Autotek ATX1000.2 User manual

AT-SERIES
AMPLIFIERS
ATX950.4 / ATX1200.4
ATX2000.1
ATX1000.2 / ATX1600.2 / ATX3000.2
EVOLUTION OF POWER
R

AT-SERIES AMPLIFIERS
INDEX PAGE
Autotek is proud to introduce the finest high end car audio products available and would like to thank you for your continued support.
The AT-Series amplifiers 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 High Level Inputs, Bass Equalization, Wide Range
Crossover controls with High Pass, Low Pass and selectable Mono / Stereo selector switch.
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 Procedures.....................................................................................................................................................................................1
- Mounting the amplifier / Wiring Requirements
Amplifier Feature Descriptions.......................................................................................................................................................................................2
ATX1000.2 / ATX1600.2 / ATX3000.2 / 2-CHANNEL AMPLIFIER APPLICATIONS...................................................................................................3-4
- Full range stereo / Full range mono / 2 way active with mono bass using two 2 channel models
ATX950.4 / ATX1200.4 / 4-CHANNEL AMPLIFIER APPLICATIONS.............................................................................................................................5
- Full range stereo / 3 channel full range system
ATX2000.1 / 1-CHANNEL AMPLIFIER APPLICATIONS................................................................................................................................................6
- Basic A/B mono amplifier application
Features and Specifications...........................................................................................................................................................................................7
Setting Up Systems After Installation For Best Performance.....................................................................................................................................8
Troubleshooting and Diagnostics..................................................................................................................................................................................9
Product Warranty...........................................................................................................................................................................................................10
Available Optional Equipment
ATK2/3X
2-Way / 3-WayActive Crossover with Remote Bass Control
- 2 & 4 channel inputs / Sub-Input for receivers with Sub Outputs / Bass Remote offers 12dB Bass Boost / Adjustable Level Output to 8.5 volts /
- 180 degree Phase Shift / 45Hz Bass Boost with Quasi-Parametric EQ / Level (gain) adjustments for front, rear and sub outputs / 2nd Order Butterworth
- Hi-Pass for front and rear channels
7007
4-Band EQ / 9 Volt Line Driver Signal Processor
- 4 band EQ and Line Driver / Dual Inputs with Level Matching / DIN, ISO Mount chassis / EQ controls with 12dB of Bass Boost - cut 45Hz Sub Bass - 120Hz
- Mid Bass - 2.2KHz Mid Range - 12KHz Treble / Master Volume and Subwoofer Volume / Front to Rear dual amp Fader / High Pass F/R Crossover - 12dB
Slope / Selectable Subwoofer Output - 50Hz - 80Hz - 120Hz at 18dB Slope
The contents of this manual may not be reproduced or copied with out the
written consent of MAXXSONICS USA, Inc.
Check out our videos of new products,
events and technical tutorials at
www.youtube.com/maxxsonicsusainc

GENERAL INSTALLATION PROCEDURE
1
System Design
Installation
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 RCAcables you can
afford, for reliability and less engine noise interference in the audio system.
General:
Run the wiring so that RCAcables are at least 18“ away from power and speaker cables. Keep RCAcables 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 7 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. AT-Series amplifiers require minimum 4
gauge power 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.Although the
amplifier may be fused directly, a main fuse must be installed on the main power cable with-in 12” of the vehicles battery.
Ground each amplifier with as short a ground lead as possible directly to the vehicle chassis using 4 gauge wire or equivalent to the size of 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.
Safe connection sequence:
After all cables are run, connect speaker wires to the speakers and amplifiers, then run and plug in RCAcables. 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.
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.
NOTE: This Matrix is a general rule
of thumb. Please refer to the
manufacturers specific
requirements. AT-Series
specifications can be found on
page 7.
7-10 ft. 10-13 ft. 13-16 ft. 16-19 ft. 19-22 ft. 22-28 ft.
SYSTEM
AMPERAGE
35-50
50-65
68-85
85-105
105-125
125-150
8
6
4
4
4
2
6
4
4
2
2
0
4
4
2
2
0
0
4
4
2
2
0
0
4
4
2
2
0
0
4
2
0
0
0
0
WIRE LENGTH
WIRE GAUGE

