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9

Specifications

Specifications subject to change without notice.

Audio Section

Max Power Output (2 

)..................................................................................................400 W 

×

1

Rated Power Output 

(4 

) ......................................................................................200 W 

×

1 (DIN45324, +B=14.4V)

(2 

) ..........................................................................................300 W 

×

1 (100 Hz, 0.8 % THD)

Frequency Response (+0, –1 dB) ............................................................................5 Hz ~ 200 Hz
Total Harmonic Distortion (Rated power)

#

..............................................................0.01 % (100 Hz)

Sensitivity (rated output) (MAX) ..............................................................................................0.2 V

Sensitivity (rated output)

(MIN) ..............................................................................................5.0 V

Signal to Noise Ratio............................................................................................................100 dB
Input Impedance ....................................................................................................................10 k

Damping Factor..............................................................................More than 9900 (at 

connect)

Low Pass Filter Frequency (24 dB/oct.)........................................................50 ~ 200 Hz (variable)
Infrasonic Filter Frequency (24 dB/oct.) ..........................................................................15 / 25 Hz

# Sensitivity = Mini. , Through LPF (30 kHz)

General

Operating Voltage ................................................................................14.4 V (11 ~ 16 V allowable)
Current Consumption (4 

, 14.4 V, 10% THD) ........................................................................28 A

Dimensions (W 

×

×

D)......................................................................................290 

×

56 

×

230 mm

Weight ..................................................................................................................................3.7 kg

Troubleshooting Guide

What might appear to be a malfunction in your unit may just be the result of slight
misoperation or miswiring. Before calling service, first check the following table for possible
problems.

PROBLEM

POSSIBLE CAUSE

SOLUTION

No sound.
(No sound from one side.)

The output level is too
small (or too large).

The sound quality is bad.
(The sound is distorted.)

• Input (or output) cables are

disconnected.

• The connection of the sigma

servo terminals is wrong.

• Protection circuit may be

activated.

• The fuse may be blown

because the volume was too
high.

The input sensitivity adjusting
control is not set to the correct
position.

• The speakers cable are

connected with wrong 

+

-

polarity.

• A speaker cable is pinched by a

screw in the car body.

• The switches may be set

improperly.

• Connect the input (or output)

cables.

• Check the connection referring

to "Sigma servo feed back".

• Check connections by referring

to "Power indicator".

• Replace the fuse with a new

fuse and use a lower volume.

Adjust the control correctly
referring to "Controls".

• Connect them properly checking

the 

+

-

of the terminals and

cables well.

• Connect the speaker cable again

so that it is not pinched by
anything.

• Set switches properly by

referring to "Controls".

Summary of Contents for KAC-818

Page 1: ...KAC 818 B64 1355 00 EM MONO POWER AMPLIFIER INSTRUCTION MANUAL ...

Page 2: ... exposed to direct sunlight or excessive heat or humidity Also avoid places with too much dust or the possibility of water splashing When replacing a fuse only use a new one with the prescribed rating Using a fuse with the wrong rating may cause your unit to malfunction To prevent a short circuit when replacing a fuse first disconnect the wiring harness If you experience problems during installati...

Page 3: ...t such as the brake lamps turn signal lamps and windshield wipers operate normally 2CAUTION Installation board etc thickness 15 mm or more Self tapping screw ø4 16 mm 1 Remove the ignition key and disconnect the negative terminal of the battery to prevent short circuits 2 Set the unit according to the intended usage 3 Connect the input and output cables of the units 4 Connect the center unit and t...

Page 4: ... 6 SIGMA SERVO FEED BACK terminals See p 8 Be sure to make proper connections to the SIGMA SERVO FEED BACK terminals Incorrect connection may result in lack of sound output or other malfunctions 7 INFRASONIC FILTER switch Ultralow frequencies that cannot be reproduced even by a subwoofer speaker do not become sound but become unnecessary oscillations which affect the sound by causing distortion et...

Page 5: ... the protection function is triggered the Power indicator goes off and the amplifier stops operating A speaker cable may be short circuited A speaker output may be in contact with the ground The temperature of the internal parts may be higher than 120 C 248 F The sigma servo connection may be erroneous The fuse of this unit may be blown The unit may be malfunctioning and sending DC signal to the s...

Page 6: ...NPUT LEFT RIGHT SPEAKER LEVEL INPUT MONO POWER AMPLIFIER L 25Hz 15Hz INFRASONIC OFF INPUT SENSITIVITY V LPF FREQUENCY Hz GND R LINE IN 0 3 0 5 1 2 3 4 5 0 2 150 100 70 50 200 LEFT RIGHT SPEAKER LEVEL INPUT RCA cable connection CENTER UNIT Cassette receiver CD receiver etc Power control cable Commercially available part RCA cable Commercially available part Do not connect cables and leads to both R...

Page 7: ... protective fuse into the battery wire close to the battery Use a protective fuse having a capacity that is about 10 A higher than the maximum current drawn by the amplifier Use vehicle type fire resistant power supply wiring wire for the battery wire and the ground wire The current capacity of the power supply wiring wire should be about 10 A higher than that of the protective fuse capacity which...

Page 8: ... servo terminals etc If the Sigma servo terminals are not connected the sound may fluctuate or noise may occur Be sure to connect the Sigma servo terminals correctly When connecting speakers in a parallel configuration use speakers with an impedance of 4 ohms or more Connecting speakers with smaller impedance than 4 ohms will cause malfunction The rated input of the speakers connected to this unit...

Page 9: ... calling service first check the following table for possible problems PROBLEM POSSIBLE CAUSE SOLUTION No sound No sound from one side The output level is too small or too large The sound quality is bad The sound is distorted Input or output cables are disconnected The connection of the sigma servo terminals is wrong Protection circuit may be activated The fuse may be blown because the volume was ...

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