AUDIO SYSTEM CARBON-250.4 High-Performance Car Amplifier Owner’s Manual

AUDIO SYSTEM CARBON-250.4 High-Performance Car Amplifier

Product Information

The Carbon series by audio system is a high-performance car amplifier designed and engineered by audio system Germany. It includes two models: Carbon-500.1D and Carbon-250.4. The amplifiers feature DC protection, wired remote control (RTC), high-power input, and compatibility with Audio System RTC.

Carbon-500.1D

• DC protection
• Wired Remote Control (RTC)
• High-Power Input (normally original radio) with automatically “Turn-On”

Carbon-250.4

• 4-Channel High Power Class-AB amplifier
• MOS-FET PWM Power Supply
• Stable into 2 Ohm stereo per channel and 4 ohm bridged mode
• Variable switchable Low Pass Filter from 50 to 4000 Hz or variable High Pass Filter from 50 to 4000 Hz
• Compatible with Audio System RTC
• 2-channel pre-out
• Input Sensitivity: variable 200 mV maximum to 6 V minimum
• Multi-Way Protection Circuitry: overheating, overcurrent, short circuitry, and speaker DC protection
• Operating Voltage: DC 10 ~ 16 V
• High-Power Input (normally original radio) with automatically “Turn-On”

Product Usage Instructions

Power Connection

CArbon series by audio system (Carbon-500.1D /Carbon-250.4)

1. Disconnect the power supply of the vehicle by removing the ground cable of the battery.
2. Connect the GND (ground) connection of the amplifier with the car chassis, keeping the cable as short as possible (not longer than 50 cm).
3. Ensure the connection with the vehicle chassis is free of paint, dirt, and dust.

ATTENTION:

• Follow the instructions during the installation of your amplifier.
• Ensure professional attachment and avoid damaging electrical cables, gas tanks, hydraulic brakes, or other components.
• Provide sufficient cooling and air circulation by avoiding installation in small closed boxes or close to heating parts.
• Protect the amplifier from fluids, wetness, heat, foreign material, and other influences.
• The amplifier is only suitable for vehicles with a 12V DC power supply.
• Never install the power supply cable with other original wires of the vehicle (e.g., gas cables, fan motors, brand control modules).
• Install the signal cable (cinch cable) and speaker cable far away from the power cables to avoid signal troubles.
• Ensure proper installation of the amplifier cables to prevent binding, squeezing, or breaking.

RCA Connection

Carbon-500.1D
Connect to the input of additional amplifiers.

Carbon-250.4
Connect to the input of additional amplifiers using a Wired Remote Control RTC (optional).

Speaker Connection

Carbon-500.1D

For Mono Betrieb, use speakers with an impedance of 2 ~ 8 Ohm.

For Dual Mono Betrieb, use speakers with an impedance of 4 ~ 8 Ohm.

Note: When using 2 subwoofers or a double voice coil subwoofer in parallel configuration, ensure that each subwoofer/voice coil resistance is not below 4 Ohm, so the resulting total resistance is not below 2 Ohm.

Features

Congratulation on your purchase of your new carbon-Series amplifier.

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.

Carbon-500.1d

• 1-Channel High Power Class-D amplifier with SMD technology
• MOS-FET PWM Power Supply, Operating Voltage : DC 10 ~ 16 V
•  Stable into 2 Ohm mono
• Variable Low Pass Filter from 30 to 150 Hz
• Variable Subsonic High Pass Filter from 10 to 50 Hz
• Variable Bass Boost from 0 to 12 dB @ 45 Hz
• Phase control from 0° to 180°
• Input Sensitivity: variable 200 mV maximum to 6 V minimum
• Multi-Way Protection Circuitry: overheating, overcurrent, short circuitry and speaker DC protection
• Wired Remote Control RTC
• High-Power-Input (normally originial radio) with automatically „Turn-On“

carbon-250. 4

• 4-Channel High Power Class-AB amplifier
• MOS-FET PWM Power Supply
• Stable into 2 Ohm stereo per channel and 4 ohm bridged mode
• Variable switchable Low Pass Filter from 50 to 4000 Hz or variable High Pass Filter from 50 to 4000 Hz
• compatible to Audio System RTC
• 2-channel pre-out
• Input Sensitivity: variable 200 mV maximum to 6 V minimum
• Multi-Way Protection Circuitry: overheating, overcurrent, short circuitry and speaker DC protection
•  Operating Voltage: DC 10 ~ 16 V
• High-Power-Input (normally originial radio) with automatically „Turn-On“

Power Connection

carbon-500.1D / carbon-250. 4

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 8 – 6). Make sure, that the connection with the vehicle chassis is free of paint, dirt and dust.

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 fuse holder 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 8 – 6). This fuse protects the amplifier and the vehicle against the possibility of a short circuit in the power cable.

4. Remote connection
   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 mm² power cable.

ATTENTION

Please follow the instructions during the installation of your amplifier:

• Take care of a professional attachement. Pay attention, that no electrical cable, gas tank, hydraulic breakes or other components get damaged.
• There has to be enough cooling and air circulation. Avoid the installation in small closed boxes or close to heatening parts.
• Protect the amplifier from fluids, wetness, heat and foreign material as well as from other influences.
• The amplifier is only to be built into vehicles with a 12 V DC power supply.
• Never install the power supply cable with other original wires of the vehicle (gas cables), fan motors, brand control moduls etc.
• Install the signal cable (cinch cable) as well as the speaker cable far away from the power cables to avoid troubles with the music signal.
• The cables of your amplifier have to be installed, so that there is no danger of binding, squeezing or breaking.