2
AMPLIFIER FEATURE DESCRIPTIONS
AT-SERIES AMPLIFIERS:
Each model is capable of 4 & 2-Ohms stereo per channel, or 4-Ohms mono bridged AllAutotek amplifiers feature a comprehensive diagnostic system, with speaker lead
short circuit, and amplifier DC faults indicated by the red “PROTECT” LED.
operation except the mono amps which are capable of 4, 2 and 1-Ohm loads. CAUTION: DO NOT OPERATE ANY AMPLIFIER BELOW THE INTENDED
Tri-Mode operation with any stereo pair of amplifier channels is possible, as with all IMPEDANCE.. YOU WILL CAUSE DAMAGE TO THE AMPLIFIER THAT WILL NOT BE
bridgeable amplifiers.
The input sensitivities for rated output powers are variable from 0.2 volt to 6 volts. COVERED UNDER THE WARRANTY PRINTED IN THE BACK OF THE MANUAL. 2 &
All crossovers are fully variable in their respective ranges. 4 Channel amps are capable of 4 and 2-Ohms wired stereo and 4-Ohms wired
Crossover filters are 12dB/Octave. mono bridged. The mono amps are capable of 4, 2 and 1-Ohm.
APOWER LED indicates the powered up and turned on condition.
NotethattheLOWPASSsignalisMONO.
-IntheLPF position,theHIGH PASS filteractsasasubsonicfilter.
-WhentheLPF modeisselected,a0to+12dB,at45Hz,BASS -EQ
isalsoswitchedin.
ATX1000.2 / ATX1600.2 / ATX3000.2 2-CHANNEL AMPLIFIERS
TheX-OVER slideswitchselectstheinternalcrossoverfunctions:
-TheinputsignalisrouteddirectlytotheLINE OUT RCAjacks,regardlessoftheX-OVER
settingsimplifyingdaisychainingofamplifiers.
-HPF: SelectsthebuiltinHIGH PASS filter,variablefrom60Hzto1.2kHz.
-FULL: Bypassesallcrossoversforfullfrequencyrangeoperation.
-LPF: SelectsthebuiltinLOW PASS ,variablefrom30Hzto250Hz.
MODE:ThemodeswitchallowsyoutochooseStereoforfullrange2channeloperationor
MONOforbridgingoperation
HIGH INPUT: Ifyourradio/CDplayer doesnot have unbalanced (RCA)outputs, you can
usetheHIGHlevel(wire)inputs.
LINE INPUT:Thelineinputacceptsunbalanced(RCA)inputsfrom0.2Vto5V.
LINE OUTPUT: The line output passes through signal from the line inputs which allows
youtodaisychainmultipleamplifiersfromonesignal.
LINE OUT LINE INPUT
R R
L L
+ - gnd - +
HI INPUT
6V 0.2V 0dB 12dB 60Hz 1.2KHz 30Hz 250Hz
LEVEL BASS EQ HPF LPF
FULL LPF HPF MONO STEREO
X-OVER MODE
-TheLINE INPUT signalisrouteddirectlytotheLINE OUT RCAjacks,regardlessoftheX-
OVER settingsimplifyingdaisychainingofamplifiers.
-SUBSONIC:Allowsyoutoadjustthecrossoverfilterfrom15Hzto55Hz.
-LPF:AllowsyotoadjusttheLOW PASS crossoverfilterfrom40Hzto150Hz.
MODE:Themode switchallowsyou tochooseStereo forfullrange 2channeloperation or
MONOforbridgingoperation
LEVEL: Adjuststheinputsensitivityfrom0.2voltsto6volts.
BASS EQ: TheBassEQisadjustablefrom0dbto12dB.
REMOTE: Thisistheinputjackfortheunder-dashbassremotemodule.
LINE INPUT:Thelineinputacceptsunbalanced(RCA)inputsfrom0.2Vto6V.
LINE OUTPUT:Thelineoutputpassesthroughsignalfromthelineinputswhichallowsyou
todaisychainmultipleamplifiersfromonesignal. 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.
AT2000.1 1-CHANNEL MONO AMPLIFIER
OUTPUT INPUT
L
R
L
R
6V 0.2V
LEVEL
0dB 12dB
BASS EQ
15Hz 55Hz
SONIC
SUB
40Hz 150Hz
LPF
REMOTE
CONTROL
POWER
PROTECT
The4channelampshavethesamefeaturesasthe2channelmodelsacceptthatthereare
2setsofcontrols.
1setforchannels1&2and1setforchannels3&4.
Inaddition, the4channelmodelshave aMode switchwhich allowsyoutoselect 2,3or4
channeloperation.
TheX-OVER slideswitchselectstheinternalcrossoverfunctions:
-TheinputsignalisrouteddirectlytotheLINE OUT RCAjacks,regardlessoftheX-OVER
settingsimplifyingdaisychainingofamplifiers.
-HPF: SelectsthebuiltinHIGH PASS filter,variablefrom60Hzto1.2kHz.
-FULL: Bypassesallcrossoversforfullfrequencyrangeoperation.
-LPF: SelectsthebuiltinLOW PASS ,variablefrom30Hzto250Hz.
MODE:ThemodeswitchallowsyoutochooseStereoforfullrange2channeloperationor
MONOforbridgingoperation
HIGH INPUT: Ifyourradio/CDplayer doesnot have unbalanced (RCA)outputs, you can
usetheHIGHlevel(wire)inputs.
LINE INPUT:Thelineinputacceptsunbalanced(RCA)inputsfrom0.2Vto6V.
LINE OUTPUT: The line output passes through signal from the line inputs which allows
youtodaisychainmultipleamplifiersfromonesignal.
NotethattheLOWPASSsignalisMONO.
-IntheLPF position,theHIGH PASS filteractsasasubsonicfilter.
-WhentheLPF modeisselected,a0to+12dB,at45Hz,BASS -EQ
isalsoswitchedin.
ATX950.4 / ATX1200.4 4-CHANNEL AMPLIFIERS
4CH MONO MIX
INPUT
CH1 CH1 CH3 CH3
CH4
CH4
CH2
CH2
INPUTOUTPUT
CHANNEL 1 / 2 CHANNEL 3 / 4
+ - GND - + + - GND - +
FULL FULL
LPF LPF HPF HPF
X-OVER X-OVER
30Hz 250Hz 30Hz 250Hz
60Hz 1.2KHz 60Hz 1.2KHz
0dB 12dB 0dB 12dB6V 0.2v 6V 0.2v
LPF LPF
HPF HPF
BASS EQ BASS EQ
LEVEL LEVEL
2 3 4
MODE

