Audio Control LC7i User manual
Six Channel Line Output Converter with AccuBASS™ for
interfacing with factory installed audio systems
The LC7itransforms 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-
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quality, after market low-noise, pre-amp level signal that can be
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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
LC7iyou 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
LC7iso 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
®
page 1
Key features of the LC7i
AccuBASS™ bass compensation corrects the bass roll-off in factory
systems
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heating needs
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Quick Install Guide
Since some of you high energy enthusiasts will want to install
your LC7ion your own, we offer a few reminders in the following
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diagrams on page 9 as guidelines.
1. Physically mount the LC7iin a location that keeps it away
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tion that allows you access to the top panel controls.
7KH/&ineeds to be installed in the signal path between
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DPSOL¿HUVDQGRUSURFHVVRUVDo not connect the LC7i between
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page 2
page 3
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your LC7i,QPDQ\FDVHV\RXFDQ¿QGIDFWRU\VSHDNHUOHDGVLQWKH
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Note: If your source unit has front, rear, and subwoofer speaker-
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If the source unit only has front and rear outputs, the AutoMode
circuitry in your LC7i automatically routes the Channel 2 input
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not familiar to you, quickly pack up your LC7iand run to your
nearest authorized AudioControl dealer to have them perform the
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&RQQHFW9SRZHUDQGJURXQG1RWH7KH/&idoes have a
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the LC7ion automatically.
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6. Turn your amp gains fully down before turning on the system.
7. Turn on the system and level match your LC7ito your source
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matching see our technical videos at http://www.audiocontrol.com
8. If your authorized AudioControl dealer installs your LC7i,
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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 Audio-
Control purchases.
page 4
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:0DQ\RIWRGD\¶VEHWWHUIDFWRU\
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ers, mid-ranges, and subs. If you are going to add your own amps
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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
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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-
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Ground Isolation Selector:2FFDVLRQDOO\DOWHUQDWRUQRLVHPD\
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ing different grounding schemes. To help in this situation, we have
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Isolated position, which usually gives the best results.
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system is actually off. To prevent this from turning your system
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factory system communicated via the factory amp and speakers, it
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4. AutoMode: Some cars have unusual signals on their speaker
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page 5
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A Guided Tour of LC7
i
cSpeaker-level Inputs: The LC7ihas six speaker-level inputs.
These inputs get their signals from the speaker-level outputs of
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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
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output.
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speaker inputs for the presence of signal. If your installation does
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dAccuBASS™ Controls: The threshold and level controls let
you determine when the AccuBASS™ circuit activates and the
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eGround:&RQQHFWWRDJRRGYHUL¿HGFKDVVLVJURXQG:DUQ-
ing: factory radio ground wires already have multiple devices con-
nected to them and are not recommended.
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in case of a short to ground or an installation mishap.
page 6
gRemote In: In some installations, you may not want to use
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car’s network system from turning the system on unexpectedly.
hRemote Out:6XSSOLHVYROWV³´ZKHQWKH/&iis pow-
ered up, and is used to turn on external devices like signal proces-
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iMaximized Indicator:7KLVEULJKWO\FRORUHG/('LQGLFDWHV
when the signal level is just below clipping within your LC7i.
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when your system is playing at its maximum volume level.
jPower: If you have connected all of your power wires cor-
rectly, this light should be bright red when your system turns on.
kOptional (ACR-1) Dash Mounted Control Input:<RXFDQ
add a dash control that allows you to set remotely the level of the
subwoofer.
lPre-Amp Outputs: These RCA plugs should be connected to
the next component after the LC7i, such as a crossover or ampli-
¿HU'RQRWFRQQHFWDQ\VSHDNHUVGLUHFWO\WR\RXU/&ioutputs.
Output Levels: These knobs allow you to adjust the signal
level from your source unit to match the input of your after-market
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Channel Summed Indicators:8QGHUWKHFRYHURI\RXU/&i
are jumpers that will allow you to sum selected channels into the
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systems with actively crossed over speaker systems. These indica-
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main inputs.
page 7
Awesome Information
AccuBASS™ Processing
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reproduce bass frequencies at high volume levels. These factory
systems actually remove the bass when you turn up the volume!
AudioControl developed the patent pending AccuBASS™ circuit
to restore the bass that the factory takes away. After a quick and
easy one-time setting, the AccuBASS™ circuit adds the bass just
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solid bass response regardless of volume level. The chart below
shows how the AccuBASS™ operates to correct for the factory
bass roll-off.
Setting the Accu-
BASS™ is a simple one-
time operation:
After you have hooked
up the system and are
listening to music, play
something with a good
bass line, and set the vol-
ume at low.
2QWKH/&i, set the Ac-
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start to drop out in relationship to the high frequencies
and leave the
volume there.
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come back up and leave it in that position.
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tion you want.
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smooth, seamless bass at all volumes and you can even use the
level control to give a little extra kick to the bass if you want. It’s
your music your way!
page 8
More Highlights
Summed Outputs
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some vehicles there is an actively crossed-over tweeter, midrange,
and woofer all in the front of the vehicle. The LC7ilets you take
all of those signals and sum them together to get a high-quality,
full-range, pre-amp signal. Simply move the summing jumper
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summed into the main output.
AutoMode
We have equipped your LC7iZLWKDQ$XWR0RGHIHDWXUHWKDWLV
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outputs to drive a subwoofer amp and crossover. This means your
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ACR-1 Dash Control (Purchased Separately)
The ACR-1 is a remote that gives you control over the level of
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from the driver’s seat.
Placement and Mounting
The ACR-1 dash control may be mounted under the dash using
its own bracket or through a custom hole in the dash. It should be
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purpose.
Bracket Installation
The dash control mounts with two screws, which attach to the
underside of the dashboard. Slide under the dash and place the
dash control in its mounting position, mark the two mounting
holes, drill pilot holes, and secure with two screws.
page 9
Dash Control Assembly
Custom Installation
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semble the dash control from the mounting bracket. Start
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by removing the circuit board and rotary
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for the control along with a
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semble the ACR-1
components in
their new custom
location.
page 10
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