AudioControl LC7i PRO Six Channel Line Output Converter with AccuBASS®

Features

• Six channels of active speaker level inputs (up to 40V input handling)
• Variable outputs with discrete level controls
• AccuBASS® processing for correction of bass roll-off
• Internal channel summing
• Load Selection Switch
• GTO™ Signal Sensing
• Audio Sense turn-on
• Ground Isolation Switch
• ACR-1 dash remote included
• Sounds great bro

Important Safety Instructions

1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not submerge this apparatus in 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 mufflers, silencers, exhaust pipes, or other apparatus (including amplifiers) 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 qualified 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 sufficient size to ensure adequate current to the device. For the LC7i PRO, this means 16-14 gauge wire.
11. Use rubber grommets to protect wiring whenever passing wires through metal openings or bulkheads.
12. Only use attachments/accessories specified by the manufacturer.
13. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as the power input terminals are damaged, objects have fallen into the apparatus, does not operate normally, or has been dropped.
14. A 2 amp fuse is recommended on the +12V power wire.
15. Not tested for use in outer space.
16. Exposure to high sound pressure levels may lead to permanent hearing loss. Take every precaution to protect your hearing.

⚠️ The lightning flash 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 sufficient 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. There are no user-serviceable parts inside. Refer servicing to qualified personnel. WARNING: SHOCK HAZARD - DO NOT OPEN. ATTENTION: RISQUE DE CHOC, NE PAS OUVRIR.

♻️ Recycling notice: If this apparatus has fulfilled its destiny, do not throw it out into the trash. It has to be carefully recycled for the good of mankind, by a facility specially equipped for the safe recycling of electronic apparatus. Please contact your local or state recycling leaders for assistance in locating a suitable nearby recycling facility. Alternatively, AudioControl might be able to repair it for you.

Quick Start

For enthusiasts who prefer to install the LC7i PRO themselves, here are general steps to get started. Refer to additional sections of this manual for more information and installation examples.

1. LC7i PRO is active and REQUIRES CONSTANT +12V POWER.
2. Pick a suitable mounting location that will provide access to the controls and connections. Protect the LC7i PRO from heat, moisture, and dirt.
3. Use the integrated mounting brackets to mount the LC7i PRO.
4. Before drilling holes, take every precaution to prevent 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.
6. Connect the +12V input terminal of the unit to the +12V terminal on the vehicle battery (or distribution block) using 16 to 14 AWG wire.
7. Connect the Ground terminal of the unit to the Ground/Negative terminal of the battery (or distribution block) using the same gauge wire as the +12V power wire.
8. For +12V remote turn on, the Trigger Mode switch must be set to "Rmt In". Connect the Remote In (Rmt In) terminal of the unit to a remote turn-on switch. Alternately, use GTO™ Signal Sense or Audio Sense to trigger the unit on without a remote wire.
9. Connect the speaker outputs of your factory head unit or amplifier to the Speaker Level Inputs on the LC7i PRO.
10. Run the ACR-1 remote wire to the front of your vehicle.
11. Connect the Channel Output RCAs to your aftermarket amplifier.
12. Connect the Remote Out (Rmt Out) to your aftermarket amplifier.
13. Adjust the input gain using the Output Level knobs.
14. Adjust AccuBASS using the AccuBASS Threshold and Level knobs.
15. Enjoy the drive!

Power, Ground and Remote Trigger

1. Power Connector

The LC7i PRO requires constant +12V power and a good ground to operate properly. Connections should be made with 16 to 14 gauge wire.

• +12V: Connect this to a constant +12V source, like the positive battery terminal. Fuse at 2 amps.
• Ground: Connect to the negative terminal of the battery, a ground bus, or a verified ground.
• Rmt Out: Connect the LC7i PRO +12V remote output to your amplifier's remote input.
• Rmt In: When Trigger Mode is set to Rmt In, connect this to your +12V remote trigger. When using GTO or Audio trigger, no Rmt In connection is necessary.

Diagram showing the power, ground, and remote trigger connections on the LC7i PRO. It illustrates the +12V, Ground, Rmt Out, and Rmt In terminals, along with the Trigger Mode switch (Rmt In, GTO, Audio) and Ground Isolation switch (GND, ISO, 200Ω).

2. Trigger Mode

The Trigger Mode switch controls how the LC7i PRO turns on and off. The default and recommended position is GTO.

• Rmt In: This is the traditional way to turn on the LC7i PRO and gives more control of exactly when the unit will turn on. Common places to connect the remote input are from the vehicle's ignition, fuse box, or some other +12V source that turns on and off with the key.
• GTO™: DC offset and Class D switching frequencies are high-falutin technical terms that mean the LC7i PRO can sense when the head unit or amplifier is on, not necessarily when audio is being sent to the LC7i PRO. Use GTO Signal Sense mode when your factory sound system outputs a DC offset or has a Class D amplifier.
• Audio: When this mode is selected, the LC7i PRO will ONLY turn on when you start playing an audio source from the head unit. If you turn the head unit on, but DON'T play audio, the LC7i PRO will not turn on.

