Aunex AC 5 Series User manual

AC Series 5 & 6 Channel Amplier
Compact Full Range Class D Amplier Series
Model: AC1100.5D, AC1500.6D
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.
AC1500.6D

1
Congratulations and thank you for purchasing an Aunex AC 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 Amplier 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
Feature Set of the AC Series 5 & 6 Channel Ampliers
• Heavy Density Aluminum Extruded Heatsink
• 4 Layer PCB, SMD Technology
• Conformal Coated PCB
• Dierential Balanced RCA Inputs
• Output Clipping Indicators
• AC1100.5D Filters
o Variable High Pass Crossover 12dB/Octave (Ch. 1 – Ch.
4)
o Variable Low Pass Crossover 24dB/Octave (Ch. 5 Sub
woofer)
o Boost Eq. 0 – 18dB @ 45Hz Center (Ch. 5 Subwoofer)
o Infrasonic Filter 10Hz – 50Hz @ 24dB/Octave (Ch. 5
Subwoofer)
o Input Mode Selector (2Ch. or 5 Ch.)
• AC1500.6D Filters
o Variable High Pass Crossover 12dB/Octave (Ch. 1 – Ch.
6)
o Variable Low Pass Crossover 12dB/Octave (Ch. 1 –
Ch.6)
o Input Mode Selector (2Ch. or 6 Ch.)
• 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
• Blue Illuminated Power Input and Speaker Output Terminals
• 4 Gauge Power & Ground Terminals
• 8 Gauge Speaker Output Terminals
• Advance Protection Circuit Monitoring: Short, Thermal, Over
load and Impedance
• Finish: Anodized with Texture Paint

3
What’s Included
• (1) AC Series Multi Channel Amplier
• (1) Remote Level Controller, Cable and Wing Adapter
(AC1500.6D Only)
• (1) In-Line Fuse Holder with Mini ANL Fuse
o AC1100.5D is supplied with a 100A Fuse
o AC1500.6D is supplied with a 120A Fuse
• (6) Self Tapping Screws and (4) for Amplier, (2) for Remote
• (2) Allen Wrenches
• (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.
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.

4
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.
Important Installation Precautions Continued
• 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
Side Panel Layout
1
10 11 12 13
2
5 5
4 46 6
59874
3
1
10 11 12 13
25
5
46A
6A 6B
6A 54 4
6B
6B
AC1100.5D
AC1500.6D

6
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. Channels 1 - 4 are your Front
and Rear Inputs. Channel 5 is your Subwoofer Inputs on the
AC1100.5D. The AC1500.6D has 3 pairs of RCA’s inputs
corresponding to Channels 1 - 6. Your AC 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 Mode Selector: 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 5 output channels. (You will need to set the
Input Mode switch to the 2Ch. position.) In 5 Channel Mode,
all 6 RCA inputs will be connected, and the Input Mode switch
will need to be set to the 5Ch. position. For the AC1500.6D the
Input Mode switch is selectable at either 2 Channel Input or 6
Channel Input mode.
3. Remote Level Control (AC1100.5D Only): With the Remote
Level Control plugged to your amplier, you can now adjust
the amount of output from your subwoofer (Channel 5) 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.
Side Panel Layout Continued
12

7
4. 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.
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 amplifier 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 amplifier and may cause
excessive heat building and possibly product failure.
6. High Pass Filter Frequency Filter (AC1100.5D Only): These
potentiometers allow you to adjust the crossover frequency of
Channels 1 - 4 from 40Hz – 400Hz.
6A. Crossover Filter Selector (AC1500.6D Only): Depending
on how you will use your AC Amplier, you will select the appropriate
setting on the Crossover switch. Set the Crossover Switch to
LP (Low Pass) mode if you are using Subwoofers or MidBass
drivers. Set the switch to HP (High Pass) 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, this 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.
6B. Filter Frequency (AC1500.6D Only): This potentiometer
will be active when setting your amplier in either High Pass
(HP) or Low Pass (LP) Mode and allows you to adjust the
crossover frequency from 40Hz – 400Hz.
Side Panel Layout Continued

