MAC Audio FEARLESS 4000 D Owner'S Manual Download

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Dear MAC AUDIO Customer,

The FEARLESS 4000 D car hifi power amplifier will enable you to satisfy your high demands on sound reproduction in your car. With its
impressive deep-bass power reserves, low harmonic content and neutral reproduction, the FEARLESS 4000 D takes car hi-fi to new heights.
The amplifier is characterized by low operating current, rapid switching capabilities and excellent temperature stability. Increased output
power can be achieved by switching two amplifier channels in an amplifier together in bridging mode. Experience and enjoy how this high-
tech machine perfectly reproduces magnificent sound.

Please read all of the owner’s manual before installing and using the amplifier.

1. TECHNICAL DATA

FEARLESS 4000 D

Stereo / Bridged

Max. output power (1 kHz sinus burst 2:8, B+=14.4V)

4 x 300 W / 2 x 900 W on 4 Ohm

Nominal output power (DIN 45 324, B+=14.4V)

4 x 150 W / 2 x 400 W on 4 Ohm

Max. output power (1 kHz sinus burst 2:8, B+=14.4V)

4 x 400 W

on 2 Ohm

Nominal output power (DIN 45 324, B+=14.4V)

4 x 200 W

on 2 Ohm

Loudspeaker impedance (stereo mode)

2 – 8 Ohm

Frequency response

5 – 75 000 Hz (-3 dB)

Total harmonic content (DIN 45 403)

< 0.03% (1 kHz)

Stereo separation (IEC 581 )

> 65 dB (1 kHz)

Weighted noise distance (IEC A)

> 100 dB

Input sensitivity LOW LEVEL INPUT

0.4 – 4 V

Input impedance LOW LEVEL INPUT

30 kOhm

Low-pass filter

40 – 400 Hz, 12 dB per octave

High-pass filter

40 – 400 Hz, 12 dB per octave

Bass boost

0 – 12 dB at 45 Hz

Supply

+12 V (9 – 15 V), minus to ground

Fuse

3 x 25 A

Sizes (W x H x D)

467 x 59 x 290 mm

Weight 5.8

SUBJECT TO TECHNICAL CHANGE

2. FEATURES

Complementary push-pull final stage

Stable at 2 ohms

Infinitely adjustable high-pass filter

Infinitely adjustable low-pass filter

Infinitely variable bass equalisation

Gilded cinch connections

Bridgeable 4-/3-/2-channel mode

Electronic protective circuit against short circuiting, DC offset and excess temperature

Mute switch for suppressing switch-on crackle interference

Capsulated and gilded loudspeaker and power-supply screw terminals

Status indicator (green LED) and overload indicator (red LED)

Remote control for regulating the volume of the rear channels (CH3 / CH4)

3. IMPORTANT INSTALLATION INFORMATION

This appliance may only be connected to a 12 volt system with negative ground.

The heat radiated when the amplifier is used means that sufficient air circulation is required at the place of installation. It is very important
that the cooler’s cooler ribs do not contact any metal plating or any surfaces which could impair air circulation. The amplifier may not
be installed in small confined spaces or spaces without air circulation (e.g. spare wheel recess or under the vehicle carpeting).
Installation in the boot is recommended.

Install the amplifier in such a way that it is protected as far as possible against vibrations and dust and dirt.

Make sure that the input/output cables are sufficiently distant from the power supply cables as otherwise interference may occur.

Make sure that the fuse and operating elements are accessible after installation.

The appliance’s reliability and performance depend on the quality of installation. Preferably get an expert to install the system,
particularly if you want to install several loudspeakers or a complex multi-way system.

4. CONNECTIONS

4.1 POWER SUPPLY AND AUTOMATIC SWITCHING ON

Important notice: Before commencing the installation, disconnect the plus terminals from the car battery in order to prevent

short circuits.

The power cabling usually installed in on-board car networks is not sufficient for a power amplifier’s demands. Make sure that the power
lines to GND and to the +12 V terminal have been sufficiently specified. A cable cross-section of at least 16 mm² must be used to connect
the battery to the amplifier’s terminals.

First connect the amplifier’s GND terminal to the battery’s minus pole. It is very important that the connection is good. Dirt residues must
be carefully removed from the battery’s connection point. A loose connection may cause malfunctions or interference noise or distortion.

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