Aunex AMX Series User manual

AMX Series Ampliers
Mini IPX Class D Digital Amplier Series
Models: AMX600.2D, AMX800.4D, AMX900.6D
Installation and Operation Manual
Please take time to thoroughly read through this manual to familiarize yourself with your new amplier.
This will ensure that your amplier will perform at its optimum capabilities.
Para obtener una copia de este manual en español, visite www.aunexusa.com y luego vaya a la página
del producto que necesita. Haga clic en la pestaña Soporte y descargue su manual en español.
AMX900.6D
FULL RANGE DIGITAL

1
Congratulations and thank you for purchasing an Aunex AMX Series
Amplier. This product has been engineered and manufactured
utilizing precision quality parts and craftsmanship. Improvements
in sound quality and system performance will be greatly enhanced
with the use of this amplier.
To ensure maximum performance we highly recommend you have
your new Aunex product installed by an Authorized Aunex Dealer.
Should you decide to install this product yourself, please make
sure to read this manual thoroughly to familiarize yourself with
the necessary installation requirements and tuning procedures.
Please read your warranty and retain a copy of your purchase
receipt and original carton should your equalizer ever needs
to be serviced and warranted.
Visit our website for the latest information on all Aunex products
at: www.aunexusa.com. If you have any questions regarding
this product, please contact your Authorized Aunex Dealer for
assistance or call / email Aunex Technical Support Department at
[phone] / [email protected].
Caution: Continuous exposure to sound pressure levels over 100dB
may cause permanent hearing loss. High powered audio systems can
produce sound pressure levels that can exceed over 150dB. Please limit
your exposure to continuous high listening volumes.

2
General Feature Set of the AMX Series Ampliers
• Heavy Density Aluminum Extruded Heatsink
• IPX67 Element Ready
• Die Cast End Cap with Tone Control Access Panel
• 4 Layer PCB, SMD Technology
• Conformal Coated PCB
• Dierential Balanced RCA Inputs
• Fully Variable Crossover 12dB/Octave Slope
• Output Clipping Indicators
• Autosensing in High Level Input Mode
o Remote Input Becomes Remote Output Trigger if High
level Input is used.
• Power and Protection Logo Illuminated Status Indicator
o Blue Indicates Amplier is powered On
o Red Indicates the Amplier is in Protection
• Pigtails Power & Ground Connectors
• Pigtails Low Level RCA Input Connectors
• Pigtails Speaker Outputs Connectors
• Pigtail 3.5mm Auxiliary Input
• Advance Protection Circuit Monitoring: Short, Thermal, Overload
and Impedance
• Finish: Anodized with Brush Finish
AMX600.2D Feature Specic
• Dual Boost Circuitry Active in HP and LP Modes 0 – 18dB
• Pigtails Low Level RCA Output Connectors
AMX800.4D Feature Specic
• Input Mode Selector (2Ch. or 4Ch.)
• Pigtails Low Level RCA Output Connectors
AMX900.6D Feature Specic
• Input Mode Selector (2Ch. or 6Ch.)

3
What’s Included
• (1) AMX Series Mini Amplier
• (1) In-Line Fuse Holder with Mini ANL Fuse
o AMX600.2D is supplied with a 60A Fuse
o AMX800.4D is supplied with a 80A Fuse
o AMX900.6D is supplied with a 100A Fuse
• RCA Input Connectors
o (1) Pair on the AMX600.2D
o (2) Pairs on the AMX800.4D
o (3) Pairs on the AMX900.6D
• RCA Output Connectors
o (1) Pair on the AMX600.2D & AMX800.4D
• (1) Speaker Output Connector
• (4) Self Tapping Screws and (4) Washers
• (1) Instruction Manual
• (1) Sticker
Important Safety Considerations
• To prevent personal injury and damage to the unit, please read
the follow the instructions in this manual.
• This product is designed to use in vehicles with 12Volt,
negative-ground electrical systems.
• Install this product in a dry location away from your vehicles’
safety equipment (airbags, seat belt system, etc.). Water and
humidity may damage internal components.
• Use the included mounting accessories to secure this product
so that it does not come loose.
• Check before drilling to make sure you do not drill into any vital
vehicle system.
• Protect all system wiring from sharp metal edges.
• Do not disassemble or modify this unit; doing so will void your
manufacturer’s warranty.

