Features and controls – Legacy Car Audio LA-1878 User Manual

Page 4

Adjustable from 20Hz to 250Hz with a slope of 24dB per

octave.This allows for the adjustment of the upper point

of the frequency bandwidth and the respective subwoofer.

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Features and Controls

Power LED Indicator

This LED is illuminated when the REMOTE ON

system is turned on.

Crossover Low Pass Filter

Adjustable from 15Hz to 40Hz with a slope of 24dB per

octave.This allows for the attenuation of frequencies that

are mostly inaudible and cause unnecessary strain on the

amplifier.

High Pass Subsonic Filter

Phase Shift Switch

Input Level Control

Use this control to match the output of the head unit

to the amplifier. If distortion is present, reduce the

setting of this control.

Power Supply Terminals

Protects the amplifier as well as the automobile electrical

system from short circuit conditions.

Fuse

These terminals are 14K Gold plated for high conductivity

and minimum impedance loss. The terminals face

upwards for easy wiring in tight situations.

Speaker Terminals

This unit is provided with gold-plated RCA input

jacks. Using RCA-RCA type patch cords, connect

these inputs to the RCA outputs from your head

unit.

Low Level Input (High Impedance)

This unit is provided with gold-plated RCA Output jacks.

Using RCA-RCA type patch cords, connect these Outputs

to the RCA Inputs for your anyther amplifier.

Low Level Output (High Impedance)

Protection LED Indicator

The protection circuitry in the amp will disable it if it

senses an input overload, speaker short circuit, or

thermal overload conditions. Should this occur, the

PROTECT LED will be illuminated. At that time, it is

important that you check to determine what has caused

the protection circuitry to become activated.

If the amp shut off because of a thermal overload,

allow it to cool down before attempting to restart.

If the shutdown occured because of an input overload,

or speaker short circuit, be sure to correct these

conditions before attempting to restart the amp.

To reset the amp, turn the REMOTE power off and on

again.

Allows you to change the phase of your subwoofer

from 0 degree to 180 degrees to help compensate from

timing difference between drivers.

12 Protection LED Indicator

The protection circuitry in the amp will disable it if it

senses an input overload, speaker short circuit, or

thermal overload conditions. Should this occur, the

PROTECT LED will be illuminated. At that time, it is

important that you check to determine what has caused

the protection circuitry to become activated.

If the amp shut off because of a thermal overload,

allow it to cool down before attempting to restart.

If the shutdown occured because of an input overload,

or speaker short circuit, be sure to correct these

conditions before attempting to restart the amp.

To reset the amp, turn the REMOTE power off and on

again.

Power LED Indicator

This LED is illuminated when the REMOTE ON

system is turned on.

This unit is provided with gold-plated RCA input

jacks. Using RCA-RCA type patch cords, connect

these inputs to the RCA outputs from your head

unit.

Low Level Input (High Impedance)

High Level Input (Low Impedance)

Use these if your car stereo does not have

RCA output jacks: connect the speaker output from

the head unit to these inputs

Permits you to adjust the crossover frequency from

80 Hz to 2.5 kHz to suit the tweeters

High Pass Control

Permits you to adjust the crossover frequency from 35

Hz to 400 Hz to suit the subwoofers

Low Pass Control

Allows you to increase the bass signal level sent to the

speakers

Bass Boost Control

In a full range system, set this to FULL. If the amp is

being used to power a crossover system, set to either

HPF or LPF as needed.

Crossover Mode Switch