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Topic Review (Newest First)
05-20-2013 06:36 PM
jeepedjeep I did the same thing as you did allblackeejk. I like the sound I have now I just put a JBL 804 sub in the stock enclosure plenty of bass for my liking. I mounted the amp pdx5 and LC8 under my passenger seat with one of my brackets I make.

I bet it took me about 15 total hours knowing nothing about the stock alpine system but all is good now. I can hear so clear it's kind of nuts!
12-31-2012 11:40 AM
AllBlackEJK I ended up installing a 5 channel amp and redoing the whole system but retaining the factory nav (730n) because I liked the integration. I learned a lot about the factory premium system in the process. To answer the ques I only used one set of the factory DVC sub wiring for the JL sub and taped up the other set and left it in the enclosure. It should be adequate for the 180w i had going to it. Sub install was pretty easy but i would recommend taking the enclosure out of the jeep to do the work. Hardest part was getting the spacer to line up w/ the factory holes bc i marked the holes for drilling with the holes on the factory grill and it the grill didn't sit flush so there was some room for error w/ my pencil. The whole project, (sub/amp/processor/sum device) install was a major project (esp if u live in a city w/ no garage) and if i could do it again i would do it a little differently.

If you just want more bass just get the pac interface and you get rca outputs you can feed right to an aftermarket amp w/ no cutting of any factory wiring. You can use the remote level control to change the volume of the sub. This is how i plan on doing my new system in my 2013. The front components sound better when you don't have to boost the bass level so much from the dash.
12-30-2012 09:27 AM
Binx The speakers are covered under warranty, sub included. I dont think any shallow mount is really going to be that impressive, better than stock yes.
12-30-2012 08:37 AM
Calys003
Quote:
Originally Posted by AllBlackEJK
JL 8w3v3 in the stock sub location sounds pretty nice. Goes real deep. U need an amp, spacer ring and dynamatt for the interior of the box. If you're trying to keep the stock look thats imo the way to go. Did that in my 2012 and it was more than enough for me.
Did you use the factory amp? How did you wire it because the Jl 8w3v3 is a single voice coil and the factory sub is a dual
12-29-2012 01:03 AM
AllBlackEJK JL 8w3v3 in the stock sub location sounds pretty nice. Goes real deep. U need an amp, spacer ring and dynamatt for the interior of the box. If you're trying to keep the stock look thats imo the way to go. Did that in my 2012 and it was more than enough for me.
12-28-2012 01:41 PM
Rondondo For a '13, I'd go the warranty route. I think the stock sub sounds good.
12-28-2012 01:30 PM
Nextgen
Quote:
Originally Posted by bigkevj View Post
I am clueless on Audio as well. I have a 13 sahara with premium sound and was looking to replace the sub as well, but didnt want to build a box if i didnt have to. I replaced head unit with Kenwood dnx6190hd. Can I just pull out the factory sub and plug in the Polk MM840 w/o any fabrication? will it sound better with the head unit I have?
Do you have uConnect in your Sahara? I'm curious if swapping out the head unit will have any effect on that feature.
12-28-2012 12:15 PM
MaskMan
Quote:
Originally Posted by bigkevj View Post
Can I just pull out the factory sub and plug in the Polk MM840 w/o any fabrication?
Yes you should be able to, but I have not seen the 2013 enclosures to be totally positive.

However, to give the sub the best chance to sound good:

Quote:
Originally Posted by MaskMan View Post
Bracing and damping the OEM enclosure is a must too.
If you cannot perform the mods yourself or don't know how, see a 'quality' Car Audio professional. A lot of hack and slash installers will not know how to do this either. At the basic level you need some dynamat and poly fill on the inside of the enclosure. I would also use some mass loaded vinyl, closed cell foam and non-hardening clay and fabricate some type of internal bracing where needed.

