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AudioControl LC2i-PRO 2-Channel Line Output Converter with ACCUBASS and Impedance Matching
- Active Speaker Level Inputs (Up to 40V Input Handling)
- Built-In Line Driver with up to 9.5 Vrms Output
- AccuBASS Bass Roll-off Compensation Circuit
- Load Selection Switch for Painless OEM Integration
- Slim Chassis with Integrated Mounting Brackets
- AudioControl Universal Dash Remote (ACR1) Included
GTO Signal Sense
DC offset is a highfalutin technical term that means the LC2i PRO can sense when the head unit is on, not necessarily when audio is being sent to the LC2i PRO. Use GTO Signal Sense mode when your factory sound system outputs a DC offset when it is on.
ACR-1 Level Control (Included)
The ACR-1 is a great way to control the Bass Output level being sent to your subwoofer amplifier. The ACR-1 ONLY controls the level of the Bass Output and is strictly an attenuator knob. The ACR-1 will NEVER increase the Bass Output level past where Bass Output Level knob is set.
Audio Sense
When this mode is selected, the LC2i PRO will ONLY turn on when you start playing a source from the head unit. Whether it be the radio, CD player or streaming via Bluetooth from a mobile device. If you turn the head unit on, but DON’T play audio, the LC2i PRO will not turn on.
Remote Input/Output
Input: This is the traditional way to turn on the LC2i PRO and gives you more control of exactly when the unit will turn on. Most common places to connect the remote input are from the ignition of the vehicle, fuse box, or some other 12V source (such as a cigarette lighter).
Output: Use the Remote Output (Rmt Out) to trigger on your aftermarket amplifier. When the LC2i PRO turns on (regardless of method) the Remote Output will always be active. Do not connect more than two amplifiers to the LC2i PRO Remote Output. Connecting more than two amplifiers may damage the LC2i PRO.
Ground Isolation Switch
This handy switch allows the user to change how the LC2i 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.
Load Selection Switch
The LC2i PRO is designed to present NO load to the output of the factory amp, which can make some factory amps upset and may stop passing audio. The Load Selection feature tricks the factory amp in to 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
Setting Levels - Main Output
Main Output: Fixed full range output suitable for connecting to multi-channel amplifiers for door speakers. Use the Main Output Level knob to adjust level for this output.
Bass Output: Variable low passed output (1000 Hz low pass) and is suitable for connecting to a subwoofer amplifier. Use the Bass Output Level knob to adjust level for this output. Once the Bass Output level is set for optimum signal, level can be adjusted on the fly using the included ACR-1 level control.
Power
As awesome as it is that the LC2i PRO can be turned on 3 different ways, you still very much need to connect the LC2i PRO to constant +12V power and ground.
Maybe one day science will invent a way to electrically power devices via the sweet guitar solo of Jimi Hendrix, but until then, we need +12V power and ground.
Indy
August 7, 2025
Very good product, have excellent instructions on how to connect it. I love the front knob to control bass.
Marco Sigillo
July 22, 2025
Although these are primarily used for car audio to enable addition of amplifiers and subwoofer to a factory radio , I used this as a home receiver tool to add pre-outs to run my Center channel from a secondary amplifier.This allowed me to run 2 Center speakers together bi-wired using a channel A+B amplifier as secondary mode. To power it, I repurposed a USB Sata adapter power supply ( for external drives) and was able to run a trigger wire from the main receiver to power it on at the same time as the main receiver.I was very happy with the result. It widened the presence of the Center speakers (2) considerably and sounded awesome.
CSI Roland
June 27, 2025
This is my go to product for line out converters, excellent performance
Sky
May 7, 2025
Easy way to derive clean bass signal from a system with no subwoofer output. In hindsight I would have ordered the audio control mini amplifier which has this built in. It would have saved space and time during install...
Neil Bestard
April 29, 2025
Does what it is suppose to do. Great for adding thump to a vehicle without ripping your dash apart
Jeff P.
April 1, 2025
Easy to hook up, system in car sounds great. Been upgrading stereos and this is a great fit for any factory set up
Diane G.
March 26, 2025
Be careful when ordering this product because the return window is 30 days after ordered. Unfortunately I only installed the product 2 weeks after receiving it, only giving me less than 2 weeks to figure out what's wrong. My factory system from my new car has a premium sound system which has an amplifier and built in crossovers. The sound was distorted. I just ordered audiocontrol's Dm-608, which will hopefully work well.
jamiekenmacmullin
March 3, 2025
This is one of the best like output converters I’ve ever used, my civic can now be heard from the 17th floor of my building, public disturbance mode is what I call it
Jason Fowler
February 24, 2025
If you're like me and have a newer vehicle with lots of factory options that run through the head unit, going aftermarket can be a huge pain in the rear. This active LOC has crystal clear sound output without all the engine noise and muddy sound processing from a budget aftermarket setup. Works even better if your car has a factory amplifier with a low frequency output. It's also fairly easy to install whether you have very little experience, or many years of car audio under your belt. There are also some very easy to follow youtube guides that explain all of the features and how to easily set them.
Psybenjas
January 28, 2025
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Jason glowacki
January 11, 2025
For years I was running a cheap active LOC in my 2014 hyundai veloster turbo, and I wanted more from my subs. I'm running two alpine type R's (swr-10d4) 1000W RMS each, wired to one ohm on a Hifonics Brutus (BRX2000.1D) 2000W RMS @ 1 ohm.I wanted to upgrade my prefab box thinking this was my issue. I did some research and found that I have my gains set too low and after setting this to the proper level it sounded louder but still sounded distorted. It was then I understood my cheap LOC was the reason why, I was getting distortion with barely any preout voltage (had to turn my gain 'way up' to match the low preout voltage.)I decided to bite the bullet on this LC2I. I tapped into the factory subwoofer and played a 50hz 0db test tone through my radio, set at 30/35, turned my level up on my LC2I until the maximized light came on, then backed it off a little. To set my gains on my amp, I took the square root of my 2000w amp multiplied by the one ohm to get my target voltage at the amps output terminal (44.72 V)I then tested my voltage with a DDM at the amps outputs terminals and used the amps gain knob to achive my target voltage of 44.72. The gain was turned down substantially compared to when I was using the cheap LOC, proving the new LC2I was providing a higher preout voltage.The quality and clarity of the subs are now night and day different. I wish i did this upgrade alot sooner. This was well worth the money spent, and if you are using a cheap LOC and looking for more out of your system this is a no brainer. Just do it.
Jovan
November 21, 2024
Works great. Really pleased with the sound quality it has when keeping factory stereo
Pashan Vossoughi
October 21, 2024
Definitely recommend if your system is stock. This will help bring the true output your subs need. If you have an aftermarket head unit this won't be needed. I wanted to retain the oem unit at least for a while until I find an aftermarket one down the line(money). Installation wasnt too bad, found a few youtube videos that helped. Works great, and the remote bass knob hasn't had any issues. The old Skar remote bass knob took a crap so hopefully this one is better quality. These are Skar SVR series 10" in their enclosure. I'm sure a custom box would be a better upgrade, but this hits pretty hard for now.
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