AudioControl D-4.800 Specifications
Features
• 2/3/4 high power amplier channels
• 4x 125 W @ 4Ω, 4x 200 W @ 2Ω, 2x 400 W @ 4Ω Bridged
• Smart User Interface software included
• Input and Output RTA for precise and informed tuning
• GTO™ Signal Sensing (ch 1-2)
• MILC™ Clip Detection (ch 1-2)
• AccuBASS®
• Signal Summing
• Signal Delay
• 12 and 24 dB/octave crossovers
• 30 band equalizer
• Optional ACR-3 remote for preset recall and level control
• Solid and Rugged Chassis
• Pine Scented DSP
High Power Multi Channel Amplier
with DSP Matrix Processor
Quick Start Guide
Important Safety Instructions
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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 a dry cloth.
7. Do not block any ventilation openings. Install in accordance with the
manufacturer’s instructions.
8. Do not install near any heat sources such as muers, silencers, exhaust
pipes, or other apparatus (including ampliers) that produce heat.
9. WARNING: Improper installation may lead to permanent injury or death.
Installation of the apparatus must be done with great care by qualied
personnel, to prevent damage to fuel lines, power, and other electrical
wiring, hydraulic brake lines, and other systems, that might compromise
vehicle safety.
10. Provide +12V and Ground insulated wiring of between 8 and 3 AWG to
ensure adequate current to the amplier.
11. Use rubber grommets to protect wiring whenever passing wires through
metal openings or bulkheads.
12. Only use attachments/accessories specied by the manufacturer.
13. Refer all servicing to qualied service personnel. Servicing is required
when the apparatus has been damaged in any way, such as the power input terminals are 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.
14. This apparatus shall not be exposed to dripping or splashing, and no
object lled with liquids, shall be placed on the apparatus.
15. Fuses shall be replaced only with the correct type and fuse value, and
only when the apparatus is powered o.
16. Exposure to high sound pressure levels may lead to permanent hearing
loss. Take every precaution to protect your hearing.
The lightning ash with arrowhead symbol within an equilateral
triangle is intended to alert the user to the presence of uninsulated
“dangerous voltage” within the product’s enclosure, that may be of
sucient magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to
alert the user of the presence of important operating and maintenance (servicing) instructions in the literature accompanying the
appliance.
Caution: to reduce the risk of electric shock, do
not disassemble the apparatus, other than to
remove the top panel to access the controls.
There are no user-serviceable parts inside. Refer
servicing to qualied personnel.
Recycling notice: If the time comes and this apparatus has fullled
its destiny, do not throw it out into the trash. It has to be carefully
recycled for the good of mankind, by a facility specially equipped
for the safe recycling of electronic apparatii. Please contact your
local or state recycling leaders for assistance in locating a suitable
nearby recycling facility. Or, contact us and we might be able to
repair it for you.
Quick Start Guide
Features
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1. Fuses 40A – Replace these fuses only with the exact same style
and Ampere rating. Disconnect 12V power before changing or
inspecting the fuses.
2. Power Input Terminal +12V – The left screw terminal connects
to the +12V battery binding post of the vehicle. Use good quality
insulated wire, between 8 and 3 gauge.
Power Input Terminal Ground – The right screw terminal con-
nects to a good ground connection on the vehicle. Use good quality insulated wire, between 8 and 3 gauge.
Remote Power Input Terminal – The middle screw terminal
connects to the 12V remote trigger output of some head units.
When the head unit is turned on, then the D-4.800 will turn on.
Alternatively, you can use the GTO™ feature of the D-4.800 so it
will turn on when an audio signal is detected at the speaker-level
or line-level inputs of channels 1-2 (front).
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3. RCA Analog Line-Level Inputs – The line-level output from the
head unit or factory-installed radios can connect here, so the
D-4.800 will receive the line-level audio signals.
4. RCA Analog Line-Level Outputs – These line-level analog
outputs from the D-4.800 connect to the line-level inputs of your
power ampliers and other equipment. The matrix capabilities of
the D-4.800 allow you to pick and choose the outputs from any
combination of inputs, add crossovers and EQ as required.