ATX1000.2 / ATX1600.2 / ATX3000.2 / 2 CHANNEL AMPLIFIER APPLICATIONS
3
FULL RANGE MONO
This is the most basic application for the SUPER SPORT Series 2 channel
amplifiers.
1. Interconnect cable checklist:
Connect the LINE INPUTS to the Radio/CD with good quality RCA cables.
2. Crossover Switch:
The X-OVER switch must be in the FULL position.
3. Crossover frequency control checklist:
N/Afor full range operation.
4. Line Level:
Refer to the section “Setting up systems after installation for best performance”.
NOTE: Minimum final loudspeaker impedances:
4 &-2-Ohms stereo mode or 4-Ohms mono mode
This amplifier will not do 1-Ohm stereo or 2/1-Ohm mono operation.
This application illustrates the basic mono bridging method for allAutotek 2 Switch setting checklist:
channel amplifiers. - The AMPLIFIER X-OVER switch must be in the FULL position.
Interconnect cable checklist:
Crossover frequency control setting checklist:
AMONO signal source is required, such as would be available from the mono N/Afor full range operation.
sub bass output of an active crossover, whether stand alone, or built into a head TIP:
Important: If you are using the mono sub bass output of an active crossover, there is unit or equalizer. Do not be tempted to connect the hot, or positive nothing wrong with switching in the low pass filter in these amplifiers for a
outputs, from any source together to obtain a mono signal, as this could very steeper low pass roll-off.
well damage the output stage of that source.
It is necessary to feed the SAME signal to both left and right inputs via a Y-
adapter RCAcable. Connect the mono speaker positive terminal to the LEFT +, Minimum final loudspeaker impedance:
and its negative terminal to RIGHT -. - 4-Ohms mono.
FULL RANGE STEREO
LINE OUT LINE INPUT
R R
L L
+ - gnd + -
HI INPUT
5V 0.2V 0dB 12dB 60Hz 1.2KHz 30Hz 250Hz
LEVEL BASS EQ HPF LPF
FULL LPF HPF MONO STEREO
X-OVER MODE
GND REM +12V
POWER INPUT FUSE SPEAKER OUTPUT
LEFT RIGHT
BRIDGED
POWER PROTECT
+ - + -
FULL RANGE
STEREO LINE INPUT
REMOTE TURN-ON
CHASSIS GROUND
TO BATTERY + 12 volts VIA FUSE
FULL RANGE
SPEAKERS
The HIGH LEVEL inputs are used when the radio/CD player does not have RCAcable outputs. You can connect the radio/CD player speaker wires directly
to the amplifier via the high Level Inputs.
GRAY: CH 1 Speaker Input +
BROWN: CH 1 Speaker input -
Black: Chassis Ground
GREEN: CH 2 Speaker Input -
White: CH 2 Speaker Input +
Use this connector for 2 CH amplifiers
LINE OUT LINE INPUT
R R
L L
+ - gnd + -
HI INPUT
5V 0.2V 0dB 12dB 60Hz 1.2KHz 30Hz 250Hz
LEVEL BASS EQ HPF LPF
FULL LPF HPF MONO STEREO
X-OVER MODE
GND REM +12V
POWER INPUT FUSE SPEAKER OUTPUT
LEFT RIGHT
BRIDGED
POWER PROTECT
+ - + -
FULL RANGE
MONO LINE INPUT
VIA Y-ADAPTER
FROM MONO SOURCE
FULL RANGE
MONO SPEAKER
REMOTE TURN-ON
CHASSIS GROUND
TO BATTERY + 12 volts VIA FUSE

