Quick Start Guide

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Quick Start Guide
6. USB Micro Connector – This connects to the USB A port of your
computer in order to use the control software to congure 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 com-
bined 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 inter-
nal 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 amplier has built in diagnostic
codes to tell you exactly what is going wrong should the amplier
detect a problem. Below is a list of diagnostic codes to help you
understand what is going on with your amplier:
If the protection LED should come on, read the red codes quickly
before turning o the system and investigating. Shorts, like
Features continued
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 prob-
lem 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.
6
7
3
1
2
4
5
Thermal Heatsink
Thermal Transformer
Under Voltage
Short
Power Up
(These are the blue LEDs inside the unit)
(This is the red Protection LED on the unit)
Reset Boot
Protection Activated
Repeated Short
Over Voltage
DC Oset
Protection (Red) Codes
Power (Blue) Codes