Install the signal cable (cinch cable) as well as speaker cable far away from the power
cables to avoid interference with music signals.
g) To avoid dangers of cables binding, squeezing or breaking, use the cables supplied
with your amplifier.
Please take the following precautions when installing your amplifier:
Caution
GROUND Remote Turn-on
(optional)
fuse
max.30 cm
BATTERY HEAD UNIT
black
yellow
orange

-3-
RCA/speaker connection
The CO-35. 4 offers RCA and AUX-Inputs, which are connected through cinch cables with
the preamplifier-outputs of the head unit (head unit, MP3-Player, iPhone, iPad). If the head
unit (OEM-RADIO) has no RCA-Output, than it is possible to connect the speaker output to
direct RCA-Input and switch has to be turned to „HI“. If signal is presented at RCA, AUX or
High Input, the amplifier automatically turns on and the power LED lights. With the aid of the
gain-controller and variable crossover you are able to adjust the amplifier on to your
prefered taste of hearing, the circumstances of the vehicle and to the speakers.
In this regard, AUDIO SYSTEM germany recommends to adjust your amplifier
through a specialized service center, dealer or a specialist.
HEAD UNIT
Full-Range Stereo
Subwoofer + Front System
Full-Active-Mode
Speaker Impedance 2 ~ 4 Ohm
Speaker Impedance 2 ~ 4 Ohm
Speaker Impedance 2 ~ 4 Ohm
10 Ω +22uF
ON = 12dB
OFF = 6dB
PTC
6,8 Ω3,3 Ω10 Ω +22uF
ON = 12dB
OFF = 6dB
PTC
6,8 Ω3,3 Ω