- 4 -
- 3 -
2 Ohm Operation
At 2 Ohms, the amplifiers will increase their output power by approximately 50%. The current
draw will also increase by about the same amount, so be sure you have enough current to run
the amplifiers into a 2 Ohm load. If you lack adequate current, your music reproduction will be
distorted.
Please note: The gain control of any car audio amplifier should not be mistaken for a volume
control. It is a sophisticated device, designed to match the output level of your audio source unit
to the input level of the amplifier. Do not adjust this input level to maximum unless your input
level requires it. Ignoring these instructions will result in an input overload to the amplifier, and
excessive audio distortion. It can also cause the protection circuit to engage.
Your amplifier was designed to operate effectively at loads down to 2 Ohms. This means that
you can install four 8 Ohm speakers per channel when using parallel wiring. Increasing the
number of woofers per channel at low frequencies (up to 100Hz) produces an acoustic coupling
effect. This acoustic coupling increases your power output by 3 dB per speaker, or equivalent of
an additional 10W to each speaker.
Electrical Wiring
Fuses
Fuses protect both the amplifier and the electrical system of your vehicle from fault conditions.
If you must replace the fuse in your amplifier, use a fuse of exactly the same type and rating.
A different type or rating of fuse may result in damage or fire.
Mounting the Amplifier
Mark the location for the mounting screw holes by positioning the amplifier where you wish to
install it and use a scribe (or one of the mounting screws) inserted in each mounting hole to
mark the mounting surface. If the mounting surface is carpeted, measure the hole centers and
mark with a felt tip pen.
Drill pilot holes in the mounting surface for the mounting screws and insert the mounting screws
into these holes. Tighten them securely.
Note: Be sure to take note of any wires, lines or other devices in your vehicle which may be
located behind any mounting surface!
Remote Subwoofer Level Control
The monoblock amplifiers (except 2ch /4ch amplifiers)are equipped with a dashboard mount
remote subwoofer level control, run the supplied dashboard remote control from the front panel
of your amplifier. By turning the level knob clockwise, you will increase the output of low
Frequencies.
Your power amplifier is equipped with easy top access screw terminals in order to ensure
excellent electrical contact and to resist corrosion.
When making electrical connections to the amplifier, please observe the following:
:- Use at least 8 gauge or heavier wire for power and ground connections.
:- Wire the amplifier directly to the car battery.
:- For the ground connection, use the shortest possible wire to a good chassis ground point.
:- Wire the Remote connection to the remote turn-on lead of your equalizer or head unit. In some
cases this may be the power antenna lead of the head unit.
High Level Inputs
If the HIGH LEVEL INPUTS are used, do not use the LOW LEVEL INPUTS RCA inputs at the
same time.
HEAD UNIT
From HEAD
UNIT
SPEAKER
OUTPUT
LEFT CHANNEL( +)
LEFT CHANNEL( -)
CHASSIS GROUND
RIGHT CHANNEL (-)
RIGHT CHANNEL (+)
Monoblock Amplifier: LA1110-SL/LA1110-BK
Protection Circuitry
The amplifier protection circuitry will disable the amplifier if input overload, short circuit or extremely high
temperature conditions are detected. When the protection mode is in operation, the LED indicator on the
front panel will be illuminated, indicating the amplifier has gone into a self-preservation mode.
If you observe that the protection LED is lit, please check the system carefully to determine what has
caused the protection circuit to engage. The amplifier can be reset by turning the remote power off
and then on again. If the amplifier shuts down due to a thermal overload condition, please allow it to
cool down before restarting. If the amplifier shut down because of an input overload or short circuit,
be sure to repair these conditions before attempting to power up the amplifier again.
HEAD UNIT
From HEAD
UNIT
SPEAKER
OUTPUT
LEFT CHANNEL( +)
LEFT CHANNEL( -)
CHASSIS GROUND
RIGHT CHANNEL (-)
RIGHT CHANNEL (+)
Monoblock Amplifier: LA1270-SL/LA1270-BK
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