Aunex AM Series User manual

AM Series Ampliers
Mini Class D Digital Amplier Series
Models: AM500.2D, AM700.4D, AM800.1D
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.

1
Congratulations and thank you for purchasing an Aunex AM 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 AM Series Ampliers
• Heavy Density Aluminum Extruded Heatsink
• 4 Layer PCB, SMD Technology
• Conformal Coated PCB
• Dierential Balanced RCA Inputs
• 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
• 4 Gauge Power & Ground Terminals
• 12 Gauge Speaker Output Terminals
• Advance Protection Circuit Monitoring: Short, Thermal,
Overload and Impedance
• Finish: Anodized with Brush Finish
AM500.2D Feature Specic
• Fully Variable Crossover 12dB/Octave Slope
• Dual Boost Circuitry Active in HP and LP Modes 0 – 18dB
AM700.4D Feature Specic
• Fully Variable Crossover 12dB/Octave Slope
• Input Mode Selector (2Ch. or 4 Ch.)
AM800.1D Feature Specic
• Fully Variable Crossover 24dB/Octave
• Fully Variable Infrasonic Filter 10Hz – 50Hz @ 24dB/Octave
• Power Optimization Circuit to Regulate Output into 2 Ohms
• Boost Eq. 0 – 18dB @ 45Hz Center
• Remote Level Controller

3
What’s Included
• (1) AM Series Mini Amplier
• (1) In-Line Fuse Holder with Mini ANL Fuse
o AM500.2D is supplied with a 50A Fuse
o AM700.4D is supplied with a 60A Fuse
o AM800.1D is supplied with a 80A Fuse
• (4) Self Tapping Screws and (4) Washers
o (AM500.2D & AM700.4D)
• (6) Self Tapping Screws; (4) for Amplier, (2) for Remote
o (AM800.1D)
• (1) Remote Level Controller, Cable and Wing Adapter
o (AM800.1D)
• (2) Allen Wrenches
• (1) Instruction Manual
• (1) Sticker
Important Safety Considerations
• To prevent personal injury and damage to the unit, please read
the following 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 AC 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. However prolonged exposure to
water and high humidity may damage internal components in
time. 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.
Side Panel Layout
1
7
2
8
3
9
4
10
5 6
AM500.2D

6
Side Panel Layout Continued
2 2
3 34 4
6
11
6
1 1
AM700.4D
7 8 9 10

7
AM800.1D
Side Panel Layout Continued
1 2 4 5 612 13
7 8 9 10

8
1. 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 AM 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.
2. 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.
3. Crossover Filter Selector: Depending on how you will use
your AM 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.
4. 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). (The AM800.1D has a LP
/ Low Pass Crossover that is variable from 50Hz - 250Hz.)
Side Panel Layout Continued

9
5. Boost Eq: The AM500.2D 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 AM800.1D Boost Eq. circuit can increase output
0-18dB centered at 45Hz. The AM700.4D does 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.
6. 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.
7. Speaker Outputs: Your AM amplier speaker outputs are
designed to accept 16 AWG to 12 AWG wire. Turn the set
screws on this terminal counterclockwise to loosen the screw
using the supplied Hex wrench. Strip the PVC jacket from
your speaker wire ½ inch (12mm). Then insert the bare wire
into the terminal block so that no bare speaker wire is
exposed. Then tighten the set screw by turning it clockwise.
Side Panel Layout Continued

10
For maximum current ow, Aunex recommends that you tin
your speaker wire before connecting it to the speaker output
terminals. 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. Visit
www.aunexusa.com or talk to your Authorized Aunex
Dealer to see a complete selection of premium installation
accessory that will complement and enhance listening
experience.
Loading your amplier below the recommended impedance
rating found on page 19 is not recommended and may cause
your amplier to enter into protection mode and may void your
warranty.
8. +12Volt Positive Terminal: The +12Volt positive terminal is
designed to accept up to 4 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. Turn the set screws on this terminal
counterclockwise to loosen the screw using the supplied Hex
wrench. Strip the PVC jacket from your speaker wire ½ inch
(12mm). Then insert the bare wire into the terminal block so that
no bare power wire is exposed. Then tighten the set screw by
turning it clockwise.
For maximum current ow, Aunex recommends that you tin
your power wire before connecting it to the +12Volt terminal. 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.
Side Panel Layout Continued

11
9. Remote Input Terminal: This terminal 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.
10. Ground: The Ground terminal is designed to accept up to 4
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 loosening. (If your AM 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.)
11. Input Mode Selector: On the AM700.4D 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 AM500.2D and
AM800.1D does not incorporate an Input Mode Selector.)
Side Panel Layout Continued