ATX1000.2 / ATX1600.2 / ATX3000.2 2-CHANNEL AMPLIFIER APPLICATIONS
4
Stereo high pass with mono low-pass in a 2 way active, or bi-amplified system
2 CHANNEL
HIGHS AMPLIFIER
2 CHANNEL
SUB BASS AMPLIFIER
In this application we will use a 2 channel amplifier for the high frequencies, and Lows amplifier:
a second one for the low frequencies, or mono sub bass. Please consult the
speaker specifications to determine maximum amplifier power requirements. - HI PASS (Subsonic filter): 30 Hz to 50 Hz
- LOW PASS: 100 Hz
Interconnect cable checklist:
Connect the inputs of the HIGHS amplifier to a Radio/CD with good quality RCA Please note that these frequency points are suggestions only. Refer to the
cables. Connect the LINE OUT of the HIGHS amplifier to the inputs of the BASS loudspeaker manufacturer specifications and the section “Setting up systems
amplifier with a stereo RCAto RCAcable. after installation for best performance”
Level control checklist:
Mono bass woofer wiring: - Refer to the section “Setting up systems after installation for best performance”
Connect the mono speaker positive terminal to the LEFT +, and its negative
terminal to RIGHT -. Minimum final loudspeaker impedances:
- 2-Ohms per channel stereo.
Switch setting checklist:
- 4-Ohms mono bridged.
- Highs amplifier: X-OVER switch in the HPF position.
- Lows amplifier: X-OVER switch in the LPF position.
Crossover frequency control checklist: CAUTION: This amp is not capable of 1-Ohm wired stereo, 2 or 1-Ohm
Highs amplifier: wired mono bridged. Lower then recommended impedance will damage
- HI PASS: 100 Hz the amp and could possibly void the warranty.
- LOW PASS: N/A
LINE OUT LINE INPUT
R R
L L
+ - gnd + -
HI INPUT
5V 0.2V 0dB 12dB 60Hz 1.2KHz 30Hz 250Hz
LEVEL BASS EQ HPF LPF
FULL LPF HPF MONO STEREO
X-OVER MODE
GND REM +12V
POWER INPUT FUSE SPEAKER OUTPUT
LEFT RIGHT
BRIDGED
POWER PROTECT
+ - + -
LINE OUT LINE INPUT
R R
L L
+ - gnd + -
HI INPUT
5V 0.2V 0dB 12dB 60Hz 1.2KHz 30Hz 250Hz
LEVEL BASS EQ HPF LPF
FULL LPF HPF MONO STEREO
X-OVER MODE
GND REM +12V
POWER INPUT FUSE SPEAKER OUTPUT
LEFT RIGHT
BRIDGED
POWER PROTECT
+ - + -
FULL RANGE
STEREO LINE INPUT
STEREO
INTERCONNECT
RCA CABLE
STEREO
HIGHS
SPEAKERS
MONO BASS
SPEAKER
REMOTE TURN-ON
CHASSIS GROUND
TO BATTERY +12 Volts VIA FUSE
REMOTE TURN-ON
CHASSIS GROUND
TO BATTERY +12 Volts VIA FUSE