5. Speaker-Level Inputs – The speaker-level output from ampliers
and factory installed radios can connect here, so the D-4.800 will
receive the audio signals this way and do its thing. Make sure that
you follow the plus and minus polarity markings on the D-4.800
and match it to the polarity of the speaker wiring. Speaker-level
Inputs 1-2 have the GTO™ (great turn on) signal-sense circuit that
will awaken the D-4.800 when an input signal is present.
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Features continued
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6. USB Micro Connector – This connects to the USB A port of your
computer in order to use the control software to congure the
D-4.800.
7. Remote Control Connector – This connects to the optional
ACR-3 remote level control using a standard telephone cord and
connectors.
8. Speaker-Level Output Terminals – These screw terminals
connect with speaker wire to your loudspeakers. Make sure that
the average combined speaker impedance does not dip below 2
Ohms, or 4 Ohms in Bridged mode. Outputs 1 and 2 can be combined in Bridge mode to power a single speaker. Use the 1+ and
2- terminals only. Outputs 3 and 4 can also be combined in bridge
mode, use the 3+ and 4- terminals only.
9. Power LED – If you have connected your battery power, vehicle
ground, and turn-on lead (or GTO™ signal sensing) correctly, then
this light should be GREEN to indicate the power is ON. An internal blue glow will also emanate from the heatsink area to indicate
that the power is ON. There are times when this blue glow will
ash, such as during power-up, and when the protection circuits
have detected a problem. See the table below.
10. Protection LED – The D-4.800 amplier has built in diagnostic
codes to tell you exactly what is going wrong should the amplier
detect a problem. Below is a list of diagnostic codes to help you
understand what is going on with your amplier:
If the protection LED should come on, read the red codes quickly
before turning o the system and investigating. Shorts, like
crushed-velvet hot pants, are not a good thing. Note that the blue
power codes mentioned in the table are for the internal blue glow
from behind the heatsink area, and not the power LED which is
green. You might not notice the subtle blue glow at rst, unless
you are in the dark or the shade. If there seems to be a problem with the unit, the sensing circuit will shut down the unit to
protect itself, and this protection LED will come on. For example,
this might happen if the temperature within the unit is too high.
Check there is good ventilation around the unit, and that the
speaker wires are not short circuiting, and check that you are not
running too low of a speaker impedance.
Power (Blue) Codes
Power Up
Reset Boot
Protection Activated
Protection (Red) Codes
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Short
2
Repeated Short
3
Under Voltage
4
Over Voltage
5
DC Oset
6
Thermal Heatsink
7
Thermal Transformer
(These are the blue LEDs inside the unit)
(This is the red Protection LED on the unit)
Quick Start Guide
Features continued
11. Communications LED – This LED turns on when there is USB
activity between the D-4.800 and your computer during set up.
12. GTO™ Signal Sense – In the ON position, the D-4.800 amplier
will turn on gracefully when it detects an incoming audio signal
on inputs 1 and 2, and it will turn o after a period of time when
the audio signal fades away to silence. In some situations, factory
installed audio systems may turn on or “wake up” due to convenience features like door chimes, alarms, and cell phone signals
that trigger the source unit in the vehicle to come on. To prevent
these from turning your audio system on unexpectedly, you can
bypass the GTO™ circuit by moving the GTO™ switch to the OFF
position and use a switched 12-volt signal connected to the Remote In terminal instead.
13. Maximized Input LEDs – These LEDs illuminate when a maximum audio signal is present on any of the analog audio inputs.
During power-up, these LEDs and the output LEDs will turn on
momentarily, one after the other. Turn down the levels if these
LEDs are on a lot.
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14. Maximized Output LEDs – These LEDs illuminate when there is
maximum signal present on any of the analog audio outputs. Turn
down the output levels if these LEDs are on a lot.
15. MILC™ Source Clip LED – The MILC™ (Maximum Input Level
Control) patent-pending level-setting circuit (on inputs 1-2 only)
prevents clipping and damaging distortion. It calculates when the
waveform of an incoming audio signal is clipping, and if it is, this
LED will fulll its destiny and shine forth.
With this advanced feature, you are able to optimize the level of
the incoming audio signal until the Source Clip LED is just about
to come on. If the LED comes on during normal operation, you
should adjust the level of the audio signals before they reach the
D-4.800.
After an interview with the lead engineer included the words
“dierential calculus,” and some hieroglyphics on a chalk board,
the technical writer’s eyes glazed over and he had to be brought
round with a nice cup of tea and two donuts with sprinkles.
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