COMPACT HIGH POWER ALL-WEATHER MONO AMPLIFIER
Quick Start Guide
Features
• Compact High Power Mono Subwoofer Amplier
• High Current Design
• 1 x 300 Watts @ 2 Ohms, 1x175 watts @ 4 Ohm
• 12 dB/Octave Linkwitz-Riley Alignment Crossover
• GTO™ Signal Sense (Great Turn On)
• 2 RCA Inputs - switchable for Low and High Level signals
• Optional wired ACR-1 Remote Control for Output Level
• All-weather rated - IPX6 rated!
• Cage-free op-amps
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GND
+12V
OUTPUT
INPUT 1
INPUT 2
ACX-300.1
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Quick Start Guide
ACX-300.1
Important Safety Instructions
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install in accordance with the
manufacturer’s instructions.
8. Do not install near any heat sources such as muers, silencers, exhaust
pipes, or other apparatus (including ampliers) that produce heat.
9. WARNING: Improper installation may lead to permanent injury or death.
Installation of the apparatus must be done with great care by qualied
personnel, to prevent damage to fuel lines, power and other electrical
wiring, hydraulic brake lines, and other systems, that might compromise
vehicle safety.
10. Provide +12V and Ground wiring of sucient size to ensure adequate
current to the amplier. For the ACX-300.4 this means 8 gauge wire or
thicker.
11. Use rubber grommets to protect wiring whenever passing wires through
metal openings or bulkheads.
12. Only use attachments/accessories specied by the manufacturer.
13. Refer all servicing to qualied service personnel. Servicing is required
when the apparatus has been damaged in any way, such as the power
input terminals are damaged or objects have fallen into the apparatus,
does not operate normally, or has been dropped.
14. Fuses shall be replaced only with the correct type and fuse value, and
only when the apparatus is powered o.
15. Exposure to high sound pressure levels may lead to permanent hearing
loss. Take every precaution to protect your hearing.
The lightning ash with arrowhead symbol within an equilateral triangle
is intended to alert the user to the presence of uninsulated
“dangerous voltage” within the product’s enclosure, that may be
of sucient magnitude to constitute a risk of electric shock to
persons.
The exclamation point within an equilateral triangle is intended to alert the
user of the presence of important operating and maintenance
(servicing) instructions in the literature accompanying the
appliance.
Caution: to reduce the risk of electric shock, do
not disassemble the apparatus, other than to
remove the top panel to access the controls.
There are no user-serviceable parts inside.
Refer servicing to qualied personnel.
Recycling notice: If the time comes and this apparatus has fullled its destiny,
do not throw it out into the trash. It has to be carefully recy-
cled for the good of mankind, by a facility specially equipped
for the safe recycling of electronic apparatii. Please contact
your local or state recycling leaders for assistance in locating a
suitable nearby recycling facility. Or, contact us and we might
be able to repair it for you.
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1. Speaker Output – Connect these wires to your subwoofer using
the included water resistant harness. Speaker wire may then be
crimped or soldered onto the bare leads. Use a decent sized wire
gauge as this baby is powerful!
2. Power Input Terminal +12V & Ground – Connect these wires
to the +12V and Negative binding posts of the vehicle battery
via one of two included harness options. You may use either the
included water resistant harness, or the included harness kit to
terminate your own custom-length water-resistant harness. Use
quality insulated wiring of the recommended wire gauge, such as
wire gauge 8 or thicker.
3. Remote Power Input Wire – This wire connects to the 12V remote
trigger output of some head units and controls the on/o state of
the amplier. Alternatively, you can use the GTO™ feature of the
amplier so it will turn on when an speaker level signal is detected
at the RCA inputs.
4. Power LED - When the unit has been powered on, the LED will
glow warmly red
5. Input Level - Use this switch to specify which type of signal input
voltage type you are using - high is speaker level & low is RCA line
level.
Connection Features
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+12V
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INPUT 1
INPUT 2
1 2 3 4 5 6 7 8 9 10 11 12 13
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Quick Start Guide
ACX-300.1
6. Protection LED – This LED will shine if there is a problem being
sensed by the unit. See troubleshooting section for best practice
to determine the cause of the issue.
7. Gain Control - This controls allows you to adjust the overall
output level, with counterclockwise decreasing the level and
clockwise increasing. Adjust this knob to the point where the
Maximized light shines briey. This will be your optimal gain
setting.
8. Low Pass Crossover – Since component speakers (like woofers)
are designed to reproduce certain frequency ranges, a crossover
allows you to match the speaker to the appropriate frequency
range. Choosing the correct crossover point based on the man-
ufacturer’s specication will provide increased speaker reliability
and optimum sound quality. The ACX-300.1 amplier has select-
able 12 dB/Octave Linkwitz-Riley crossover points at 80 Hz, 120
Hz, and a “bypass” option. The amplier reproduces the frequency
range below the crossover point. Select the crossover frequency
on the ACX-300.1 amplier to best match the value specied by
your loudspeaker’s manufacturer.
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GND
+12V
OUTPUT
INPUT 1
INPUT 2
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Control Panel Features
9. Gain Maximized LED - This LED indicates when the ACX-300.1
amplier gain has been maximized for optimum performance.
10. AccuBASS® - This switch enables the renowned AccuBASS® bass
enhancement to work it’s magic on the lower bass of speaker
outputs.
11. AccuBASS® Threshold – Sets the level at which AccuBASS® will
begin to work.
