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      03-26-2012, 12:06 PM   #1
ILSMKU
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LC2i keeps failing on me.

Hey all,

For some reason, LC2i keeps loosing volume. I have a sub and AMP connected to my LC2i and the BASS hits when I first set it up, but over time my BASS disappears to the point my seat subs make more noise than my 12" JL sub.

If I crank up the LC2i gain, it will sound better, but a few days later, it will drop in volume again to the point my seat subs are louder. Being Ive run into this twice now has me wondering if this thing can really handle the volt spikes coming off the EPS system.

Interestingly enough a buddy of mine who also has an LC2i with a sub and amp in a E92 just told me his is doing the same thing.


Has anyone else experienced this with an LC2i? Its frustrating.

Thanks!
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      03-26-2012, 12:13 PM   #2
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I am in the same boat. Unit works great for a period of time and then you constantly have to up the gains to keep the output the same. It's very frustrating indeed. I don't really want to spend more money on coding plus additional on the extra amp(s) needed to power the stock setup but this is getting ridiculous.
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      03-26-2012, 12:16 PM   #3
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how is it wired? are you using technics harness? Make sure that when your getting the signal from the subs underneath that you only use the signal of one sub and not both!. This isnt mentioned and i had to figure this out the hard way. Instead of 4 wries going into the lc2i there should be a left neg and right positive from only one speaker. HOPE this helps
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      03-26-2012, 12:19 PM   #4
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Quote:
Originally Posted by aresh View Post
how is it wired? are you using technics harness? Make sure that when your getting the signal from the subs underneath that you only use the signal of one sub and not both!. This isnt mentioned and i had to figure this out the hard way. Instead of 4 wries going into the lc2i there should be a left neg and right positive from only one speaker. HOPE this helps



Say WHAT? My line input has 4 wires going into it!

Yes I have Technics harness.
My 12v comes off the amps power line.
Remote comes off the thin black wire behind the passenger seat
My ground is off the amp, which is grounded to the ground location in the rear passanger fender well, where other stuff is grounded.
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      03-26-2012, 12:20 PM   #5
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Quote:
Originally Posted by ILSMKU View Post
Say WHAT? My line input has 4 wires going into it!

Yes I have Technics harness.
My 12v comes off the amps power line.
Remote comes off the thin black wire behind the passenger seat
My ground is off the amp, which is grounded to the ground location in the rear passanger fender well, where other stuff is grounded.
Ditto!
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      03-26-2012, 12:21 PM   #6
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Quote:
Originally Posted by aresh View Post
how is it wired? are you using technics harness? Make sure that when your getting the signal from the subs underneath that you only use the signal of one sub and not both!. This isnt mentioned and i had to figure this out the hard way. Instead of 4 wries going into the lc2i there should be a left neg and right positive from only one speaker. HOPE this helps
That does not make any sense. How that came about?
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      03-26-2012, 12:32 PM   #7
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It might make sense in the fact that we should technically only need the output of one speaker for the signal we need since this is a mono application. So is it possible that running both sets of speaker wires to the LC2i is causing TOO much voltage to run through the unit therefore killing it? If I had my car here today, I could use a DVM to check what the output is from the stock speakers.
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      03-26-2012, 12:42 PM   #8
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Quote:
Originally Posted by aresh View Post
how is it wired? are you using technics harness? Make sure that when your getting the signal from the subs underneath that you only use the signal of one sub and not both!. This isnt mentioned and i had to figure this out the hard way. Instead of 4 wries going into the lc2i there should be a left neg and right positive from only one speaker. HOPE this helps

Can you please explain this again? Are you saying it should use the LEFT channels NEG with the RIGHT channels POSITIVE? Like what you would typically do for a bridged setup?
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      03-26-2012, 01:02 PM   #9
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my LC2i has had all 4 wires plugged in since day one
never had issues
and my amp gain is almost at the minimum, so i don't think the above theory is true
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      03-26-2012, 01:04 PM   #10
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Quote:
Originally Posted by kmarei View Post
my LC2i has had all 4 wires plugged in since day one
never had issues
and my amp gain is almost at the minimum, so i don't think the above theory is true
What settings are you running on the LC2i if your amp gain is near minimum?
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      03-26-2012, 01:05 PM   #11
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Quote:
Originally Posted by kmarei View Post
my LC2i has had all 4 wires plugged in since day one
never had issues
and my amp gain is almost at the minimum, so i don't think the above theory is true

All 4 of mine are wired and it appears Ive burnt up 2 LC2i's.

The LC2i gain is at 10am. At mid way (stock) the red light flashes.
My amp gain, is not even 1/4th the way up.