4
Important Installation Precautions
Installation of mobile audio equipment requires experience.
Although this manual provides general installation procedures,
it will not show the exact installation method for your particular
vehicle.
If you do not have the required knowledge and experience,
we recommend that you have your equipment installed by an
Authorized Aunex Dealer.
• Turn o all stereo and other electrical devices before you begin.
• Disconnect the negative (-) lead from your vehicle’s battery to
avoid an electrical short. Reconnect the negative lead to your
battery once your installation is complete. So, in other words
the negative lead from our vehicle’s battery is the rst
connection you remove before starting your installation and
the last connect your make after you nish your installation.
• Check your mounting location to make sure there is sucient
room for your installation placement preference.
• Install this product in a dry location away from your vehicles’
safety equipment. Each AMX Series amplier circuit board
has been coated with a protective layer of Conformal
Coating. This will help protect the electronic circuit from harsh
environments that may contain humidity and a range of
airborne contaminants and varying temperatures. In addition,
each AMX Series amplier has a Tone Control Access panel
which will prevent water from entering the amplier circuit board.
However prolonged exposure to extreme water and high
humidity may damage internal components in time so keeping
the amplier dry and installed in a well-ventilated area will help
ensure many years of listening enjoyment.
• When running power cables through sheet metal it is best to use
grommets and loom to properly insulate your cables from metal
edges.
• Avoid mounting the amplier with the top ns facing down as
this may increase the operating temperature of your amplier.
• If mounting underneath a seat, make sure that there is at least
1 inch (25mm) of space above the amplier to permit proper
cooling.
• Avoid mounting the ampliers on a subwoofer enclosure as
prolonged excessive vibration may damage your amplier.

5
Mounting Placement
Choose a structurally sound location to mount your Aunex
amplier, making sure there are no items behind the area where
the screws will be driven.
For optimum sound quality, it is highly recommended that you
purchase Aunex wiring accessories as they are designed to give
your ampliers high-quality signal it needs to operate at peak
performance levels. Aunex provides a wide selection from
RCA cables and power wire to speaker wire and battery
connectors.
In order to access the tone controls on your AMX amplier,
you will rst need to loosen the screws from the metal Access
Panel, then you will need to push aside the rubber gasket. Once all
adjustments have been made, place the rubber gasket back in
place and realign the metal access panel. Then, tighten back all
screws hand-tight.
Side Panel Layout

6
AMX600.2D
Input Gain
MinMax
Filter Freq.
40Hz 400Hz
Clip
Aux
Input
Preouts
Inputs
X-Over Filter
HPFullLP
Boost Eq.
0dB 18dB
Speaker Outputs
Bridge
Ch.1 Ch.2
+12V Remote Ground
AMX800.4D
Input Gain
Min Max
Input Gain
Min Max
Filter Freq.
40Hz 400Hz
Filter Freq.
40Hz 400Hz
Clip Clip
Aux
Input
Preouts
Inputs
X-Over Filter
LPFullHP
X-Over Filter
HPFullLP
2 Ch. 4 Ch.
Input Mode
Ch.3 & Ch.4 Ch.1 & Ch.2
+12V Remote Ground
BridgeBridge
Ch.1 Ch.2Ch.3 Ch.4
Speaker Outputs
Side Panel Layout Continued
1
9
9
2
10
10
3 4 5 6 7 8
AMX800.4D
AMX600.2D
11
11
12
12
1 1
55
62 2 73
13
3 8

7
Side Panel Layout Continued
AMX900.6D
Input Gain
Input Gain
MinMax
MinMax
Input Gain
MinMax
Ch.1 & Ch.2Ch.3 & Ch.4
Ch.5 & Ch.6
Filter Freq.
40Hz 400Hz
Filter Freq.
Filter Freq.
40Hz 400Hz
40Hz 400Hz
Clip
Clip
Clip
Aux
Input Inputs
X-Over Filter
HPFullLP
X-Over Filter
X-Over Filter
HPFullLP
HPFullLP
2 Ch. 6 Ch.
Input Mode
+12V Remote Ground
BridgeBridgeBridge
Ch.1 Ch.2 Ch.3 Ch.4 Ch.5 Ch.6
Speaker Outputs
AMX900.6D
9 10 11 12
5 215 13
18 126 23 3

