3
INSTALLATION
Amplifier Mounting:
Ventilation:
Amplifier and Crossover Input:
Choose an appropriate location to mount the amplifier(s). Make sure your choice is free
from excess heat, moisture, and vibration. Under the vehicle seat or in the trunk are common
mounting locations. Be sure the amplifier receives adequate ventilation to it’s heat sink and is
positioned away from flying luggage and people’s feet. Do not mount the amplifier directly to
speaker enclosures.
It is important to provide the amplifier with adequate ventilation to remove heat from the
amplifier heat sink. During high performance applications, in which the amplifier may be exposed
to low impedance loads, it may be necessary to provide external ventilation via a fan or some other
means. With proper ventilation, the “run time” of the amplifier between thermal protection cycles
can be greatly extended.
U.S. Amps feature a unique isolated input section that will accept signal voltages from 250
mv to 10 volts. The input section also provides amplifier ground isolation for the prevention of system
and engine noise. The unique configuration of the U.S. Amps input necessitates a correct input
ground, and is not compatible with external ground-isolation devices.
INSTALLATION
Amplifier Mounting:
Ventilation:
Amplifier and Crossover Input:
Signal Level (BTL) Input:
Gain Control Adjustment:
This product will accept line and signal level, and can be used with most BTL “high powered”
sources. To use a BTL source, observe the following:
BTL outputs have two “hot” non-grounded leads per channel. Select ONE per channel,
and connect it to the “center conductor” of the RCA input cables going to the amplifier input.
Insulate and disregard the second wire of each BTL output pair.
Ground the shield wires of the RCA cable to the metal body of the source unit.
1)
2)
3)
Always start with the gain control fully counter-clockwise (all the way down), or just slightly
open. Adjust the source unit volume as high as possible without distortion. Increase the amplifier
gain until the amplifier distorts, then turn the gain down slightly until the signal becomes clear. It is
desirable to operate the amp at the lowest possible gain setting to help reject spurious system noise.
Signal Level (BTL) Input:
Gain Control Adjustment:
1)
2)
3)
The input of a U.S. Amp MUST be grounded for proper amplifier operation.
The use of external ground isolation dividing devices is unnecessary
and may cause severe amplifier and / or system damage.
The input of a U.S. Amp MUST be grounded for proper amplifier operation.
The use of external ground isolation dividing devices is unnecessary
and may cause severe amplifier and / or system damage.
IMPORTANT NOTICE
IMPORTANT NOTICE