12
12. Infrasonic Filter: This variable potentiometer will provide a roll
o point for lower frequencies (10Hz – 50Hz variable) that could
potentially damage your subwoofers from over-excursion. The
frequency setting for your Infrasonic Filter is to be set relative
to your subwoofer’s low-frequency capabilities along with
enclosure tuning. In a sealed box Aunex recommends
setting the Infrasonic Filter between 25Hz – 35Hz. In a ported
enclosure Aunex recommends setting the Infrasonic lter at ½
an Octave below your tuned frequency. (The AM500.2D and
AM700.4D does not incorporate the Infrasonic Filter.)
For example, let say your ported enclosure is tuned at 40Hz.
Take ½ of 40Hz which is 20Hz (this is one octave lower). Now
take another half o 20Hz which is then 10Hz (this is half an
octave lower). Now take 10Hz from 40Hz which is 30Hz and
where you should set your Infrasonic Filter.
13. Remote Level Control: With the Remote Level Control plugged
to your amplier, you can now adjust the amount of output from
the convenience of this controller. There are several mounting
options for your controller. With the supplied wing attachment,
you can mount the controller under your dash. Should you want
to mount the controller ush to your dash, arm rest or any other
panel of your vehicle the wing attachment will more than likely
not be needed. (The AM500.2D and AM700.4D does not
incorporate the Remote Level Controller.)
Side Panel Layout Continued
12

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
See Specications
for Fuse Rating
Fuse
Less
than 18”
Vehicle Battery
_
NEG
+
POS

14
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 in 4-ohm
stereo, 2-ohm stereo or 4-channel bridged on the AM500.2D and
AM700.4D. For AM800.1D make sure the impedance of your
subwoofer is not below 1 ohm. 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
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
AM500.2D
OR

15
4 - Channel Speaker Output Connection
Side Panel Full
Switch Position
Side Panel HP
Switch Position
Full Range
Speakers
2 ohm
Minimum
Full Range
Speakers
2 ohm
Minimum
+_ +_ +_ +_
Subwoofer
4 ohm
+_
1 - Channel (Bridged Mode) Speaker Output Connection
Side Panel LP
Switch Position
Common Installation Diagrams Continued
AM700.4D
AM500.2D
OR

16
Full Range
Speakers
2 ohm
Minimum
3 - Channel Stereo/Mono Speaker Output Connection
Side Panel
Switch Position
Side Panel
Switch Position
+_
+_
+_
Subwoofer
4 ohm
2 - Channel (Bridged Mode) Speaker Output Connection
Subwoofer
4 ohm Minimum
Side Panel
Switch Position
+_ +_
Common Installation Diagrams Continued
AM700.4D
AM700.4D
OR

17
Common Installation Diagrams Continued
AM800.1D
AM800.1D
1. A Single Voice Coil Subwoofer Speaker
1-OHM
Subwoofer
(min)
+_
2-4 ohm
Subwoofer
2. Two Single Voice Coil Subwoofer Speakers
(Note: Don’t connect speaker impediance under 1 ohm)
+_+_

18
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.

19
Technical Specications
*Due to continuous product improvements; specications and features are
subject to change without notice. Please visit www.aunexusa.com for the
most current information.
Specifications AM500.2D AM700.4D
Channels 2 4
Rated RMS Power 4 Ohms Stereo @ 14.4 Volts 150 Watts x 2 100 Watts x 4
Rated RMS Power 2 Ohms Stereo @ 14.4 Volts 250 Watts x 4 175 Watts x 4
Rated RMS Power 4 Ohm Bridged @ 14.4 Volts 500 Watts x 1 350 Watts x 2
Peak Music Power 1000 Watts 1400 Watts
Frequency Response 10Hz – 40kHz 10Hz – 40kHz
THD + Noise < 0.4% < 0.4%
S/N Ratio A-Weighted > 97dB > 103dB
Input Sensitivity (Auto Detect High / Low Level) 250mV – 10V 250mV – 10V
Crossover High Pass (12dB/Octave) 40Hz – 400Hz 40Hz – 400Hz
Boost EQ High Pass - 12kHzHz Centered 0 – 18dB NA
Crossover High Pass (12dB/Octave) 40Hz – 400Hz 40Hz – 400Hz
Boost EQ Low Pass - 45Hz Centered 0 – 18dB NA
Efficiency @ 4 Ohm 90% 84%
Operating Voltage 9 – 17 Volts 9 – 17 Volts
Fuse Requirement 50A (Included) 60A (Included)
Dimensions (H x W x D) Inches 1.6 x 9.1 x 4.3 1.6 x 9.8 x 4.3
Dimensions (H x W x D) MM 41 x 231 x 108 41 X 249 X 108
Specifications AM800.1D
Channels 1
Rated RMS Power 4 Ohms Mono @ 14.4 Volts 400 Watts x 1
Rated RMS Power 2 Ohms Mono @ 14.4 Volts 800 Watts x 1
Rated RMS Power 1 Ohm Mono @ 14.4 Volts 800 Watts x 1
Peak Music Power 1600 Watts
Frequency Response 10Hz – 250Hz
THD + Noise < 1.0%
S/N Ratio A-Weighted > 107dB
Input Sensitivity (Auto Detect High / Low Level) 250mV – 10V
Crossover Low Pass (24dB/Octave) 50Hz – 250Hz
Boost EQ Low Pass - 45Hz Centered 0 – 18dB
Infrasonic Filter 10Hz – 50Hz
Phase - Fully Variable
0 - 180⁰
Efficiency @ 4 Ohm 85%
Operating Voltage 9 – 17 Volts
Fuse Requirement 80A (Included)
Dimensions (H x W x D) Inches 1.6 x 10.7 x 4.3
Dimensions (H x W x D) MM 41 x 271 x 108