And it was pretty loud. But over time the bass has just disappeared. When I went outside to check how many wires I had connected, I thought I smelled burnt electronics again... God dammit.
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      03-26-2012, 01:10 PM   #12
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The OEM amp is not bridgeable so I don't think you should try to do that. You risk damaging the OEM amp. Now the signal to the underseat woofers is stereo, at least in the midbass frequencies and I'm sure it is mono in the bass and sub bass frequencies. So... If you are running and add-on sub in the trunk in conjunction with the OEM woofers, then it think it would be ok to tap only one side of the amp outputs, BUT if you are externally amping the underseats then you would lose some stereo separation in the midbass range.

For those who are having issues with the LC2i, are you adding bass boost from the head unit EQ??? If yes, that may be your problem. If not, the LOC may not be capable of handling the output of the OEM amp.
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      03-26-2012, 01:10 PM   #13
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Originally Posted by THE TECH View Post
What settings are you running on the LC2i if your amp gain is near minimum?
This is the only pic i have (all are at minimum)
but since then i've raised the sub knob to around 9 oclock (i'm using the sub out not the main out)



will take another pic when i leave work to verify
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      03-26-2012, 01:11 PM   #14
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Originally Posted by kaigoss69 View Post
For those who are having issues with the LC2i, are you adding bass boost from the head unit EQ??? If yes, that may be your problem. If not, the LOC may not be capable of handling the output of the OEM amp.
to further that
i have my bass set to 0
and i have my EQ flat at all bands
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      03-26-2012, 01:11 PM   #15
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when i had all 4 wires plugged in, my sub would never hit hard and they would almost always blow or my amp would over heat. The reasoning i have, your getting signal, a low pass signal from the two subs underneath, just one signal from one sub would give you a clear signal rather than having two signal pushed into one sub. the way i have mine setup is, pick any sub you want signal from and cut the other sub out. EX. right l7 subwoofer, right postive and right negative will go into your lci.

Last edited by aresh; 03-26-2012 at 01:17 PM.
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      03-26-2012, 01:13 PM   #16
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Also with all 4 wires in, i could not run the LCi more than minimum, once i cut of the other L7 sub signal, i was able to set the gain of the LCi perfectly.
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      03-26-2012, 01:16 PM   #17
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Quote:
Originally Posted by kmarei View Post
my LC2i has had all 4 wires plugged in since day one
never had issues
and my amp gain is almost at the minimum, so i don't think the above theory is true
can you run you LCi any higher than half way without it distorting? When i had mine plugged in that way, the unit wasn't able to go any higher than minimum or 9 o clock position without distortion.
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      03-26-2012, 01:17 PM   #18
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Quote:
Originally Posted by aresh View Post
when i had all 4 wires plugged in, my sub would never hit hard and they would almost always blow or my amp would over heat. The reasoning i have, your getting signal, a low pass signal from the two subs underneath, just one signal from one sub would give you a clear signal rather than having two signal pushed into one sub. the way i have mine setup is, pick any sub you want signal from and cut the other sub out. EX. right l7 subwoofer, right postive and right negative will go into your aftermarket amp.
Quote:
Originally Posted by aresh View Post
Also with all 4 wires in, i could not run the LCi more than minimum, once i cut of the other L7 sub signal, i was able to set the gain of the LCi perfectly.
Quite interesting.
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      03-26-2012, 01:17 PM   #19
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Quote:
Originally Posted by ILSMKU View Post
All 4 of mine are wired and it appears Ive burnt up 2 LC2i's.

The LC2i gain is at 10am. At mid way (stock) the red light flashes.
My amp gain, is not even 1/4th the way up.

And it was pretty loud. But over time the bass has just disappeared. When I went outside to check how many wires I had connected, I thought I smelled burnt electronics again... God dammit.
if i remember correctly
when i first started my install i had the gains all the way up on the LC2i
and at minimum on my XD600/1, thinking you normally want the amp gain at minimum, to maximise signal/noise ratio.
but it sounded like shit, sounded like i was overdriving something
when i raised the amp gain and lowered the lc29 gain it sounds normal again
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      03-26-2012, 01:17 PM   #20
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Quote:
Originally Posted by aresh View Post
can you run you LCi any higher than half way without it distorting? When i had mine plugged in that way, the unit wasn't able to go any higher than minimum or 9 o clock position without distortion.
What was your amp gain like?
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      03-26-2012, 01:19 PM   #21
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Quote:
Originally Posted by aresh View Post
can you run you LCi any higher than half way without it distorting? When i had mine plugged in that way, the unit wasn't able to go any higher than minimum or 9 o clock position without distortion.
no
i can't run the lc2i any higher, or it distorts
but i have no need to
i have plenty of volume when its set to 9o'clock
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      03-26-2012, 01:20 PM   #22
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Quote:
Originally Posted by kmarei View Post
to further that
i have my bass set to 0
and i have my EQ flat at all bands
Unfortunately, this seems counterproductive. I can understand maybe keeping the Bass at zero or not adding additional, but to have to keep the EQ flat in order to keep things happy seems to be giving up one thing to have another.
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