8
Side Panel Layout Continued
7. Low Pass (LP) Filter Frequency Filter (AC1100.5D Only):
This potentiometer allows you to adjust the crossover frequency
of your Subwoofer Channel from 50Hz – 250Hz.
8. Infrasonic Filter (AC1100.5D Only): 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 speaker’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.
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. (AC1100.5D Only)
9. Boost Eq (AC1100.5D Only): Your AC Series amplier
incorporates a Boost Eq. circuit on the Subwoofer Channel that
can increase output 0 - 18dB centered at 45Hz. 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.
10. Speaker Outputs: Your AC amplier speaker outputs are
designed to accept 16 AWG to 8 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.
Loading your amplier below the recommended
impedance rating found on page 16 is not recommended and
may cause your amplier to enter into protection mode and
may void your warranty.

9
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 Cooper) or Tinned 100%
OFC speaker wire. This will ensure that your speaker /
subwoofer receives maximum output from your amplifier.
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.
11. +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 Cooper) or Tinned 100% OFC speaker wire.
This will ensure that your speaker / subwoofer receives
maximum output from your amplier.
12. 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.
Side Panel Layout Continued

10
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.
13. 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.
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 Cooper) or Tinned 100% OFC speaker wire.
This will ensure that your speaker / subwoofer receives maximum
output from your amplier.
Side Panel Layout Continued
Power Connection
Connect to Source unit’s
accessory lead or
switched 12v source
Connect to
chassis ground
of vehicle. Keep
Grounds as short
as possible
See Specifications
for Fuse Rating
Fuse
Less
than 18”
Vehicle Battery
_
NEG
+
POS

11
Common Installation Diagrams
AC1100.5D
The illustrations below shows the common installation methods
for your AC1100.5D. It is important to make sure that the
impedance of your speakers connected to your amplier are either
in 4-ohms Stereo, 2-ohms Stereo or 4-mono Bridged for Channels 1
- 4. The Subwoofer Channel should be loaded at 2-ohms or higher.
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.
5 Channel Speaker Connection
+_+_2 ohm
Minimum
2 ohm
Minimum
Full Range
Speakers
+_+_
2 ohm
Minimum
2 ohm
Minimum
Full Range
Speakers
Subwoofer
2 ohm Minimum
+_

12
Common Installation Diagrams Continued
+_
4 ohm
Minimum Full Range
Speakers
+_
Subwoofer
2 ohm Minimum
+_
4 ohm
Minimum Full Range
Speakers
3 Channel Speaker Connection

13
Common Installation Diagrams Continued
AC1500.6D
The illustrations below show the common installation methods
for your AC1500.6D. It is important to make sure that the
impedance of your speakers connected to your amplier are either in
4-ohms Stereo, 2-ohms Stereo or 4-mono Bridged for Channels 1 - 6.
Connecting your amplier below these impedances is 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.
+_+_
Full Range Speakers
2 ohm Minimum
Full Range Speakers
2 ohm Minimum
6 - Channel Speaker Output Connection
+_
+_+_+_
Side Panel
Switch Position
OR

14
Common Installation Diagrams Continued
Subwoofer
4 ohm Minimum
5 - Channel Stereo/ Mono Speaker Output Connection
+_
Side Panel
Switch Position
OR
+_+_
Full Range Speakers
2 ohm Minimum
Full Range Speakers
2 ohm Minimum
+_+_

15
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
selection from RCA cables and power wire
to speaker wire and battery connectors.

16
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.
*This manual is the exclusive property of Aunex, Inc. Any reproduction of this
manual or use other than its intended purposes is strictly prohibited without
the express written consent of Aunex, Inc. ©Copyright 2020 Aunex, Inc.

