Autotek MM404 Instruction Manual
EVOLUTION OF POWER
MEAN MACHINE
R
AMPLIFIERS
MM404 / MM1000.1D / MM1500.1D
MEAN MACHINE
AMPLIFIERS
Autotek is proud to introduce the finest high end car audio products available and would like to thank you for your continued support.
The Mean Machine Series products have been designed to a very high level of performance, with features unavailable in any other products.
All of the amplifiers have variable crossovers built in, with added touches such as subsonic filter, bass equalization and a bass remote control
module option that allows bass control from with in reach of the drivers seat.
To insure years of listening pleasure, all amplifiers have a built in diagnostic mode that will detect shorted speaker leads, low impedance,
dangerous high temperatures, DC shorts and will shut down the amp to help prevent serious damage.
General Installation Procedure.........................................................................................................................................................1
Amplifier Feature Descriptions..........................................................................................................................................................2
MM404 / 4 CHANNEL AMPLIFIER APPLICATIONS........................................................................................................................3
4, 3 and 2 channel full range / 2 way active, with mono bass /
front/rear high pass using a 2 channel model for mono sub bass
MM1000.1D / MM1500.1D / 1 CHANNEL AMPLIFIERS APPLICATIONS....................................................................................4-5
Basic D-Class mono amplifier application
Features and Specifications..............................................................................................................................................................6
Setting Up Systems After Installation For Best Performance..............................................................................................................7
Troubleshooting and Diagnostics......................................................................................................................................................8
Product Warranty..............................................................................................................................................................................9
The contents of this manual may not be reproduced or copied with out the
written consent of MAXXSONICS USA, Inc.
GENERAL INSTALLATION PROCEDURE
System Design
The success of any car stereo system relies on several factors, such as the system design, execution of the installation, and system setup. Please
remember that any system is only as good as its weakest link.
Please remember that higher power systems are not necessarily useful purely for high sound pressure levels, but also to establish a headroom capability, to
reproduce musical peaks cleanly without distortion. Lower power amplifiers will clip earlier than their more powerful cousins, and cause loudspeaker failure when
overdriven, due to the harmonics generated by a clipped signal, thus overheating voice coils.
Amplifiers should be mounted with the fins running horizontally for best convection cooling, to minimize overheating. Purchase the best quality RCA cables you can
afford, for reliability and less engine noise interference in the audio system.
Installation
WOOD
It is highly recommended that the amplifier be mounted to a board of MDF or other solid
structure using the 4 mounting screws provided. Avoid mounting the
amplifier to metal as this can introduce noise and other unwanted issues. When mounting
the amplifier, ensure that it is mounted HORIZONTALLY, as shown in the diagram above, for
optimal heat dissipation. Mounting amplifiers to speaker enclosures is not recommended as
this can cause damage to the amplifier components. When choosing a location for
mounting the amplifier, ensure that you check for clearance from wires, gas tank, electrical
devices and brake lines etc.
General:
Run the wiring so that RCA cables are at least 18“ away from power and speaker cables. Keep RCA cables away from electrical devices in the vehicle that can cause
electrical noise, such as electric fuel pumps, emission control modules and other on-board electronic modules.
Power and ground connections(see the features matrix on page 6 for proper gauge cables per amplifier):
Use a sufficient gauge power cable and ground cable using the chart below as reference to what size wire you require. The MM404 requires 4 gauge power wire
while the MM1000.1D and MM1500.1D require 2 gauge power and ground wire. In a multi amplifier system, add the total value of the manufacture recommended
fusing to get your total system amperage. Some applications may require multiple runs of power wire to meet the system requirements. In multi amplifier systems it
is advisable to mount a large enough fuse right at the battery, and run one or multiple +12 volt power cables to a fused distribution block near the amplifiers. It is then
a simple matter to connect the +12 volt terminal of each amplifier to the distribution block. During this process, please ensure that the main power fuse is removed to
avoid shorting the electrical system. The main fuse must be within 12” of the vehicles battery.
Ground each amplifier with as short a ground lead as possible directly to the vehicle chassis using the same wire size as the amplifiers’ power wire. Use a ground
distribution block, if you wish, but it is extremely important to keep the main ground lead from this distribution block to the chassis as short as possible , not more than
12“. The ground connection integrity to the chassis is very important, and the best way to achieve a good, solid electrical and mechanical contact is to use a large
round crimp lug, crimped and soldered to the ground cable. The next step is to scrape the paint off the vehicle chassis , slightly larger than the ground lug, at the
connection point. Drill a clearance hole in the chassis, the same size as the lug hole, and use a bolt, spring washer and nut to securely fasten the ground lug. Use
petroleum jelly to coat the bolt/lug connection, to prevent oxidization with time.
TIP: Use the same approach when installing head units, equalizers or any audio equipment for that matter - run short individual grounds from each piece directly to
the vehicle chassis, to minimize ground loops and system noise. All power, ground and speaker connections should be crimped and soldered for reliability. Make sure
that none of the cable insulation can chafe against exposed metal in the vehicle, causing short circuits to the chassis.
WIRE LENGTH
SYSTEM
AMPERAGE
35-50
50-65
68-85
85-105
105-125
125-150
7-10 ft. 10-13 ft. 13-16 ft.
8
6
4
4
4
2
6
4
4
2
2
0
4
4
2
2
0
0
16-19 ft. 19-22 ft. 22-28 ft.
4
4
2
2
0
0
4
4
2
2
0
0
4
2
0
0
0
0
NOTE: This Matrix is a general rule
of thumb. Please refer to the
WIRE GAUGE
manufacturers specific
requirements. Mean Machine
specifications can be found on
page 6.
