Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Can I connect preamp levels to the LC2i and then to my amp? What would be the benefits doing so?
Document: If you are looking for a good preamp/ line out converter, then this is what you are looking for! I have been using this for about a week now in my G8, and it works perfectly for how I set my system up, which if you would like to know it is configured as follows: 1x10W7AE-3, 1x Audio Enhancers slot ported sub box model 10W7S, 1x JX1000 amp, 1x LC2i converter, and 1x PC3.5B 3.5 Farad Planet Audio capacitor. I would recommend this Line out converter for anyone who wants and or needs to control the input to the amplifier due to low output head units, and even ones that do output a good signal.
Fairly straight forward install.Do not mix up speaker inputs at the LC2i or your output will be sketchy or non-existent.I set it up with the recommended dedicated battery connection and common ground at the amp. Audio control recommended this when I had some issues, although I believe the problem in the end was the speaker inputs being incorrect(+ switched with -). Some connect it at the amp + and -, but I changed it from this setup after initial troubleshooting.I can't say as to the sound quality improvement over a high-low converter for $10.99, which I have used in a previous vehicle, but the 2 outputs make it a dream for installing another amp for my now overpowered highs.
The GTO feature is one of my favorites, as it makes probing for an amp turn-on or power antenna (do car manufactureres still make those?) wire in the factory wiring a non-issue since the LC2i senses audio signal and creates it's own turn-on signal that you can then run to your amplifier(s) with your RCAs, all from the same location under your dash, kick panels, etc.As stated before, RTFM to get your levels matched, then enjoy.
And this one does not disappoint. One of the best features is the GTO remote. I use this feature to turn on the amp the LC2i is feeding. This saved me from having to tie the remote in of both devices (LC2i and the amp)to the accessory power which can cause popping when the amp turns on. Oh and while I didn't need to use the AccuBass feature it does seem really cool and would be a must for factory systems with low end rolloff.Oh and for complete disclosure....
I must say the bass is very clean, but I feel that this is a combination of elements, not just the LOC. The adjustments are also nice, however I would turn down the bass boost at the LC2i and rely on your amp/head unit for that, unless you like +50db of bass boost.Setup: (2) 10&#34; Kicker Comp RT(600W rms), Hifonics GLX1400.1, Fiberglass boxes(0.5 cu ft each, 6 layers of mat/cloth), 2 gauge wire, LC2i.
I utilized this unit for my 2013 Ford Mustang Convertible connected to the rear speaker leads and then to a Rockford Fosgate R300X2. My initial thoughts were that the unit didn't work as it never turned off with a constant 12v power. What I later discovered is that my installer had run a signal wire from the car ignition and accidentally connected that to the left speaker input. Once I fixed the problem and had the proper speaker leads, the unit worked great and as expected. I am very pleased with the product and its performance and would recommend this to anyone seeking a high quality way to connect to a factory speaker/HU input.
I recently added a subwoofer and amp to the factory stereo in my gmc terrain. I tried the line level inputs on the amp and also two different line out converters. Every time the sub sounded terrible. Loud booming bass at low levels and from half volume up to full the bass trimmed down to zero output. I added the LC2I and can say it solved 95% of my complaints. It took a while to tune it all in, but in the end I am more than pleased with the performance of the LC2I.
It also is a "line driver" that sends a high voltage (up to 9.5V) preamp signal up to my JL Audio 4-channel amp which powers a pair of Polk 6.5" components and a 8" JL Audio sub.The unit is quite heavy for it's size and appears very well made (made in US). It outputs a very clean signal to the amp. It also outputs a "remote" signal to switch on the amp. The AccuBass feature really boosts the bass.
I tried the high level first (obviously, free option) and had very little response from the sub which i attributed to info i received from my friend about the &#60;1v he measured from the signal source. So already knowing i would probably need a LOC, i had done my research and ordered an LC2i. Install was simple and straight fwd and since i read on a lot of forums that the GTO function (signal sensing circuit) wasn't always reliable, i went ahead and installed the unit using 12v keyed on power to the remote line.
I primarily bought this to clean up the signal, which it did well, however I could not get it to auto sense signal to turn it on (so you don't need a remote lead). This is the GTO (great turn on) feature described. I ended up having to run a remote lead from the fuse panel for it to work. I was looking forward to not having to run it. The remote out feature (to provide remote turn on to other devices) worked fine.I would recommend setting the &#34;output&#34; level to minimum and adjusting any gain you desire on your amp as the signal distorted for me.
Answer: If you have preamp out you dont need this...