5
ATX950.4 / ATX1200.4 / 4 CHANNEL AMPLIFIER APPLICATIONS
4 CHANNEL FULL RANGE SYSTEM
2 or 3 CHANNEL FULL RANGE SYSTEM
Level control checklist:
Hereweshowhowtousethe4channelamplifiersasstraightforwarddiscrete4 -Refertothesection“Setting up systems after installation for best performance”
channelfullrangeunits.
Minimum final loudspeaker impedances:
Interconnect cable checklist:
- 2-Ohms per channel.
-ConnectthefourinputsoftheamplifiertoaRadio/CDwithqualityRCAcables.
Switch setting checklist:
- 1/2CH X-OVER: FULL
- 3/4CH X-OVER: FULL
Crossover frequency control checklist:
Channels 1/2:
- HI PASS: N/A
- LOW PASS: N/A
Channels 3/4:
- HI PASS: N/A
- LOW PASS: N/A
Crossover frequency control checklist:
Herewe showhow touse the4 channelamplifiers asfull range2 or3 channel Channels 1/2:
units by taking advantage of the mono bridging capability of all Autotek
amplifiers. - HI PASS: N/A
- LOW PASS: N/A
The following example shows how to create a 3 channel system by mono
bridgingchannelpair3/ 4.Inordertocreatea 2channelsystem,simplyfollow Channels 3/4:
theexampletoalsomonobridgechannelpair1/2. - HI PASS: N/A
- LOW PASS: N/A
Interconnect cable checklist:
-Connecttheinputsofchannelpair1/2toasuitablestereosource,e.g.ahead TIP: If youareusing themono subbass outputofan activecrossover, thereis
unitwithgoodqualityRCAcables. nothing wrong with switching in the low pass filter in these amplifiers for a
-AMONOsignalsourceisrequiredtobridgechannelpair3/4,suchaswouldbe steeperlowpassrolloff.
available from the mono sub bass output of an active crossover, whether
standalone,orbuiltintoaheadunitorequalizer. Level control checklist:
Important: Donotbetemptedtoconnectthehot,orpositiveoutputs,fromany -Refertothesection“Setting up systems after installation for best performance”
source together to obtain a mono signal, as this could very well damage the
outputstageofthatsource. Minimum final loudspeaker impedances:
- It is necessary to feed the SAME signal to both left and right inputs via a Y- - 2-Ohms per channel in stereo mode.
adapterRCAcable. - 4-Ohms mono bridged.
- Connect the mono speaker positive terminal to the LEFT +, and its negative
terminaltoRIGHT-asshown.
Switch setting checklist:
- 1/2CH X-OVER: FULL
- 3/4CH X-OVER: FULL
GND REM +12V
GND REM +12V
POWER INPUT FUSE
POWER INPUT FUSE
POWER PROTECT
POWER PROTECT
- Ch1 + - Ch2 +
- Ch1 + - Ch2 +
- Ch3 + - Ch4 +
- Ch3 + - Ch4 +
BRIDGED
BRIDGED
BRIDGED
BRIDGED
FULL RANGE
SPEAKERS
FULL RANGE
STEREO LINE
INPUTS
STEREO
FULL RANGE
OR HIGHS
SPEAKERS
MONO
OR SUB BASS
SPEAKER
1 STEREO
1 MONO
FULL RANGE
LINE INPUTS
REMOTE TURN-ON
CHASSIS GROUND
TO BATTERY + 12 Volts VIA FUSE
REMOTE TURN-ON
CHASSIS GROUND
TO BATTERY + 12 Volts VIA FUSE
4CH MONO MIX
INPUT
CH1 CH1
CH3 CH3
CH4
CH4
CH2
CH2
INPUTOUTPUT
CHANNEL 1 / 2 CHANNEL 3 / 4
+ - GND - + + - GND - +
FULL FULL
LPF LPF
HPF HPF
X-OVER X-OVER
30Hz 250Hz 30Hz 250Hz
60Hz 1.2KHz 60Hz 1.2KHz
0dB 12dB 0dB 12dB5V 0.2v 5V 0.2v
LPF LPF
HPF HPF
BASS EQ BASS EQ
LEVEL LEVEL
2 3 4
MODE
4CH MONO MIX
INPUT
CH1 CH1
CH3 CH3
CH4
CH4
CH2
CH2
INPUTOUTPUT
CHANNEL 1 / 2 CHANNEL 3 / 4
+ - GND - + + - GND - +
FULL FULL
LPF LPF
HPF HPF
X-OVER X-OVER
30Hz 250Hz 30Hz 250Hz
60Hz 1.2KHz 60Hz 1.2KHz
0dB 12dB 0dB 12dB5V 0.2v 5V 0.2v
LPF LPF
HPF HPF
BASS EQ BASS EQ
LEVEL LEVEL
2 3 4
MODE

FULL RANGE
STEREO LINE INPUT
NOT USED
Y-ADAPTOR
Note: You can use the Radio/CD designated mono line output
or a full range stereo line output. For full range stereo line output,
you will need an optional “Y-Adaptor” as shown
PARALLEL MONO
SUBWOOFERS
2-OHMS EACH MINIMUM
GND REM +12V
POWER INPUT FUSE
SPEAKER OUTPUT
+ + - -
6
ATX2000.1 / MONO AMPLIFIER APPLICATIONS
Basic application
SUBSONIC:15 Hz to 55 Hz
These sub bass amplifiers can be used in any of the bi-amplification systems BASS EQ: 0 to +12dB
described in this manual, replacing the 2 channel amplifiers as per the
illustrations. Level control checklist:
“Setting up systems after installation for best performance”
Interconnect cable checklist: Refertothesection
Connecttheinputstoasuitablesource,e.g. aheadunitwithgoodqualityRCA
cables.ConnecttheLINEOUTtotheinputsofthesystemhighsamplifier. Minimum final loudspeaker impedance: 1-Ohm.
Useatleast#12gaugespeakerwiring.Theampshavedualspeakerterminals,
simplifyingthehookupofmultiplespeakers
Crossover frequency control checklist:
LOW PASS: 40Hz to 150Hz
GND REM +12V
POWER INPUT FUSE
SPEAKER OUTPUT
+ + - -
OUTPUT INPUT
BASS SUB LOW
REMOTE
CONTROL
POWER
PROTECT R R
L L
0dB 12dB 15Hz 55Hz 40Hz 150Hz 6V 0.2V
BOOST SONIC PASS LEVEL
REMOTE TURN-ON
CHASSIS GROUND
TO BATTERY +12 Volts VIA FUSE
DESIGNATED MONO
OUTPUT FROM HEAD UNIT
MONO
SUBWOOFER
utotek
a
0dB 18dB
ATR-1