12. AccuBASS® Level - Adjusts the level of the AccuBASS® enhance-
ment circuitry.
13. GTO ™ Signal Sense – In the ON position, the ACX-300.1 amplier
will turn on gracefully when it detects an incoming audio signal,
and it will turn o after a period of time when the audio signal
fades away to silence. In some situations, factory installed audio
systems may turn on or “wake up” due to convenience features
like door chimes, alarms, and cell phone signals that trigger the
source unit in the vehicle to come on. To prevent these from
turning your audio system on unexpectedly, you can bypass
the GTO™ circuit by moving the switch to the OFF position and
use a switched 12-volt signal connected to the Remote In wire
instead.
14. RCA Inputs – This is where you connect your source signal to. If
using low level signals, make sure your Input Level setting switch
is set to Low. If you are using high or speaker level signals, set your
Input Level to High.
15. Remote Level Port - Using the cable that came with the ACX-
300.1, connect your optional ACR-1 level control knob here.
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Quick Start
Here are a few general steps to get your ACX-300.1 amplier up and
running:
1. Undo the +12V and Ground connections to the battery before
making any connections to the amplier.
2. Pick a mounting location that will provide access to the controls
and connections, provide plenty of good ventilation, and also
protect the amplier from heat, moisture, and dirt.
3. The ACX-300.1 amplier needs to be securely mounted using the
four mounting holes located in each corner.
4. Before drilling any holes, take every precaution to prevent
any damage to fuel lines, power and other electrical wiring,
hydraulic brake lines, and other systems, that might compromise
vehicle safety.
5. When making connections, designate red RCA plugs as right,
and designate white, black, or gray plugs as left. This is a good
idea for consistency.
6. Use quality interconnect cables.
7. Connect the +12V input wire on the included wiring harness
assembly to the +12V terminal of the vehicle battery, using the
appropriate gauge wire
8. Connect the Ground wire of the included wiring harness assem-
bly to a ground source such as the negative battery terminal,
vehicle chassis, or other ground source, using the same wire
gauge as the +12V power wire.
9. Connect the remote power wire of the unit to the remote turn-
on switch of your source unit. Alternatively, you can skip this
connection and use the GTO™ Signal Sensing.
10. Connect your audio inputs to the unit – either speaker-level or
line-level RCA… not both.
11. Connect your loudspeakers (minimum impedance of 2 Ohms).
12. When all connections are made, reconnect the vehicle battery.
13. Adjust your gain setting to maximize your signal level.
14. Set the ACX-300.1 crossover to the frequency recommended by
the loudspeaker manufacturer.
15. Enjoy the ride!
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Quick Start Guide
ACX-300.1
Power Connections
In this example, the head unit has a +12V trigger
output that is connected to the ACX-300.1 remote
input terminal. When the head unit is turned on, it
will turn on the ACX-300.1amplier.
Alternatively, the GTO™ Signal Sense feature can
be used to gently turn on the ACX-300.1 amplier
when an audio input signal is detected. (The con-
nection to the ACX-300.1 remote input terminal is
not required when using the GTO™ signal sense.)
Source Unit
Speaker-level output
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+12V
OUTPUT
INPUT 1
INPUT 2
12V Trigger
To battery
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System #1: Using Speaker-Level Inputs
Source
Unit
Speaker-level output
ACR-1
Subwoofer
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GND
+12V
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INPUT 1
INPUT 2
GND
+12V
To battery
12V Trigger
Speaker Level Wires
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Cover Plate Removal
The cover plate must be removed to gain access to
the controls, and then sealed again to protect the
controls against moisture and debris.
Removal Procedure
1. Locate the top six hex screws that hold down
the sealed top cover.
2. Use a 2.5mm hex wrench to remove the six
screws.
3. Gently lift cover o. It’s a very tight t there, so
you may need to use some gentle force. Yes, it is
with you!
4. Keep the cover plate and screws in a safe and
handy place, until you have nished adjusting
the controls to your immense satisfaction.
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+12V
OUTPUT
INPUT 1
INPUT 2
ACX-300.1
Quick Start Guide PN 915-022-0 Rev A
Specications
All specications are measured at 14.4 VDC (standard automotive voltage). As technology advances, AudioControl reserves the right to continuously
change our specications, like our Pacic Northwest weather, although we are working on changing that as well.
The ACX-300.1 Amplier
Power Output (RMS) ..........................1x175 Watts @ 4 Ohms
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1x300 Watts @ 2 Ohms
Frequency Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Hz - 22 kHz
Total Harmonic Distortion + N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 0.05%
S/N Ratio ..........................102 dBa, Ref 175 Watts @ 4 Ohms
Power / Ground Wire Gauge ...................Between 8 and 4 AWG
Crossover. . . . . . . . . .12dB/Octave Linkwitz-Riley, 80 Hz, 120 Hz, Bypass
Line/Speaker-Level Inputs . . . . . . . . . . . . . . . . . . 500mV - 6V/1V - 12VRMS
Weight .......................................................7.2 lbs
Dimensions ........................... 9.875" W X 3.875" D X 2.125" H
©2020 AudioControl. All rights reserved.
AudioControl
22410 70th Avenue West, Mountlake Terrace, WA 98043 USA,
Phone 425-775-8461, FAX 425-778-3166
email: sound.great@audiocontrol.com
Warranty
For details of the limited warranty for your ACX-300.1 please visit
the following page on our website: audiocontrol.com/warranty
Please keep your receipt in a safe place.