RCA connection

carbon-500.1D

Carbon-250. 4

The carbon-Series amplifier offers RCA-Inputs, which are connected through cinch cables with the preamplifier-outputs of the head unit. If the head unit (OEM-RADIO) has no RCA-Output, then it is possible to connect the speaker output direct to High-Input of the amplifier.
Important: the Gain-Controller has to be adjusted to minimum, then carfully turn up the volume. If signal is presented, the amplifier automatically turns on.
With the aid of the variable high- and lowpassfilter, phase shift-controller, the gain-controller and subsonicfilter you are able to adjust the amplifier on to your prefered taste of hearing, the circumstances of the vehicle and to the speakers.
The wired remote controller RTC can be installed to adjust the output level. With CARBON-250. 4 the RTC adjusts the level of channel 3 and 4 only when lowpass filter is selected.
In this regard, AUDIO SYSTEM germany recommends to adjust your amplifier through a specialized service center, dealer or a specialist.

Speaker Connection

Carbon-500.1d

Mono Betrieb

Dual Mono Betrieb

Please take care the CARBON-500.1 d is a pure 1 channel amplifier. If using 2 subwoofers or a double voice coil subwoofer in parallel configuration take care each subwoofer/voicecoil resistance must not be below 4 Ohm so the resulting total resistance is not below 2 Ohm.

Carbon-250. 4

2-Channel Mono

4-Channel Stereo

3-Channel Stereo + Mono

Trouble Shooting

This power amplifier is featured with an efficient protection system to prevent any damages like over-heating, overvoltage, short-circuit and DC at the loudspeaker output.
Occuring an error the protection-LED will light in red. In order to check the problem, first turn down all levels of the head unit, afterwards turn it off.

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.

---|---
PROTECTION LED| – cinch cable alright and professional connected
ILLUMINATES GREEN| – loudspeaker professional connected?
WHILE AMPLIFIER IS| – head unit alright?
SOUNDLESS|
PROTECTION LED ILLUMINATES RED WHEN AMPLIFIER IS POWERED UP| – amplifier too hot?

– short-circuit at the loudspeaker output?

– short-circuit caused by loudspeaker cable with vehicle chassis (ground)?

– input voltage too high (e.g.faulty generator)?

OVERHEATING| – impedance alright?

– loudspeaker error?

– adequate airflow of the amplifier?

! CAUTION !

After cooling down, the amplifier turns on automatically.

(PROTECTION LED
ILLUMINATES RED WHEN
AMPLIFIER IS POWERED UP)
ERROR IN AMPLIFIER FUSE| – ground  professional connected?

– loudspeaker  impedance alright?

! CAUTION !

Make sure when changing fuses to use the same value.

SOUND TOO LOW OR LOW-DISTORTED SOUND| – 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…)

HIGH HISS-ENGINE NOISE IN SPEAKERS| – ground connection professional connected?

– short-circuit caused by loudspeaker cable with vehicle chassis (ground)?

– cinchcable (RCA) and/or loudspeaker cable installed too close to the power connection cable?

– cinch ground (RCA) of the head unit alright?

ATTENTION

Please contact your specialized 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!

Specifications

carbon-500.1d

• Power Supply Voltage  10 – 16 V
• Rated Power Output at 14,4 V
  • RMS power @ 4 ohm mono 1x 350 W
  • RMS power @ 2 ohm mono 1x 500 W
• Bass Boost  0 – 12 dB @ 45 Hz
• Signal to Noise Ratio 96 dB
• Low Pass Crossover 30 ~ 150 Hz
• High Pass Crossover / Subsonic filter 10 ~ 50 Hz
• Frequency Response 10 Hz ~ 150 Hz (+/-1 dB)
• THD@RMS Watts < 0,048%
• Channel Separation 75 dB
• Fuse Rating  30 A x 2
• Input Sensitivity 200 mV ~ 6 V (+/- 5%)
• Dimensions 176(W) x 51(H) x 200(L) mm

Carbon-250. 4

• Power Supply Voltage  10 – 16 V
• Rated Power Output at 14,4 V / 28,8 V
  • RMS power @ 4 Ohm stereo 4x 62.5 W
  • RMS power @ 2 Ohm stereo 4x 105 W
  • RMS power @ 4 Ohm bridged 2x 210 W
• Signal to Noise Ratio 97 dB
• Low Pass Crossover 50 ~ 4000 Hz
• High Pass Crossover 50 ~ 4000 Hz
• Frequency Response 10 Hz ~ 45 KHz (+/-1 dB)
• THD@RMS Watts < 0,049%
• Channel Separation 75 dB
• Fuse Rating 20 A x 2
• Input Sensitivity 200 mV ~ 6 V (+/- 5%)
• Dimensions 176(W) x 51(H) x 280(L) mm

Audio System Germany
Falltorstraße 6 – 76707 Hambrücken
designed and engineered by audio system Germany

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