7

8
SETTING UP SYSTEMS AFTER INSTALLATION FOR BEST PERFORMANCE
ATX2000.1
General:
At this point you are ready to get more specific on the settings for your amplifier.
Subsonic:
This setting acts as a low frequency cut off for your system bass reproduction. The point that you set it at cuts off any frequencies from reproduction beyond this point. The 12 o’clock
position is a great starting point. EXAMPLE: If you adjust the Subsonic to 25Hz, the amplifier will not play frequencies below 25Hz but will play frequencies from 25Hz to the chosen Low
Pass frequency.
Bass EQ:
This setting is a fixed bass boost at 45Hz that is variable from 0-12dB. This feature provides impact to your bass, but if not adjusted correctly, it can be over used and cause damage to
your subwoofers and amplifiers. It is best to slowly turn this setting clockwise until the desired punch is felt. It is not recommended to exceed the 12 o’clock position unless listening at a low
volume or a low recording quality as this can result in high distortion and possibly clipping.
Low Pass:
The Low Pass control acts as a ceiling and doesn’t allow frequencies to the right of the desired setting to be reproduced. The 12 o’clock position is a great starting point. EXAMPLE: If you
adjust the Low Pass to 80Hz, the amplifier will not play frequencies above 80Hz but will play frequencies from 80Hz to the chosen Subsonic frequency.
Level Control Setup:
Ensure that the Level is turned completely to the left prior to turning the system on. Next you should insert a CD or cassette that you are familiar with to use as a reference, and turn the
head unit volume control to about 80% of its full setting. The system sound level will of course be very low, and the following procedures will help you to match the amplifier input
sensitivities properly to the head unit output signal level.
It is important to match the amplifier LEVEL input sensitivity to the Radio/CD output sensitivity. This can be located in the Radio/CD manual.
If the Radio/CD output sensitivity is 2 volts, then adjust the amplifier LEVEL input to 2 volts.
If you are not sure what the Radio output sensitivity is, follow these general guide lines:
Turn the level control up slowly, till you hear distortion, then back off a few degrees on the control. If at any point your amplifier goes into protection, you will need to turn the Level to the left
a bit and then try again. If you reach a point where the output does not increase, stop turning the Level control to the right as the amplifier/subwoofer combo has reached its maxx output in
this application.
Sit back and enjoy the music!
ATX1000.2 / ATX1600.2 / ATX3000.2 / ATX950.4 / ATX1200.4
General:
At this point you are ready to get more specific on the settings for your amplifier.
High Pass:
-When in Hi Pass operation, this setting acts as a low frequency cut off for your system reproduction. The point that you set it at cuts off any frequencies from reproduction beyond this
point. The 12 o’clock position is a great starting point. EXAMPLE: If you adjust the High Pass to 100Hz, the amplifier will not play frequencies below 100Hz but will play frequencies from
100Hz to the chosen Low Pass frequency.
-When in Low Pass/Bandpass operation, this setting acts as a low frequency cut off for your system reproduction aka Subsonic Filter. The point that you set it at cuts off any frequencies
from reproduction beyond this point. The 12 o’clock position is a great starting point. EXAMPLE: If you adjust the High Pass to 25Hz, the amplifier will not play frequencies below 25Hz but
will play frequencies from 25Hz to the chosen Low Pass frequency.
-When in Flat/Full operation, the High Pass crossover is bypassed.
Bass EQ:
This setting is a fixed bass boost at 45Hz that is variable from 0-12dB on all models. This feature provides impact to your bass, but if not adjusted correctly, it can be over used and cause
damage to your speakers and amplifiers. It is best to slowly turn this setting clockwise until the desired punch is felt. It is not recommended to exceed the 12 o’clock position unless
listening at a low volume or a low recording quality as this can result in high distortion and possibly clipping.
Low Pass:
The Low Pass control acts as a ceiling and doesn’t allow frequencies to the right of the desired setting to be reproduced. Turning the potentiometer all the way to the right is a great starting
point. EXAMPLE: If you adjust the Low Pass to 120Hz, the amplifier will not play frequencies above 120Hz but will play frequencies from 120Hz to the chosen Hi Pass or Subsonic
frequency.
-When in Hi Pass operation, this setting is bypassed.
Level Control Setup:
Ensure that the Level is turned completely to the left prior to turning the system on. Next you should insert a CD or cassette that you are familiar with to use as a reference, and turn the
head unit volume control to about 80% of its full setting. The system sound level will of course be very low, and the following procedures will help you to match the amplifier input
sensitivities properly to the head unit output signal level.
It is important to match the amplifier LEVEL input sensitivity to the Radio/CD output sensitivity. This can be located in the Radio/CD manual.
If the Radio/CD output sensitivity is 2 volts, then adjust the amplifier LEVEL input to 2 volts.
If you are not sure what the Radio output sensitivity is, follow these general guide lines:
Turn the level control up slowly, till you hear distortion, then back off a few degrees on the control. If at any point your amplifier goes into protection, you will need to turn the Level to the left
a bit and then try again. If you reach a point where the output does not increase, stop turning the Level control to the right as the amplifier/speaker combo has reached its maxx output in
this application.
2 or 3 way active systems (all):
Alwaysstartwiththebass,orlowfrequencyamplifierasareference,byturningitscontroluptothepointwheredistortionisaudible,andbackitoffsome.
Nowadjustthelevelcontrolforthehighsortweeterchannelsina2wayactivesystem,tobalancethehighstolows.
Ina3wayactivesystem,matchthemidrangeleveltothebass,andthenthehighstothemidrangeandbass.Itmaybenecessarytoperformafewiterationsofthemidrangeandhighslevelcontrol