8
1. Input Gain: Use these Input Gain Potentiometers to match the
output voltage of your headunit / source unit to the input circuit
of your amplier. These Input Gains are not a volume knob. A
simple method of setting your Input Gains is to turn your
headunit / source unit up to approximately ¾ volume. Then
slowly adjust your Input Gains on your ampliers clockwise until
you can hear distortion from your speakers or subwoofers. Then
turn the gains down (counterclockwise) till the distortion is no
longer heard and your clipping indicators are not lit.
2. Crossover Filter Selector: Depending on how you will use your
AMX Amplier, you will select the appropriate setting on the
Crossover Switch. Set the Crossover Switch to LP mode if you
are using Subwoofers or MidBass drivers. Set the switch to HP
if you want the amplier’s internal crossover to serve as a high
pass lter. When the switch is set to the Full position will allow
the amplier to send its full bandwidth to your speakers. Avoid
changing the crossover switches with the audio system
playing at high volumes as this may damage your speakers.
3. Filter Frequency Filter: This potentiometer is used to adjust the
crossover frequency from 40Hz – 400Hz in both HP Mode (High
Pass) and LP Mode (Low Pass).
4. Boost Eq: The AMX600.2 amplier incorporates a two stage
Boost Eq. circuit that is not only active in Low Pass Mode but is
also active in High Pass Mode. In Low Pass Mode, the Boost
Eq. can increase output 0-18dB centered at 45Hz. In High Pass
Mode, the Boost Eq can increase output 0-18dB centered at
12kHz. (The AMX800.4D and AMX900.6D do not
incorporate this Boost Eq. feature.)
Note if you turn up the Boost Eq, you will need to readjust
the Input Gains to avoid clipping the output signal. Using the
Clipping LED’s will help set your Boost Eq and Input Gains
properly.
Side Panel Layout Continued

9
5. Clipping Led Indicators: These LED’s will light up when the
amplier output signal is being clipped. When the LED’s starts
to glow, your amplier output is between 1-2% THD (Total
Harmonic Distortion). When the clipping indicators are fully lit,
your amplier output is between 6-7% THD (Total Harmonic
Distortion). The ideal gain setting is where the clip indicators are
not lit allowing the amplier to send undistorted clean output.
Setting the ampliers gains improperly where the clip indicators
are always lit will over-work the amplier and may cause
excessive heat building and possibly product failure.
6. Aux Input: This 3.5mm Auxiliary Input can be used to send
audio signal from your phone or portable music player directly to
the amplier. Note that both your Low-Level RCA Input and
Auxiliary Input are both capable of accepting audio signal
simultaneously, so to prevent cross talk on both signals, it is best
to turn o one source if both are connected to your amplier.
7. Low Level RCA Preouts: This pair of RCAs Preouts
can be used to send audio signal from your amplier to
another amplier without the need of using RCA Splitter Y-Cables.
(The AMX900.6D does not have RCA preouts)
8. Low Level RCA Inputs: These are your dierential balanced
inputs that are used to connect audio signal from your headunit
/ source unit to your amplier. Your AMX Series Amplier is
capable to receiving either High Level Speaker Outputs or
Low-Level RCA cables. If you are using High Level Speaker
outputs, you may need a high to low level adapter such as the
Aunex AP-SL2 adapter. For your convenience these RCA Inputs
are removeable.
Side Panel Layout Continued

10
9. Speaker Outputs: Your AMX amplier speaker outputs are
color coded as follows:
Loading your amplier below the recommended impedance
rating found on page 20 is not recommended and may cause your
amplier to enter into protection mode and may void your warranty.
Side Panel Layout Continued
AMX600.2D Wire Color Output Description Bridge Description
White (+) Positive Speaker Output White (+) Positive
White / Black (-) Negative Speaker Output
Gray (+) Positive Speaker Output
Gray / Black (-) Negative Speaker Output Gray / Black (-) Negative
AMX800.4D Wire Color Output Description Bridge Description
White (+) Positive Speaker Output White (+) Positive
White / Black (-) Negative Speaker Output
Gray (+) Positive Speaker Output
Gray / Black (-) Negative Speaker Output Gray / Black (-) Negative
Green (+) Positive Speaker Output Green (+) Positive
Green / Black (-) Negative Speaker Output
Purple (+) Positive Speaker Output
Purple / Black (-) Negative Speaker Output Purple / Black (-) Negative
AMX900.6D Wire Color Output Description Bridge Description
White (+) Positive Speaker Output White (+) Positive
White / Black (-) Negative Speaker Output
Gray (+) Positive Speaker Output
Gray / Black (-) Negative Speaker Output Gray / Black (-) Negative
Green (+) Positive Speaker Output Green (+) Positive
Green / Black (-) Negative Speaker Output
Purple (+) Positive Speaker Output
Purple / Black (-) Negative Speaker Output Purple / Black (-) Negative
Cyan (+) Positive Speaker Output Cyan (+) Positive
Cyan / Black (-) Negative Speaker Output
Magenta (+) Positive Speaker Output
Magenta / Black (-) Negative Speaker Output Magenta / Black (-) Negative
Channel 3
NA
Channel 4
Channel 5
Channel 6
NA
Channel 3
Channel 4
NA
Channel 1
NA
Channel 2
Channel 1
Channel 2
NA
Channel 1
NA
Channel 2