3. Ground Isolation

This switch allows you to change how the LC7i PRO is grounded. Sometimes when installing car audio equipment, "ground buzz" or "alternator whine" will creep into the audio path, wreaking havoc on your listening experience. There are 3 positions; GND, ISO, and 200 ohms. The unit ships from the factory in the ISO position.

• GND: Power ground and audio ground are tied together.
• ISO: Power ground and audio ground are separate.
• 200Ω: There is 200 ohms of resistance between power ground and audio ground.

Channel Inputs

4. Channel Inputs (1-2-3)

The LC7i PRO has six speaker-level inputs. This is where you connect the speaker-level outputs of your factory-installed source unit or amplifier.

If your source unit has front, rear, and subwoofer speaker-level outputs, connect them to the three sets of inputs on the LC7i PRO. If the source unit only has front and rear outputs, connect them to the Channel 1 and 2 Inputs and visit the Signal Bus section on page 8 if you want to route audio to the Channel 3 outputs.

Be careful with the speaker wire polarity (+/-), so your new audio system is not out-of-phase and sounding "wonky". If you're not sure which speaker wires to use or the correct polarity, you have a few options: A) find the wiring diagram for your vehicle, B) get an audio T-Harness that is pre-wired and plugs into the factory harness, or C) have your LC7i PRO professionally installed by an authorized AudioControl Dealer.

Diagram illustrating the six speaker-level inputs (Channel 1, 2, 3) on the LC7i PRO, showing the Load Select switches and Signal Bus switches for each channel. It also indicates the AccuBASS controls.

5. Load Select

The LC7i PRO is designed to present NO load to the output of the factory amp, which can make some factory amps upset and stop passing audio. The Load Select feature tricks the factory amp into detecting a speaker load so it will continue to pass audio.

• 20 Ω: Best suited for late model Dodge/Chrysler/Jeep/Ram/Fiat vehicles equipped with OEM base sound system (no separate factory amplifier).
• 60 Ω: Best suited for late model Dodge/Chrysler/Jeep/Ram/Fiat vehicles equipped with a separately amplified OEM "premium" sound system.
• 20 kΩ: Best suited for all other applications.

6. Signal Bus

The Signal Bus switch provides an easy way to combine (sum), route or keep audio channels separate (see page 8 for more details).

• Separate (Sep.): Sep. is the default option. All audio Inputs and Outputs are separate. For example, audio coming in on Channel 1 Inputs is only routed to Channel 1 Outputs.
• Sum/Bus: This setting allows you to combine (sum) two or three channels of audio inputs into a single combined output (see page 8 for more details).

Channel Outputs

Diagram showing the LC7i PRO's output section, including Level dials, Maximized Light (Max), Channel 1, 2, and 3 Outputs, AccuBASS controls (Threshold, Level), Bass Level Control, and Power indicator.

7. Level

The Level dials allow you to adjust the signal level from your source unit to match the inputs of your aftermarket amplifier.

8. Maximized Light (Max)

The Maximized Light can be used to help achieve optimal output level and will let you know if you are getting close to clipping the output of the LC7i PRO.

With the factory system set to its maximum undistorted volume, match the output level of the LC7i PRO to the input maximum of your aftermarket amplifier. If the Maximized Light turns on, the LC7i PRO output is distorting. Turn the output level down until the Maximized Light turns off. IF THE MAXIMIZED LIGHT NEVER TURNS ON, don't panic. This just means the output of the LC7i PRO is not clipping/distorting.

9. Channel Outputs (1-2-3)

These RCA outputs are connected to the inputs of your amplifier or sound processor. When making connections, designate red RCA plugs as right, and designate white, black, or gray plugs as left.

10. Bass Level Control

Connect the ACR-1 to remotely control the output level of the Channel 3 Outputs, ideally controlling the level of a subwoofer. The ACR-1 is strictly an attenuator knob and will NEVER increase the output level past where the Level dial is set.

11. Power

If all power wires are connected correctly, this light will shine bright red when your system turns on.

Setting AccuBASS®

AccuBASS is a feature that restores bass frequencies on factory systems that roll off the bass as you increase volume. If you can hear that the bass does not increase as you continue to turn up the volume on the head unit, then your factory system is most likely rolling off bass.

AccuBASS only affects the Channel 3 outputs.

There are two AccuBASS controls and a status LED used during initial setup: AccuBASS Threshold determines when AccuBASS turns on, and AccuBASS Level adjusts how much bass is restored. The status LED will illuminate when AccuBASS is active.

Diagram showing the AccuBASS controls: Level knob, Threshold knob, and a status LED.

1. Turn AccuBASS Threshold all the way down (counterclockwise).
2. Set AccuBASS Level at the 12 o'clock position.
3. Play some bass-heavy music you are familiar with.
4. Slowly turn up head unit volume until you start to hear bass dropping out (roll off). Stop turning up the head unit volume.
5. Slowly turn AccuBASS Threshold to the right (clockwise) until the status LED illuminates and you hear bass being restored. Stop adjusting AccuBASS Threshold.
6. With AccuBASS Threshold set, you can now adjust AccuBASS Level to your liking.

