AccuBASS™ Controls: The threshold and level controls let
you determine when the AccuBASS™ circuit activates and the
level of bass correction desired. More info on page 8.
Ground: Connect to a good, veried chassis ground. Warn-
ing: factory radio ground wires already have multiple devices con-
nected to them and are not recommended.
+12V Power: Connect to a good source of 12-volt power.
Make sure you install the proper size fuse on the power wire near
the power source (i.e. battery) so that the power wire is protected
in case of a short to ground or an installation mishap.
Six Channel Line Output Converter with AccuBASS™ for
interfacing with factory installed audio systems
The LC7i transforms your under-performing factory audio sys-
tem into a supreme audio machine! It is a compact, six-channel,
high-performance active line output converter with AudioControl’s
patent-pending AccuBASS™ compensation that corrects the bass
roll-off present in many factory equipped audio systems. The LC7i
accepts up to six channels of speaker-level signal from factory-
installed ampliers or a source unit and converts it to a high-
quality, after market low-noise, pre-amp level signal that can be
fed to ampliers and speakers. You may also add an optional
ACR-1, remote level control, so you can adjust the output of the
bass channels from the convenience of the driver’s seat. With the
LC7i you have a high performance audio system while maintaining
the features, functions and
aesthetics of your factory
source unit!
This manual covers the
features, functions, instal-
lation and usage of the
LC7i so please take a few
moments to read through
it. If it’s easier, read 140
characters at a time, just
make sure to remember
where you stopped reading last time! We’ve
tried to cover all possible situations and have included lots of facts
and useful information. For more information visit our web site at
http://www.audiocontrol.com
Making Good Sound Great
®
Key features of the LC7i
•
AccuBASS™ bass compensation corrects the bass roll-off in factory
•
systems
• Speaker-level inputs can accept 400 watts per channel
• Six input and output channels!
• Internal channel summing eliminates factory crossover settings
• AutoMode turns 2 inputs into 3 outputs
• GTO™ - signal sensing turns the LC7i on automatically
•
12 volt 1 amp remote output to power up processors and ampliers
• Level matching controls
• Compact chassis for easy installation
• Recyclable cardboard box for easy storage or emergency
• heating needs
• Optional dash control (ACR-1) for remote level adjustment
• Bulletproof 5-year warranty (when installed
by an authorized AudioControl dealer)
Quick Install Guide
Since some of you high energy enthusiasts will want to install
your LC7i on your own, we offer a few reminders in the following
short section to speed up your installation. You should also refer to
diagrams on page 9 as guidelines.
1. Physically mount the LC7i in a location that keeps it away
from soda spills, food crumbs, and curious ngers. Select a loca-
tion that allows you access to the top panel controls.
2. The LC7i needs to be installed in the signal path between
your factory source unit (or factory amplier) and after-market
amplier(s) and/or processor(s). Do not connect the LC7i between
the factory head unit and the factory amplier. Locate the ampli-
ed speaker wires that are coming from your factory source unit
page 1 page 2 page 3
22410 70th Avenue West
Seattle, WA 98043 USA
Phone 425-775-8461 • Fax 425-778-3166
www.audiocontrol.com
®
and/or amplier and connect them to the speaker-level inputs on
your LC7i. In many cases you can nd factory speaker leads in the
rear of the vehicle or at the factory amplier.
Note: If your source unit has front, rear, and subwoofer speaker-
level outputs, connect them to the three sets of inputs on your LC7i.
If the source unit only has front and rear outputs, the AutoMode
circuitry in your LC7i automatically routes the Channel 2 input
signal to the Channel 3 (subwoofer) input.
3. Use RCA cables to connect the RCA outputs of the LC7i to
your aftermarket amplier(s). If the use of these connections are
not familiar to you, quickly pack up your LC7i and run to your
nearest authorized AudioControl dealer to have them perform the
installation. You will thank us later.
4. Connect +12V power and ground. Note: The LC7i does have a
12-volt remote input but in most systems the GTO™ circuit turns
the LC7i on automatically.
5. Connect the 12-volt remote output of the LC7i to your ampli-
ers remote input.
6. Turn your amp gains fully down before turning on the system.
7. Turn on the system and level match your LC7i to your source
unit, signal processor and ampliers. For more help on level
matching see our technical videos at http://www.audiocontrol.com
8. If your authorized AudioControl dealer installs your LC7i,
we will extend the normal one-year warranty to a full ve years.
AudioControl products are, by nature, more technical than many
others and we spend a good deal of time training our dealers and
installers so we know our products will be installed correctly.
We do this so you will get the best possible results from your
AudioControl purchases.
Remote In: In some installations, you may not want to use
the GTO™ to turn on your system. For these cases the LC7i can
be turned on remotely with a +12-volt trigger. When you use the
+12-volt remote in, you should set the internal GTO™ jumper (see
“Under the Hood” on page 6) to “Defeat”. This will prevent the
car’s network system from turning the system on unexpectedly.
Remote Out: Supplies 12 volts “+” when the LC7i is pow-
ered up, and is used to turn on external devices like signal proces-
sors and ampliers. Recommend fusing at 1 amp.