9
TROUBLESHOOTING A SYSTEM
The key to finding the problem in a misbehaving sound system is to isolate parts of that system in a logical fashion to track down the fault.
Description of the PROTECT system built into allAutotek amplifiers
Thediagnosticsystemwillshut downthe amplifier, untilresetbyturningtheheadunitoff,andbackon.Thisstateofaffairswill beindicatedbythe frontpanelPROTECTLED
lightingupunderthefollowingconditions:
1-Asortcircuitontheloudspeakerleads.
2-AninternalamplifierfaultthatcausesaDCoffsetontheloudspeakeroutput.
Shouldtheamplifiergointoprotectmode,simplydisconnectallRCAandspeakerleads,whilekeeping+12volt,powergroundandremoteleadsconnected.
1.Nowturntheamplifierbackon,andifthediagnosticLEDlights,theamplifierhasaninternalfault.
2.Ifnot,plugtheRCAcablesback,andresettheamplifier.Ifitgoesintodiagnosticnow,thefaultliesintheinput,eitherwithbadcablesorsourceunit.
3.IftheamplifierseemsfinewithRCAcablespluggedin,connectthespeakers,oneatatime,andifoneofthespeakersoritswiringisfaulty,itwillactivatethediagnosticsystem.
Amplifier heatsink overheating
Theamplifierswillshutdownwhentheheatsinktemperaturereaches80degreescentigrade,andturnbackononcetheunithascooleddownbelowthatpoint.
Causes of overheating:
1-Inadequatecooling-relocateorremounttoprovidebetternaturalairflowoverthefins.
2 - Driving high power levels into low impedances - back off on the volume control, and/or make sure you are not loading the amplifier with less than the recommended
loudspeakerimpedance.
Low output power
1-Checkthatlevelcontrolshavebeensetupproperly.
2-Makesurethatthebatteryvoltage,asmeasuredattheamplifier’s+12voltandgroundterminals,is11voltsormore.
3-Checkall+12voltandgroundconnections.
Fuses blowing
1-Theuseofloudspeakerimpedancesbelowtherecommendedminimumswilldrawmorecurrent-check.
2-Ashortonthemain+12voltcablefromthebatterytothevehiclechassiswillcausethemainfusetoblow.
3-Ifanamplifierfuseblowscontinually,withonly+12volt,groundandremoteleadsconnected,theamplifiermaybefaulty.
System does not turn on
1-Checkallfuses.
2-Checkallconnections.
3-Measurethe+12voltandremoteturnonvoltagesattheamplifierterminals.Ifthesearenonexistentorlow,takevoltagemeasurementsatfuseholders,distribution blocks,
theheadunit’s+12voltandremoteleadstolocalizetheproblem.
Noise problems
Systemnoisecanbedividedintotwocategories,hiss,andelectricalinterference.
Hiss, or white noise
1 - High levels of white noise usually occurs when amplifier level controls are turned up too high - readjust according to the procedures in section ”Setting up systems after
installation for best performance”
2-Anothermajorproblemthatcancauseexcessivehiss,isanoisyheadunit-unplugtheamplifierinputRCAcables,andifthehisslevelreduces,thesourceunitisatfault.
Electrical interference
Theinsideofanautomobileis avery hostileelectricalenvironment.Themultitudeofelectricalsystems,suchastheignitionsystem,alternator, fuelpumps, airconditioners,to
mentionjustafew,createradiatedelectricalfields,aswellasnoiseonthe+12voltsupplyandground.Remembertoisolatetheproblem-firstunplugamplifierinputRCAcables,
ifthenoiseisstillpresent,checkthespeakerleads,ifnot,plugtheRCA’sback,andinvestigatethesourcedrivingtheamplifier,onecomponentatatime.
Aticking or whine that changes with engine RPM:
1-ThisproblemcouldbecausedbyradiationpickupofRCAcablestooneartoafuelpumporadistributor,forinstance,-relocatecables.
2-Checkthattheheadunitgroundisconnectedstraighttothevehiclechassis,anddoesnotusefactorywiringforground.
3-Trytosupplytheheadunitwithaclean+12voltsupplydirectlyfromthebattery+,insteadofusingasupplyfromtheindashwiring/fusebox.
Aconstant whine:
Thistypeofnoisecanbemoredifficulttopinpoint,butisusuallycausedbysomekindofinstability,causingoscillationsinthesystem.
1-Checkallconnections,especiallyforgoodgrounds.
2-Makesurethatnospeakerleadsareshortingtoexposedmetalonthevehiclechassis.
3-RCAcablesarenotoriousfortheirproblematicnature,socheckthatthesearegood,inparticulartheshieldconnections.