If the sound system in your vehicle does not reduce bass output at higher volumes, AccuBASS may be defeated, or used without the threshold setting (on all of the time). To defeat (turn off) AccuBASS, turn AccuBASS Threshold all the way down (counterclockwise), and turn AccuBASS Level all the way down (counterclockwise).

To keep AccuBASS on all of the time so it does not turn on/off at a set threshold, turn AccuBASS Threshold all the way up (clockwise). Now, regardless of the head unit volume, AccuBASS will always be on. Adjust AccuBASS Level to your liking.

ACR-1 Dash Control

The ACR-1 dash control may be mounted under the dash using its own bracket or custom mounted in the dash (or anywhere else). It should be within reach of the driver and in a spot where the LED is plainly visible.

Bracket Installation

Slide under the dash and place the dash control in the desired position, mark the two mounting holes, drill pilot holes and secure with two screws.

Custom Installation

Remove the dash control from the mounting bracket by pushing the LED from its holder and then removing the circuit board and rotary control from the bracket. Choose a suitable location and drill a 9/32" hole for the control shaft along with a 1/8" hole for the lock tab and a 13/64" hole for the LED holder. Reassemble the ACR-1 components in their new custom location.

Signal Bus

The Signal Bus switch allows you to combine multiple input signals to a single channel output. It is typically used when connecting to a factory system that has dedicated speaker outputs for the highs, mids and lows. You can use the Sum/Bus function to sum those signals together to create a full range output. Or, if the factory source only has front and rear full range output, the Signal Bus can be set to route (bus) the audio signal from Channel 2 to Channel 3 for that must-have subwoofer channel.

Below are descriptions of typical scenarios of how you can setup your LC7i PRO:

Scenario 1: Separate Channels. Diagram showing all three Signal Bus switches set to the default setting of Sep. (separate). There is no combining or routing of signals. What goes into the Channel Input comes out the corresponding Channel Output. This configuration shows Front, Rear, and Sub inputs mapping directly to Front, Rear, and Sub outputs respectively.

Scenario 2: Add a Sub Channel to a 4-Channel System. Diagram showing Channels 2 and 3 Signal Bus switches set to Sum/Bus. This routes the signal from Channel 2 to Channel 3, effectively creating a subwoofer channel from a combined rear signal. The Front input maps to Front output, and the combined Rear (from Channel 2) maps to the Sub output (Channel 3).

Scenario 3: Sum Highs, Mids, and Lows for Full Range. Diagram showing all channels (High, Mid, Low) with their Signal Bus switches set to Sum/Bus. This combines all input signals to create a glorious full range signal on all outputs. This configuration is useful for factory systems with dedicated high, mid, and low frequency outputs that need to be combined into a single full-range signal for aftermarket amplification.

System Examples

System #1: Basic Factory Upgrade System

This diagram illustrates a basic factory upgrade system using the LC7i PRO and an AudioControl LC-5.1300 amplifier. The factory source (head unit) connects to the LC7i PRO's Front and Rear inputs. The LC7i PRO's Channel 2 and 3 Signal Bus switches are set to Sum/Bus. The LC7i PRO's outputs (Front, Rear, Sub) connect to the LC-5.1300 amplifier. The amplifier then drives a subwoofer, front speakers, and rear speakers. The ACR-1 remote control is also connected to the LC7i PRO.

System #2: Factory Amplified Upgrade System

This diagram illustrates an upgrade system for a factory amplified setup, using the LC7i PRO, an AudioControl LC-6.1200 amplifier, and an AudioControl LC-1.800 amplifier. The factory source (head unit) connects to a factory amplifier, which then provides separate Highs, Mids, and Lows outputs. These outputs connect to the LC7i PRO's Channel 1 (Highs), Channel 2 (Mids), and Channel 3 (Lows) inputs. All Channel 1, 2, and 3 Signal Bus switches on the LC7i PRO are set to Sum/Bus to create a full-range output. This full-range output from the LC7i PRO then feeds into the LC-6.1200 amplifier (for tweeters and midrange speakers) and the LC-1.800 amplifier (for woofers and subwoofers). The ACR-1 remote control is also connected.

Specifications

All specifications are measured at 14.4 VDC (standard automotive voltage). AudioControl reserves the right to continuously change specifications.

• Maximum Input Handling: 40V / 400W
• Maximum Output Level: 9.5 Vrms
• Output Gain: +/- 15 dB
• ACR-1 Attenuation Range: 0 dB to -21 dB
• Frequency Response: 20 Hz to 20 kHz
• Total Harmonic Distortion: <0.1%
• Signal to Noise: >124 dB
• Input Impedance: Selectable (20 Ω, 60 Ω, 20 kΩ)
• Output Impedance: 150 Ω
• Power Draw: 330 mA
• Recommended Fuse Rating: 2 Amp
• Weight & Dims: 1.15 lbs. / 7"L x 5.1"W x 1.14"H
• Warranty: 5 Year Warranty (www.audiocontrol.com/warranty/)