11
10. +12Volt Positive Wire: The +12Volt positive wire on your AMX
amplier is supplied with an 8 AWG wire. Use the supplied fuse
block and make your +12Volt connection directly to the positive
battery post. The Fuse should be installed within 18” (457mm)
of the battery. This fuse is vital to protecting the vehicle and
amplier from a dead short.
For maximum current ow, Aunex recommends that you solder
your power cable to your amplier’s power wire. In addition,
Aunex recommends using high quality 100% OFC (Oxygen Free
Cooper) or Tinned 100% OFC speaker wire. This will ensure
that your speaker / subwoofer receives maximum output from
your amplier.
11. Remote Input Wire: This remote wire must be connected to
a switched +12Volt source. If the source unit does not have a
remote Turn on lead, then a switched +12 supply should be
used such as the ACC +12Volt. Run an 18-gauge wire from the
Remote Turn-On Lead from your headunit / source unit to this
terminal.
If you are using the High-Level Speaker Outputs connection
to the ampliers’ RCA inputs, you do not need to connect
a remote input to your amplier. Your amplier will
automatically detect the speaker signal and will turn on
your amplier via its DC Oset circuit. In addition, the
remote input terminal then becomes a remote output
trigger which can be used to turn on another amplier or
processor that requires a +12volt remote connection.
Side Panel Layout Continued

12
12. Ground Wire: The ground wire on your AMX amplier is
supplied with an 8 AWG wire. Make your ground connection
directly to the chassis of the vehicle as close to the amplier
as possible. Make sure this connection is made with the same
gauge wire as used for your +12Volt connection. Ensure that all
dirt, grease and paint is removed from your chassis ground point
prior to attaching the ground wire. Aunex recommends when
making your chassis ground to use a Star Washer which
will help prevent your ground bolt from loosen. (If your AMX
Amplier is going to be used in a UTV, ATV, Golf Cart or
Motorcycle where a good chassis ground is maybe dicult
to locate, Aunex recommends connecting the ground of
your amplier directly to your battery ground.)
13. Input Mode Selector: On the AMX800.4D and AMX900.6D
this switch allows you to select the number of RCA inputs used
to send audio signal to your amplier. In 2 Channel Model, only
1 set of RCA inputs is needed to drive all 4 output channels.
(You will need to set the Input Mode switch to the 2Ch. position.)
In 4 Channel Mode, all 4 RCA inputs will be connected, and
the Input Mode switch will need to be set to the 4Ch. position.
The AMX900.6D has a 2 Channel and 6 Channel Switch. (The
AMX600.2D does not incorporate an Input Mode Selector.)
Side Panel Layout Continued

13
Power Connection
For maximum current ow, Aunex recommends that you tin your
ground wire before connecting it to the ground terminal of your
amplier. In addition, Aunex recommends using high quality 100%
OFC (Oxygen Free Copper) or Tinned 100% OFC speaker wire.
This will ensure that your speaker / subwoofer receives maximum
output from your amplier.
Connect to Source unit’s
accessory lead or
switched 12v source
Connect to either
the chassis ground
of your vehicle or
connect directly
to your negative
battery post
Keep Grounds
as short as possible
+12V Remote Ground
See Specications
for Fuse Rating
Fuse
Less
than 18”
Vehicle Battery
_
NEG
+
POS

14
Bridge
Ch.1 Ch.2
2 ohm
Minimum
2 ohm
Minimum
Full Range
Speakers
+_
+_
2 - Channel Stereo Speaker Output Connection
Side Panel Full
Switch Position
Side Panel HP
Switch Position
Common Installation Diagrams
The illustrations below show the common installation methods
for your amplier. It is important to make sure that the impedance
of the speakers connected to your amplier are either at 4-ohms
stereo, 2-ohms stereo or 4-ohms bridged. Connecting your
amplier below these impedances are not recommended as
they will cause your amplier to go into protection. If you are
unsure of the impedance, it is recommended that use a DMM
(Digital Multi-Meter) to check the impedance of your connection at
the ampliers’ Speaker Output Terminals. Your amplier will need
to be o in order to get accurate measurements.
AMX600.2D
OR

15
Common Installation Diagrams Continued
Bridge
Ch.1 Ch.2
Subwoofer
4 ohm
+_
1 - Channel (Bridged Mode) Speaker Output Connection
Side Panel LP
Switch Position
4 - Channel Speaker Output Connection
Side Panel Full
Switch Position
Side Panel HP
Switch Position
BridgeBridge
Ch.1 Ch.2Ch.3 Ch.4
Speaker Outputs
Full Range
Speakers
2 ohm
Minimum
+_
+_
Full Range
Speakers
2 ohm
Minimum
+_
+_
AMX600.2D
AMX800.4D
OR