17
Troubleshooting
Problem Solution
1. Check to see if Power, Remote and Ground is
connected to the Amplifier.
2. Check Power and Remote Turn-on lead for proper
+12 Voltage. (12 - 16 Volts DC acceptable range.)
3. Check the inline fuse, replace if necessary.
1. Check your RCA connectors to see if there is signal
with a DMM (Digital Multi-Meter) to measure AC
voltage.
2. Check your speakers to see if there is short.
1. Readjust your amplifiers gains to lower setting.
2. Readjust your source unit volume.
3. Make sure your RCA's and Speaker wires are routed
away from your Power and Ground connections.
4. Remove existing ground wires for all electrical
components. Reground wires to a different location.
Verify the grounding location is clean, paint from ground
point has been removed and is rust free.
5. Add a secondary ground cable from the negative
battery terminal to the chassis metal or engine block of
vehicle.
6. Check your RCA cables or speaker input for any
damage.
1. Readjust your amplifiers gains to a lower setting.
2. Readjust your source unit volume.
3. Readjust the Boost Eq.
1. Amplifier may be in thermal protection due to heat.
2. Check the inline fuse, replace if necessary.
3. Check the voltage at the amplifier power input
terminals.
Logo Status LED is Red /
Protection Circuit Active
Amplifier does not work; no
LED's on
Amplifier powers up; no sound
Distorted sound from speakers
Hissing / Enginer noise from
speakers

18
California’s Proposition 65 (Prop 65) entitles consumers in
California to special warnings for products that contain
chemicals knows to the state of California to cause cancer,
birth defects or other reproducttive harm if consumers are
exposed to such chemicals above certain threshold levels.
While this law is only for California and Aunex sells products to
consumers in California, Aunex is required to display this warning.
California Prop 65 Warning
Warning: This product can expose you to
chemicals which are known to the State of
California to cause cancer or birth defects
or other reproductive harm. For more
information visit www.p65warnings.ca.gov.
Limited Warranty – AC Series Ampliers
Aunex, Inc. warrants this product to be free of defects in
materials and workmanship for a period of 1 year from the original
purchase date. This warranty is non-transferrable and applies only
to the original purchaser from an Authorized Aunex Dealer. (Any
Factory Refurbished Amplier (B-Stock Products)
carries a 90 Day warranty period.) Should service be necessary
within the warranty period, Aunex will at its discretion repair or
replace the defective unit with a new or remanufactured
product at no charge. Damage caused by misuse, abuse,
accidental damage, product modication, failure to follow instal
ation instructions, unauthorized repairs will not be covered
under warranty. This warranty does not cover incidental or
consequential damages and does not cover the cost of having the unit
removed or reinstalled. Cosmetic damages by accident or
normal wear and tear are not covered under warranty.
Subsequent damage to a other component will not be covered.
Warranty

19
Warranty will be voided if the product’s serial number has been
removed or defaced. Any applicable implied warranties are
limited in duration to a period of the express warranty as
provided in this manual beginning with the date of the original
purchase and no warranties whether express or implied shall apply to
this product thereafter. Some states do not allow limitation on implied
warranties; therefore, these exclusions may not apply to you.
This warranty gives you specic legal rights; however, you
may have other rights that vary from state to state.
All warranty returns should be sent to Aunex freight prepaid
and must be accompanied by proof of purchase; a copy of the
purchase sales receipt. All returns whether sent by the Dealer of
purchase or directly from the consumers must have a valid RMA
number (Return Merchandise Authorization). Returns without a
valid RMA number will be refused. The RMA number must
be clearly written on the outside of your return package.
Non-defective units will be returned to sender freight collect.
Customers are responsible for shipping charges and insurance
in sending products back to Aunex. Freight damage on returns is
not covered under warranty so be sure to package your return in
the original box or packaged securely in another box to prevent
possible freight damage. Warranty expiration on items without proof
of purchase will be determined from the manufacturing date code.
Products purchased outside of the United States of America
are covered by that country’s distributor and not by Aunex, Inc. For
Service Information in the U.S.A. and to obtain a Return Merchandise
Authorization number (RMA) please call Aunex at [phone].
Warranty Continued