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12V

Connect to a fused

+12V constant source 

GND

Connect to a good

 chassis ground

REM IN

Remote turn on input (+)

REM OUT

Remote turn on output (+)

The LPA will provide a 

+12V Remote Output using 

DC Signal Sense from the FL 

and RL channel inputs

SPEAKER SIGNAL INPUTS

Connect to head unit or 

amplifier speaker outputs

Use FL and FR for 2CH mode

RCA SIGNAL OUTPUTS

Connect to amplifier inputs

GROUND ISOLATION

Selectable: GND / ISO / 200Ω

Default: ISO

If ground / engine noise is present, 

the jumper can be repositioned

TURN ON MODE

Selectable: DC / REM

Default: DC

Select DC if using speaker inputs

for turn on, or REM if using REM IN

GAIN

Variable: 

-27.3dB — +3.2dB

Allows gain adjustment of

the output signal 

LPF

Low Pass Filter 

Allows 250Hz low pass

filter for Rear Channels 

INPUT MODE

Selectable: 2CH / 4CH

Set to 2CH if only using FL 

and FR inputs. Set to 4CH 

if using all inputs

BOOST

Variable: 0dB — 12dB

When LPF is ON, provides 

Bass Boost (45Hz) for

Rear Channels 

CLIP

Indicates signal clipping when 

gain is set to high

REMOTE

Optional Remote Level Control 
Knob (LPA-REM) for Rear Channels

LOAD SELECT

Selectable: 20Ω / 60Ω / 20KΩ

Default: 20KΩ

For factory audio systems 

requiring a resistance load to 

output audio, select 60Ω first, 

then 20Ω. All others use 20kΩ

setting

 LPA-E4

 | 4 Channel Line-Output Converter

The L.O.C.PRO ADVANCED™ can be used to add amplifiers to an audio system that does not have RCA outputs or when 
replacing an OEM radio and retaining the factory amplified system. Variable Gain Controls with Clipping Indicators, Selectable 
Ground Isolation and Load Select features ensure a pure, noise-free signal for any type of audio system. 
This Quick Start Guide will get you going, but if you need additional help or information, please visit our website or 

contact Technical Support.

Featur

es & Wiring Information

Quick Start Guide

X

FULLY OPEN TERMINALS

BEFORE INSERTING WIRE

JUMPERS CAN BE 

TRIMMED FLUSH

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