impact LK 705 - User Manual

LK 705
Confirm that all terminal strip connections are secure and tight.
Check both in-line and built-in fuses. Both the "+12V" and the "REMOTE" terminals must
have +12V referenced to chassis ground.
Check the "BALANCE" control on the head unit (or other source) to verify that it is set to
its midpoint.
If you are using the Low Level RCA Inputs, reverse the input plugs at the amplifier
(switches the R with the L). If the channel which is silent switches to other side,
the problem is either in the head unit/other source or the connecting cables.
If the noise is a "whine" whose pitch follows the engine speed, confirm that the
amplifier and any other signal sources ( head unit, etc.) are properly grounded.
If the noise is a "clicking" or "popping" noise whose rate follows the engine speed, this
usually means that the vehicle is equipped wi th resistor spark plugs and wi res, or that
the ignition is in need of service.
Troubleshooting
Before removing your amplifier, refer to the list below and follow the suggested
procedures. Always test the speakers and their wires first.
No Output
Confirm that the audio signal source (car radio, equalizer, etc.) is connected
output signal. To check if the amplifier is supplying signal, unplug the RCA cables from the
signal source (but leave them plugged into the amp). Gently tap the center pin of each of
the disconnected RCA plugs with your finger. This should produce a noise (feedback) in
your speakers.
and is supplying
Only one
channel
works
Confirm that all speaker strip connections are secure and tight.
Weak Output
Readjust the Input Sensitivity Control to better suit the input signal.
Noise in the
Audio
Check the routing of the speaker and input wires to make sure they are not adjacent to
wires which interconnect lights and other accessories.
-12-

Summary

Troubleshooting

No Output

Check connections, fuses, signal source, and speaker wires for proper functionality.

Only One Channel Works

Verify speaker connections, balance control, and input plug orientation for correct channel operation.

Weak Output

Adjust input sensitivity to match the signal source for optimal power output.

Noise in the Audio

Address engine speed-related noise by checking grounds, spark plugs, or wire routing.

Features

Specifications

Protection Circuitry

Explains the amplifier's protection modes, LED indicators, and reset procedures for safety.

Electrical Wiring

Fuses

Details the importance of using correct fuse types and ratings for amplifier and vehicle protection.

Mounting the Amplifier

Provides guidance on selecting a location and securely installing the amplifier in the vehicle.

Input Wiring

Speaker Wiring

Speaker Wiring

Illustrates standard speaker connections for the 5-channel amplifier.

Bridged Speaker Wiring

Shows how to connect speakers in bridged mode for increased power output.

Tri-Mode Speaker Wiring

Explains how to wire speakers for tri-mode operation using passive crossovers.

X-over Setting

System 1: Subwoofer + Front System + Rear System

Details crossover settings for a 5-channel system with subwoofer and front/rear speakers.

System 2: Subwoofer + 2 Way Active Front System

Outlines crossover configuration for a system with subwoofer and active front speakers.

System 3: Subwoofer + Kick Bass + 2 Way Passive Front System

Describes crossover settings for a system with subwoofer, kick bass, and passive front speakers.

System 4: Subwoofer + Powerfull 2 Way Passive Front System

System 5: Subwoofer + Mid Bass + Midrange & Tweeter

Precautions

Mounting feet

Describes the installation of plastic mounting feet on the amplifier chassis.

impact LK 705 Specifications

General

Brand	impact
Model	LK 705
Category	Amplifier
Language	English