USB 3000
Class-D Power amplifier 3000 Watt
POWER SUPPLY CONNECTIONS
The USB 3000 is designed to work within 10 to 16 volts DC. Before any wires are connected, the vehi-
cle's electrical system should be checked for correct voltage supply with the help of a voltmeter. First
check the voltage at the battery terminals with the ignition in the off position. The voltmeter should
read no less than 12 volts. Next, check the battery with the engine running between 1500 and 2000
rpm. The voltmeter should now read between 13.5 and 14.5 volts. If your vehicle's electrical supply
is not up to these specifications, we recommend having it checked by an automotive mechanic befo-
re you continue the installation.
RECOMMENDED POWER WIRE
The proper wire size is very important for an amplifier of this power level. Because the USB 3000 is
capable of drawing in excess of 90 amperes, we recommend 4 Gauge wire for lengths up to twen-ty
feet. If a longer length is needed, a larger gauge wire may be necessary.
POWER
All amplifiers power wire should be wired directly to the battery using the wire requirements listed
above. Start at the amplifier and run the power wire through the vehicle to the battery. We recom-
mend the use of grommets when passing the power wire through any metal surface. Avoid sharp cor-
ners or sharp body parts that may easily cut through the insulation on the wire. Avoid running the
power wire over engine components and near heater cores. Use an inline fuse to eliminate the risk of
a fire caused by a short in your power wire. Connect the fuse holder as close to the battery positive
as possible. For most applications, an 80 ampere Maxi fuse or comparible ANL wafer fuse can be used.
Now con-nect the wire to the battery, but remember to leave the fuse out until all other wires are
connected. -
GROUND
When grounding your amplifier, locate a metal area close to the amplifier that is a good Source of
ground ( preferable the floor). Once again, investigate the area you wish to use for electrical wires,
vacuum lines, and brake or fuel lines. Using either a wire brush or sandpaper, eliminate unwanted
paint to supply a bet-ter contact for your ground. Use the same Gauge wire for gro-und as you did
for the power. Terminate the ground wire using the correct size ring terminal and attach it to the bare
metal using a nut and bolt. It is important for this connection to be solid. To complete the job, spre-
ad silicon over the screw and bare metal to prevent rust and possible water leaks.
REMOTE TURN-ON
In between the power and ground is a re-note turn-on terminal. This terminal must be connected to
a sw 12volt source. Typically, remote turn-on leads are provided at the source unit that will
turn on and off the amplifier in correspondence with the source. If a radio does not have a remote
turn-on, then a power antenna wire may be used. Yet, if neither of these leads are available at the
source, a sw 12 volt supply must be supplied. Run a minimum of 1 8-gauge wire from the
amplifier location to the source of the sw 12 volt lead. If possible, route this wire on the same
side of the vehicle as your power wire. Connect the source remote output to the wire, Back at the
amp-lifier, loosen the setscrew for the terminal marked REM on the amplifier using a 3mm Allen key.
Cut the remote wire to length. Strip approximately 1/2 inch of insulation from the end of the wire and
insert into the terminal. Tighten the screw securely.
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