Maximized Indicator: This brightly colored LED indicates
when the signal level is just below clipping within your LC7i.
When properly level matched, this LED should icker occasionally
when your system is playing at its maximum volume level.
Power: If you have connected all of your power wires cor-
rectly, this light should be bright red when your system turns on.
Optional (ACR-1) Dash Mounted Control Input: You can
add a dash control that allows you to set remotely the level of the
subwoofer.
Pre-Amp Outputs: These RCA plugs should be connected to
the next component after the LC7i, such as a crossover or ampli-
er. Do not connect any speakers directly to your LC7i outputs.
Output Levels: These knobs allow you to adjust the signal
level from your source unit to match the input of your after-market
ampliers. Ideally you want to keep the output of the LC7i high
and keep the amplier gain(s) as low as possible.
Channel Summed Indicators: Under the cover of your LC7i
are jumpers that will allow you to sum selected channels into the
main (#1) channels. This is especially useful for factory-installed
systems with actively crossed over speaker systems. These indica-
tor LED’s let you know which channels are being summed into the
main inputs.
feat”. In this mode, you will need signal on the Channel 3 inputs to
output signals on the Channel 3 output. We ship the LC7i with the
jumpers in the “On” position. See the “AutoMode Input” section
under “More Highlights” on page 8 for more details.
page 4 page 6 page 7
page 5
Under the Hood - Internal Jumpers
Here are the internal jumpers that allow you to customize the LC7i
for your particular installation.
1. Output Summing Jumpers: Many of today’s better factory
stereo systems include separately-amplied and crossed-over tweet-
ers, mid-ranges, and subs. If you are going to add your own amps
and speakers to the car you will need to combine (or sum) these
separate signals into a single full-range signal for the new system.
With the LC7i, summing is a snap. The LC7i has internal jumpers
that allow you to select which input signals will be summed to the
Main outputs. When the jumper is moved to the “summed” position,
there will also be a corresponding green indicator light on the top
front of the LC7i. The shipped-from-the-factory setting is the non-
summed (separate) position.
2. Ground Isolation Selector: Occasionally alternator noise may
appear in a system because the source unit and amplier are us-
ing different grounding schemes. To help in this situation, we have
provided alternative grounding connections. Make sure your system
is turned OFF before you move these jumpers. We ship them in the
Isolated position, which usually gives the best results.
3. GTO™: The GTO™ jumper enables/disables the Great Turn-
On (GTO™) automatic turn-on circuit. Some cars have a network
of connected systems (integrated mobile phone, assistance services,
etc) that can turn the factory amplier on at a time when the audio
system is actually off. To prevent this from turning your system
on unexpectedly, you can bypass the GTO™ circuit by moving
the GTO™ jumper, and using an applied 12-volts at the Remote
In terminal. However, defeating the GTO™ circuit may result in
some factory features not working fully. Specically, if the original
factory system communicated via the factory amp and speakers, it
cannot do so if the amplier is off. We ship the LC7i with GTO™
in the “On” position.
4. AutoMode: Some cars have unusual signals on their speaker
leads and will not be easily read by the AutoMode circuit. When
this occurs you can manually bypass the AutoMode function. This
is accomplished by moving the internal AutoMode jumper to “De-
P/N 913-115-0
LC7
i
SPECIFICATIONS
All specications are measured at 14.4 VDC (standard automo-
tive voltage). As technology advances, AudioControl reserves
the right to change our specications, like our Pacic Northwest
weather although we are working on it.
Maximum speaker-level input ... 400 watts per channel at 4 ohms
Maximum output level ..................................................... 8.5Vrms
Output gain ......................................................................+/-15 dB
Frequency response ................................................... 10Hz-22kHz
Total harmonic distortion .....................................................0.01%
Input Impedance ............................................................ 20 Kohms
Output Impedance ......................................................... 150 Ohms
Power supply ..............................High headroom PWM switching
Power draw ........................................................................ 350mA
Recommended fuse rating ..................................................2 Amps
Remote trigger max output current ..................................... 1 Amp
Size ....................................................... 7.5”W x 4.72”D x 1.22”H
Weight .................................................................................... 3 lbs
Patent .................................................................................Pending
©2012 AudioControl, Inc. All rights reserved
AudioControl, Making Good Sound Great, LC7i, AccuBASS, GTO and AutoMode are
all trademarks of AudioControl Inc. This manual was conceived, designed, and written
while on a road through the Pacic Northwest on a spectacularly rare, sunny, and cloud-
less day. The top was down and we were banging our head to 80’s metal!
Internal Jumper Conguration
A Guided Tour of LC7
i
Speaker-level Inputs: The LC7i has six speaker-level inputs.
These inputs get their signals from the speaker-level outputs of
your factory-installed source unit or amplier. If your source unit
has front, rear, and subwoofer speaker-level outputs, connect them
to the three sets of inputs on your LC7i. If the source unit only has
front and rear outputs, the AutoMode circuitry in your LC7i auto-
matically routes the Channel 2 signal to the Channel 3 (subwoofer)
output.
The GTO™ circuit, mentioned previously, monitors the main
speaker inputs for the presence of signal. If your installation does
not use the main speaker inputs GTO™ will not function.
Making Good Sound Great
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