Safe connection sequence:
After all cables are run, connect speaker wires to the speakers and amplifiers, then run and plug in RCA cables. Next, connect all power, ground, and remote turn on
leads. Now connect all +12 volt cables to the amplifier/s and distribution blocks and fuse holders. Finally, connect the main +12 volt cable to the battery, with the main
fuse removed, and we are almost ready to power up the system.
Power up the system:
The following procedure may seem like overkill, but there is nothing more frustrating when turning on a system for the first time, and it does not work properly
immediately.
First, make sure the head unit is off, and turn all level controls to minimum (counterclockwise), including the head unit volume control. Set all equalizers to 0 dB (no
boost), and all crossover frequency controls at approximate frequencies, as recommended by the loudspeaker manufacturer. Set all input selector and crossover
switches as required for the application. Remove all amplifier fuses, and insert the main fuse at the battery. If the fuse does not blow, you can insert the fuse in one of
the amplifiers, and we are ready to turn on the system. Turn the head unit on, insert a CD, or select a radio station, and increase the head unit volume control. If the
system sounds fine, turn off the head unit, and install fuses in the remaining amplifiers, one by one, till the complete system is powered up and functioning properly.
1
AMPLIFIER FEATURE DESCRIPTIONS
MEAN MACHINE AMPLIFIERS:
! Each model is capable of 4 & 2-Ohms stereo per channel, or 4-Ohms mono bridged ! All Autotek amplifiers feature a comprehensive diagnostic system, with speaker lead
operation except the mono amps which are capable of 4, 2 and 1-Ohm loads.
Tri-Mode operation with any stereo pair of amplifier channels is possible, as with all
!
bridgeable amplifiers.
! The input sensitivities for rated output powers are variable from 0.2 volts to 6 volts.
! All crossovers are fully variable in their respective ranges.
! Crossover filters are 12dB/Octave.
! A POWER LED indicates the powered up and turned on condition.
short circuit, and amplifier DC faults indicated by the red “PROTECT” LED.
CAUTION: DO NOT OPERATE ANY AMPLIFIER BELOW THE INTENDED
!
IMPEDANCE.. YOU WILL CAUSE DAMAGE TO THE AMPLIFIER THAT WILL NOT BE
COVERED UNDER THE WARRANTY PRINTED IN THE BACK OF THE MANUAL. 4
Channel amps are capable of 4 and 2-Ohms wired stereo and 4-Ohms wired mono
bridged. The mono amps are capable of 4, 2 and 1-Ohm.
The X-OVER slide switch selects the internal crossover functions:
X-OVER Channels 1&2:
-DUPE 3&4: Will bypass the crossover settings for CH1&2 and duplicate CH3&4 settings.
-HP: Selects the built in HIGH PASS filter, variable from 10 Hz to 1.2kHz.
-FULL: Bypasses all crossovers for full frequency range operation.
X-OVER Channels 3&4:
-LP: Selects the built in LOW PASS , variable from 30 Hz to 150Hz
-HP: Selects the built in HIGH PASS filter, variable from 10 Hz to 1.2kHz.
-FULL: Bypasses all crossovers for full frequency range operation.
BASS EQ: 45Hz bass boost variable from 0-9dB. (When CH1&2 X-OVER is in the DUPE
position, the BASS EQ function becomes available for CH1&2 as well.
INPUT MODE: The input mode switch allows you to choose 4CH for full range 4 channel
operation or 2CH for bridging operation.
LINE INPUT: The line input accepts unbalanced (RCA) inputs from 0.2V to 6V.
LINE OUTPUT: The line output passes through signal from the line inputs which allows
you to daisy chain multiple amplifiers from one signal. This signal is FULL RANGE
regardless of the X-OVER settings.
LINE INPUT: The line input accepts unbalanced (RCA) inputs from 0.2V to 6V.
LINE OUTPUT: The line output passes through signal from the line inputs which allows you
to daisy chain multiple amplifiers from one signal.
-The LINE INPUT signal is routed directly to the LINE OUT RCA jacks, regardless of the X-
OVER setting simplifying daisy chaining of amplifiers.
BALANCED INPUT: Accepts balanced line inputs from 0.2 volts to 18 volts.
LEVEL: Adjusts the input sensitivity from 0.2 volts to 6 volts.
PHASE: Fully variable time alignment from 0 to 180 degrees.
BASS EQ: Fully variable 45Hz bass boost from 0db to 9dB.
SUBSONIC: Allows you to adjust the crossover filter from 15Hz to 35Hz.
LOW PASS: Allows yo to adjust the LOW PASS crossover filter from 35Hz to 250Hz.
Each model is capable of 1ohm minimum.
Both models have MASTER / SLAVE capabilities for linking 2 models together.
BRIDGED PROTECT: When 2 amplifiers are used in the “Master / Slave” configuration,
you should use a standard RCA cable. With the RCA cable installed, if one amplifier goes
into the Protect Mode, it will automatically shut down the second amp to reduce the risk of
damage to the second amplifier.
MM404 4-CHANNEL AMPLIFIER
Note that the LOW PASS signal is MONO.
-In the LPF position, the HIGH PASS filter acts as a subsonic filter.
-When the LPF mode is selected, a 0 to +12dB, at 45Hz, BASS -EQ
is also switched in.
MM1000.1D / MM1500.1D 1-CHANNEL MONO AMPLIFIERS
The mono amps are capable of 4, 2 & 1-Ohm loads.
Operating the amp below 1-Ohm can cause damage to the amp not
covered in the warranty.
FUSE
+12V REM GND
POWER INPUT
BRIDGED
PROTECT
+ + - -
SPEAKER OUTPUT
2
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