I just want to clean up the bass and maybe add a little punch so I picked up a Pioneer TS SWX 251 compact sub and an alpine MRP M500 amp. The Pioneer will allow me to keep the cargo cover on as well. I just need the LC2i which I'll have to order. Any opinions on what to tap this into would be appreciated. 90 ST suggested the sub output but if I do that would I parallel it into both inputs on the LC2i?

Yeah, I'm almost positive that the lc2 is the only LOC audio control has that does not sum the 2 inputs. All others will do this internally.
you have to do it as you described.

The instructions don't even mention it, i was the AC sales rep, which is why i know. Once you open it up it should be obvious, if not you can always call their tech line, they are very good at walking you though things.

I emailed Dan today at AC and he told me to just parallel the sub output into the left and right LC2i inputs. I forgot to ask him about any internal jumpers or anything. Don't see why that would be necessary as there is nothing to sum, it's the same signal. Am I missing something here? Here is his comments:

Thank you for your question and interest in AudioControl. Where to tap in will depend on whether you have full range and how you want fade to affect your subwoofer. The LC2i does not require full range signal, it is an active line output converter and what goes in comes out. As far as using one pair from your sub output, that is fine. If your amp requires 2 channels at the input, you could y out either at the speaker level output from your amp or at the RCA output from the LC2i. If you can run fully mono, then just stick with the left side on the LC2i, which is where the GTO Signal Sense lives.

The jumpers are not to sum, but to be able to acept a low level input from a pre out, not speaker level, which is how it comes.

I was playing around with the stereo yesterday and found a way to get a bit more apparent bass out of the system - set the fader to R1 or R2. (This attenuates the signal to the front speakers slightly, the way most stereos work.) Turn up the volume a notch or three and, voila, more bass. Probably won't do you much good if you run with the volume all the way up. You may not like the way it affects the F/R balance, but it's not enough to bother me.

It also helps to remove the carpet and pad from over the sub unit. If you do that, I suggest taping some thin cloth over the sub port to keep debris out.

Well I'm tapped off the sub output so I want it at speaker level.
I got the mount built and installed, relocated the Bose amp, wired and installed the alpine amp and ran the power lead from the battery. I had to order the LC2i so once it comes in tomorrow I'll be able to finish it all up.

I'll be doing the same soon. My LC2i will be delivered tomorrow also. I'm waiting on my Wicked CAS corner box to be shipped. Still deciding on an amp. Either the Alpine MRP-M500 or Fosgate R500-1D. Both are comparable. The Fosgate does come with a bass/gain remote. :confused:

I got the alpine mrp m500 as well so I'll let you know how it goes. I will say that it was a very tight fit and tricky to get in the space in front of the struts.

The Fosgate is about 3" smaller. I've read good reviews on both.

It's the width or front to back that would be the issue. I would go with something around 9" or less.
Now I'm just trying to figure out the best way to set this up as the amp and LC2i have a gain on them.

Check the input levels on your amp gain, and use that as a starting point for your lc2. The lc2 Has an output of up to 13.5 volts, I believe.
If your amp input gain only goes up to, say, 5 volts, you are going to want to start pretty low on your lc2. ( 1/4 of 13.5 is around 3.375 ) so, in that example, I would set the lc2 gain at about 1/4, and then set your amp gains accordingly.

Thanks RonRizz, the specs list input sensitivity at 0.2 - 4.0V so I'll base it on that as you stated. :tiphat:

So I got everything connected and it all worked perfectly including the remote trigger on the LC2i. Man what a difference this has made to the stock Bose.
I'm very pleased. :tup:
This is only a single 10" at 200W but it hits plenty hard enough without overpowering the stock system. Any more and I feel it would be too imbalanced. Not entirely clear on the LC2i settings yet and the bass roll off if any, so I'll drive it with the hatch interior out for a few days and play with the settings.

Glad to hear it worked out for you