Quote:
Originally Posted by bigkevj View Post
will it sound better with the head unit I have?
Maybe, limiting factor is power for controlling the sub in such a small sealed enclosure:

Quote:
Originally Posted by MaskMan View Post
You will need a real 500w amp for them to really work well.
It is all easy stuff, check out some DIY audio boards for info.
12-28-2012 10:01 AM
bigkevj I am clueless on Audio as well. I have a 13 sahara with premium sound and was looking to replace the sub as well, but didnt want to build a box if i didnt have to. I replaced head unit with Kenwood dnx6190hd. Can I just pull out the factory sub and plug in the Polk MM840 w/o any fabrication? will it sound better with the head unit I have?
12-28-2012 09:02 AM
MaskMan Amazon has them for $106
At that price I don't think you can get a better sub for the enclosure.
It is interesting that the MSRP last year as $150, now it is $190.

For a 8" sub they hit hard and low in a small enclosure.
You will need a real 500w amp for them to really work well.
Bracing and damping the OEM enclosure is a must too.

I am going to do two custom fiberglass boxes over the rear wheelwells using 10" Alpine SWR-T10 or the new JL 10tw3 (if they ever come to market) flat subs with a JL HD750/1 amp. My project for this spring if nothing else gets in the path...
12-28-2012 06:52 AM
Calys003 Is the Polk mm840 worth the $200? As an temp upgrade?
12-28-2012 01:01 AM
MaskMan I will start by saying:
If are a 1000 people on the board you will get 2000 answers to your questions...

I personally cannot stand the new Kicker stuff, the tweets are especially harsh.
To me they sound like a$$, I think that the alpine/infinity stocks sound better...

I would go with some higher end speakers all around if it were me.
Spend more on the front speakers, the stock tweets are trash (maybe the alpines are better?)

I also do not like full range speakers so close behind my head.
I don't care about my passengers and their listening pleasure.

If you have a JK Unlimited there is a very nice JL 13tw5 stealth box (pricey but sick)

I actually bought a take out 730n and will be running a JLB MS-8 processor.
I like the factory integration, think it sounds OK, and works very nice so far.
For what it does it is closest aftermarket is ~$1500, 3x the price for the 730n I picked up.
Plus I got a extra USB from a dodge truck for the glove box and still have the one in the console.
I only had to rewire the microphone for the uconnect to work flawlessly.

Again, my opinion, and as always YMMV
12-27-2012 02:45 PM
Nextgen
Quote:
Originally Posted by MaskMan View Post
If you have already blown the stock sub it sounds like you really need bigger/more subs and more power than the sad little 8 incher.

If the box is the same basic one as the Infinity (don't see why it is not) you have about 4" mounting depth.

One of the best shallower mount subs, at least excursion wise, is the Polk MM840.
There are two versions, single VC 4ohm and dual 4ohm, I believe you want the DVC.
They sound good but need power to shine. Box size requirements is similar to OEM.

Others are Kicker CVT, Punch P3SD4-8, and I think that the JL 8w1 fit.
A JL 8w3 and others will fit with a spacer ring.

Again you will blow any of these subs too if you do not get more power.
Power does not blow speakers (unless stupid over powering) distortion does.
Thanks for that info. I think I'll just end up taking the whole enclosure out and ordering that side panel from the stealership. Then I'll add either two 10'' or one 12'' sub(s), new amplifier, and those Mopar Kicker sound bar speakers from Qtec. Do you think I'd really benefit from replacing the stock head unit? I'm clueless when it comes to car audio.
12-27-2012 01:31 PM
MaskMan If you have already blown the stock sub it sounds like you really need bigger/more subs and more power than the sad little 8 incher.

If the box is the same basic one as the Infinity (don't see why it is not) you have about 4" mounting depth.

One of the best shallower mount subs, at least excursion wise, is the Polk MM840.
There are two versions, single VC 4ohm and dual 4ohm, I believe you want the DVC.
They sound good but need power to shine. Box size requirements is similar to OEM.

Others are Kicker CVT, Punch P3SD4-8, and I think that the JL 8w1 fit.
A JL 8w3 and others will fit with a spacer ring.

Again you will blow any of these subs too if you do not get more power.
Power does not blow speakers (unless stupid over powering) distortion does.
12-27-2012 12:16 PM
Nextgen
'13 JK stock sub replacement

Does anyone know of any aftermarket subs that fit in the stock sub enclosure? Mine is already making a 'popping' noise and I doubt that's covered under warrenty, so I'm just going to replace it. Thanks!

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