16
Common Installation Diagrams Continued
BridgeBridge
Ch.1 Ch.2Ch.3 Ch.4
Speaker Outputs
3 - Channel Stereo/Mono Speaker Output Connection
Full Range
Speakers
2 ohm
Minimum
+
_
+
_
+
_
Subwoofer - 4 ohm
Ch.3 &Ch.4
Ch.3 &Ch.4
Side Panel
Switch Position
Ch.1 &Ch.2
Ch.1 &Ch.2
OR
2 - Channel (Bridged Mode) Speaker Output Connection
BridgeBridge
Ch.1 Ch.2Ch.3 Ch.4
Speaker Outputs
Full Range Speakers
2 ohm Minimum
Side Panel Full
Switch Position
Side Panel HP
Switch Position
+_ +_
AMX800.4D
AMX800.4D
OR

17
Common Installation Diagrams Continued
5 - Channel Speaker Output Connection
Ch. 1 & Ch. 2
BridgeBridgeBridge
Ch.1 Ch.2 Ch.3 Ch.4 Ch.5 Ch.6
Speaker Outputs
Full Range Speakers
2 ohm Minimum
Full Range Speakers
2 ohm Minimum
Full Range
Speakers
2 ohm
Minimum
Subwoofer
4 ohm
+_
+_
Side Panel HP
Switch Position
Side Panel Full
Switch Position
OR
Side Panel HP
Switch Position
Side Panel Full
Switch Position
OR
Side Panel LP
Switch Position
Ch. 3 & Ch. 4
Ch. 5 & Ch. 6
+_
+_
+_
AMX900.6D
6 - Channel Speaker Output Connection
Full Range Speakers - 2 ohm Minimum
Full Range Speakers - 2 ohm Minimum
BridgeBridgeBridge
Ch.1 Ch.2 Ch.3 Ch.4 Ch.5 Ch.6
Speaker Outputs
+_
+_
+_
+_
+_
+_
Side Panel HP
Switch Position
Side Panel Full
Switch Position
OR
Side Panel HP
Switch Position
Side Panel Full
Switch Position
OR
Side Panel HP
Switch Position
Side Panel Full
Switch Position
OR
Ch. 1 & Ch. 2
Ch. 3 & Ch. 4
Ch. 5 & Ch. 6
AMX900.6D

18
Common Installation Diagrams Continued
BridgeBridgeBridge
1.hC
2.hC
3.hC
4.hC
5.hC
6.hC
Speaker Outputs
3 - Channel Mono Speaker Output Connection
Full Range Speakers - 2 ohm Minimum
+_
+_
Subwoofer - 4 ohm
+_
Ch. 1 & Ch. 2
Side Panel HP
Switch Position
Side Panel Full
Switch Position
OR
Side Panel HP
Switch Position
Side Panel Full
Switch Position
OR
Side Panel LP
Switch Position
Ch. 3 & Ch. 4
Ch. 5 & Ch. 6
AMX900.6D
4 - Channel Stereo / Mono Speaker Output Connection
Full Range Speakers
2 ohm Minimum
BridgeBridgeBridge
Ch.1 Ch.2 Ch.3 Ch.4 Ch.5 Ch.6
Speaker Outputs
+_
+_
Side Panel HP
Switch Position
Side Panel Full
Switch Position
OR
Side Panel LP
Switch Position
Side Panel LP
Switch Position
Ch. 1 & Ch. 2
Ch. 3 & Ch. 4
Ch. 5 & Ch. 6
+_
Subwoofers
4 ohm
+_
AMX900.6D

19
Note: One of the leading causes of amplier
failure is using inferior Power, Ground and
Speaker wires that are not sucient in
quality to deliver the necessary current to keep your
amplier performing at its peak level. As all
Aunex ampliers are designed to deliver high
power output, we recommend that you do
not use any power wires that contains CCA
(Copper Clad Aluminum). Instead we recommend
only using high quality 100% OFC (Oxygen Free
Copper) or 100% Tinned OFC (Oxygen Free
Copper) wires. This will help give your
amplier the proper current and will ensure
that your amplier will perform at this peak
perform level for many years to come.
Ask your Authorized Aunex Dealer or visit
www.aunexusa.com to view the complete line of
installation accessory that will compliment
your audio investment. Aunex provides a wide
election from RCA cables and power wire
to speaker wire and battery connectors.