Installing Sub & Amp to factory stereo.

[Vaks]

Hey guys, I have a 2013 Audi A4 with no MMI/Nav. It says Audi Concert above the cd slot in my car.

I have a JL amp (JX250) and a 12"w0v3 JL sub. This used to be in my Benz in an aftermarket head unit which was easy to install. I also had a Low/High pass filter on my headunit so I don't know how I can match that on a stock unit. I really enjoy the speakers I have now but really want to install this sub to hit the low notes. How is it possible to have this installed? Looking to wire in a reverse camera soon so I'd like to do everything together.

[2k12A4]

Any luck with this?

[doug97gxe]

http://www.audiworld.com/forums/audi...te-up-2776325/
https://snapguide.com/guides/audi-a4...oofer-upgrade/
http://www.audizine.com/forum/showth...ystem-Pictures
http://www.audizine.com/forum/showth...ofer-Cubby-Box
http://www.audizine.com/forum/showth...B-amp-O-system
http://www.audizine.com/forum/showth...and-Amp-Add-On

[yourpalcal]

I just did this to my A4 2014 also without MMI/Nav. The easiest way is to buy a AudioControl LC2i and use the wires going into the rear sub (underside of the rear deck there are a brown and tan wire going into the factory sub. Disconnect the subwoofer and use a wire tap for the new speaker wire. I had to call AudioControl on this but you only need to splice the factory sub wires into the left channel input and use the Bass output RCA channel for your amp (make sure the LC2i is set to "GTO Enable"). Also, the LC2i does not need a remote in (optional) but will still give you a remote out if you need it for your sub amp. As for the amp connection, the battery is in the trunk so tap into the positive (disconnect the negative first) one one of the bolts on top and if you look next to the factory amp (left side of trunk) there is a negative bolt that you can access and ground your sub and LC2i next to the factory ground. I highly recommend using a distribution block since the LC2i will require much smaller power and ground wires than your amp and it will make everything cleaner.

IMG_2849.JPGIMG_2850.JPGIMG_2851.JPGIMG_2848.JPG

While all of this was a significant improvement in bass, I am about to (after much research) completely redo the entire audio system. My goal (since the car is a lease) is to bypass the factory stereo, amp and speakers (only the front door speakers will be replaced). My factory system will serve only for phone calls while my iPhone will be the source unit for audio and navigation. Since this will bypass the factory system it should work for MMI and B&O systems. I plan to start on this in the upcoming weeks. If you guys have any interest I will post pics of the project.

[Vaks]

Any luck with this?

Still haven't gathered all the information to begin the install. I've figured out the process of the install just not completely sure of exactly what I'll need.

[Vaks]

Thanks for the info! Trying to keep the use of my JX250 even though I'll possibly be upgrading this amp later down the road. I've figured out the basics with the line out converter and tapping into the stock sub wiring. Just need to figure out how to wire in my remote wire to the fuse box and using a pigtail fuse if possible for a cleaner install

[doug97gxe]

Thanks for the info! Trying to keep the use of my JX250 even though I'll possibly be upgrading this amp later down the road. I've figured out the basics with the line out converter and tapping into the stock sub wiring. Just need to figure out how to wire in my remote wire to the fuse box and using a pigtail fuse if possible for a cleaner install

the B8 has a red row of fuses in the trunk.. the B8.5 does not.. i tapped into a relay and it works

[Vaks]

That's the last bit of info that I need. I'll be purchasing a PAC line-out converter and a wiring kit soon. Just need to know what I can use to tap into a fuse to run the remote wire!

[vdubtucckn]

Thanks for the info! Trying to keep the use of my JX250 even though I'll possibly be upgrading this amp later down the road. I've figured out the basics with the line out converter and tapping into the stock sub wiring. Just need to figure out how to wire in my remote wire to the fuse box and using a pigtail fuse if possible for a cleaner install

If you use the Audio Control LC2i you won't need to find a remote. The LC2i turns "ON" once it senses a signal from the input speaker wires (factory sub input). It also has a remote "IN" (IF you want to bypass that previously mentioned feature) and remote "OUT" that can be used to run a remote switch to your aftermarket amp. I am also in the process of upgrading my factory sub because my air tank needs to be installed in the factory subs location. I'll be running the LC2i LOC, JL Audio XD600/1 and 10W3. I'll keep you posted.

[Vdubz]

I've had an LC2i for a few months and haven't had time to do my install. I had the same idea to tap into the stock sub. Glad to know it works. Might make some time this weekend to drop in my 12 from an old car. Thanks for the info.


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[Vdubz]

What was the settings on your LC2i if you don't mind me asking? And did you plug the factory sub back in to use with your aftermarket sub?


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[doug97gxe]

What was the settings on your LC2i if you don't mind me asking? And did you plug the factory sub back in to use with your aftermarket sub?


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On mine I have everything in the middle haven't played with any other setting as yet been meaning to.. My factory sub is disconnected


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[Vdubz]

Thanks. Just saw your reply. Too much crap going on in my tapatalk feed.


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[NRigs]

the B8 has a red row of fuses in the trunk.. the B8.5 does not.. i tapped into a relay and it works

how safe is it to use a relay? I also have a b8.5 and did not think to use this. i tried all the fuses and they are all constantly on leaving my amp on. This relay turns on / off with your car?

[doug97gxe]

how safe is it to use a relay? I also have a b8.5 and did not think to use this. i tried all the fuses and they are all constantly on leaving my amp on. This relay turns on / off with your car?

I've been using it for over a year no problems and yes it turns off with the car


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[Vdubz]

Started my install the other day. My LC2i doesn't turn on with the signal from the factory sub. Jumper is in the right place. It does turn on with a remote signal but it kind defeats the purpose of the reason I got that.


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[doug97gxe]

Started my install the other day. My LC2i doesn't turn on with the signal from the factory sub. Jumper is in the right place. It does turn on with a remote signal but it kind defeats the purpose of the reason I got that.


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its not strong enough.. you have to use the turn on lead

[Vdubz]

its not strong enough.. you have to use the turn on lead

thanks


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[Vaks]

how safe is it to use a relay? I also have a b8.5 and did not think to use this. i tried all the fuses and they are all constantly on leaving my amp on. This relay turns on / off with your car?

I've been using it for over a year no problems and yes it turns off with the car


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I wouldn't recommend using a relay for power. I found some fuses that actually turn off on my B8.5. Sadly the ignition must be on for the sub to be playing. I went through with the install and everything has been working good, going to be pulling the trigger on picking up the JL XD600 very soon. Might rearrange all the wiring and tidy it up, so if I do maybe I'll post a diy for others

[bestgio850]

I wouldn't recommend using a relay for power. I found some fuses that actually turn off on my B8.5. Sadly the ignition must be on for the sub to be playing. I went through with the install and everything has been working good, going to be pulling the trigger on picking up the JL XD600 very soon. Might rearrange all the wiring and tidy it up, so if I do maybe I'll post a diy for others

Hey OP,
How did the install turn out? I'm also in a very similar situation like you(non b&o and no mmi, Audi concert) but 2012! I already have the sub(JL audio 12w1 v3-2) and amp (Rockford fosgate p400x1) installed with the lc2i, but for some reason my sub doesn't seem to be able to hit the low lows found in certain songs. Do you happen to have that issue as well? Or could it be something with the head unit that's cutting these notes out.