Maxxsonics Limited Warranty
As the manufacturer of Maxxsonics, Autotek, Crunch, MB Quart and Hifonics car audio
products Maxxsonics USA Inc. Warrants to the original consumer purchaser the amplifier
to be free from defects in material and workmanship for one (1) Year from date of purchase.
All other parts and accessories of the system are warrantied to be free from defects in
material and workmanship for one (1) year from date of purchase. Maxxsonics will
repair or replace at it’s option and free of charge during the warranty period, any system
component that proves defective in materials and workmanship under normal installation,
use and service provided that the product is returned to the authorized Maxxsonics dealer
from where it was purchased. A photo copy of the original receipt must accompany the
product being returned.
Valid purchase receipts will contain the name and address of the authorized reseller.
Any damage to the product as a result of misuse, abuse, accident, incorrect wiring,
improper installation, alteration of date code or bar code labels, revolution, natural
disaster, or any sneaky stuff because someone messed up, repair or alteration out side
of our factory or authorized service centers and any thing else you have done that you
should not have done is not covered.
This warranty is limited to defective parts and specifically excludes any incidental
or consequential damages connected therewith. This warranty is not to be construed
as an insurance policy.
Warranty on installation labor, removal, re-installation and freight charges are not the
responsibility of Maxxsonics USA Inc.
Warranty products damaged as a result of insufficient or improper packing materials
are not covered by this limited warranty and such damaged product will be returned
“as is” at the expense of the owner.
10
AT-SERIES
FOR EXTENDED WARRANTY INFORMATION, PLEASE VISIT
WWW.MAXXWARRANTY.COM

11
Accessories
LEVEL
BYPASS
NORMAL
RED - CLIP
GREEN - 9V
-20dB 0dB
-6dB
INPUT
LEVEL
PHASE BOOST
PARAMETRIC BASS EQ
BANDWIDTH FREQUENCY
0.2V 180 +10 dB 100Hz9V 0 0dB 30Hz
MAXX-LINK
MLX-100
SUBSONIC
FILTER
24 dB/OCT
LOW PASS
FILTER
24 dB/OCT
OUTPUT
LEVEL
MODE
ON
SLAVE
OFF
MASTER
RED - CLIP
GREEN - 9V
TEST TONE
65Hz
35Hz250Hz 1V 9V
5V
7V3V
15Hz35Hz

12
OEM Integration
Accessories
MX-1 Premium High To Low Level Converter
Low Level Outputs
* High Level Inputs: Accepts all types of High level Inputs
including floating ground and high voltages up to 30 volts.
* Audio Signal Sense / Hardwire Turn-On: Audio sense detects
music signals from the OEM wires and activates the MX-1. As
an option, the module also offers a remote turn-on wire.
* Parametric Bass EQ: Features Bass Boost, adjustable Band
Width (wide & narrow), Low Pass and Subsonic Filter.
* Clipping Indicators: Visually indicates audio signals Pre-Clip,
Soft Clip and Hard Clip
* Balanced Line Output: Ultra clean DIN variable high voltage
output for driving mono amps.
* Remote Output: Driver circuit to turn on amplifier when
module activates.
* Bass Remote: Features for subwoofer Level control with built-
in clipping indicators.
* Input & Output Level Control: Allows for gain matching both
radio and amplifier audio signals.
* Converts High Level OEM speaker wires to Ultra Clean RCA
MX-2 Deluxe High To Low Level Converter
* Converts High Level OEM speaker wires to Ultra Clean RCA
Low Level Outputs
* High Level Inputs: Accepts all types of High level Inputs
including floating ground and high voltages up to 30 volts.
* Audio Signal Sense / Hardwire Turn-On: Audio sense detects
music signals from the OEM wires and activates the MX-2. As
an option, the module also offers a remote turn-on wire.
* Remote Output: Driver circuit to turn on amplifier when module
activates.
MX-3 Bass Controller
* Parametric Bass EQ: Provides a wide array of subwoofer output signal
shaping controls to enhance bass response and sound quality including
Bass Boost, adjustable Bandwidth (wide and narrow), Low Pass and
Subsonic Filter.
* Accepts a wide range of incoming music signal levels while
accommodating all types of head units and signal processors and
controlling the output level to the amp to maximize a signal strength up to
9 volts.
* Clipping Indicators: Visual clipping indicators provide indication of
damaging clipped signals to help protect the subwoofer(s) and amplifier.
Includes pre-clip, soft-clip and full-clip indications.
* Music Shaping: Shapes the music signal to achieve deep bass notes as
low as 15Hz.
* Bass Remote: Included bas Remote features built-in clipping indicators
allows direct bass control from in-dask or under-dash.
MX-4 Add A Sub High To Low Level Converter
* Converts High Level OEM speaker wires to Ultra Clean RCA Low Level
Outputs
* High Level Inputs: Accepts all types of High level Inputs including
floating ground and high voltages up to 30 volts.
* Audio Signal Sense / Hardwire Turn-On: Audio sense detects music
signals from the OEM wires and activates the MX-4. As an option, the
module also offers a remote turn-on wire.
* Remote Output: Driver circuit to turn on amplifier when module activates.

PART#A1210