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Old 07-09-2014, 07:53 AM   #1
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My custom sub box build '14 JK

I am starting on a sub install on my 2014 JKWW. I don't use the rear seat, so I am going to install a 10" RF Punch P3 on top of the wheel well behind the passenger seat.

I chose this location because I don't want to take up any space by the door, and want to keep as much of the floor free as possible.


It needs a 0.6 C.F. sealed box minimum, so that is my starting point.

I removed the carpet, and am prepping for tape:

I have taped up the entire area I am going to glass. I made some dams out of scrap sign board to contain the mess. I'm not necessarily making my box this large, but I wanted to make sure I have plenty of glass to work off of:

I didn't get any shots of the actual fiber-glassing because my hands were full and sticky, but you get the point. Here is what I pulled off the tape after it dried:

Now I need to start my MDF test fitting, and then trim the glass to the actual part I need. I will then build up the layers of glass to about 3/8" thickness.

That is all I have for now. I will update this thread as I progress.
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Old 07-09-2014, 12:37 PM   #2
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Subscribed. Keep us posted. Still looking for ideas where to put my single 10 without taking up a ton of space.

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Old 07-09-2014, 01:13 PM   #3
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Good work! I worked for a large car stereo chain for 10+ years and did several Wrangler installs. I was never much impressed with a sub in a Wrangler, simply b/c the lower the frequency the further the soundwave has to travel to "mature". Point being that most ghetto sleds we built were loud as hell from a distance but in the car you felt the bass more than hearing the bass. Another point is in home stereos you typically place a sub in a corner so that the soundwave bounces around and amplifies as it goes.

Other issue with a Wrangler is riding with the top down or even soft top up, hard tops sounded much better.

The best I've seen was the Stealthbox by JL Audio that replaced the center console in a late YJ. Sounded awesome b/c of the high quality (think it was a W3) 12" sub downfiring.

All that being said, for your application I think it will work nice. I would recommend finding a sub with a shallower mounting depth though, that RF is huge. The sub enclosure may only need to be 0.6 cubic feet but the depth will be huge (deeper than the fender) and also once you subtract the air volume that the magnet takes up the box needs to be even bigger.

The smaller the enclosure the tighter the bass, think kick drum, and it can also handle more power like that. If you are going for more of a boom sound look at porting the enclosure (needs to be larger and tuned to a specific hertz but requires less power).

And lastly I have never or had anyone else blow a speaker from too much power. It is typically distortion that blows speakers. General rule of thumb never run your head unit volume above 3/4 (if it goes to 40 don't put it past 30) b/c the internal amplifier and/or signal on the RCA jacks will distort. Also don't put the gain knob of an amp above 3/4 either and don't just assume that the knob starts at 6 o'clock so it will stop at 5:59 (while off turn knob as low as possible, then turn all the way WFO, split it in half and than split that-you are now at 3/4).

My favorite Wrangler audio system ever was in a YJ. Put some nice Boston Acoustics (BA) 4x6's in the dash and BA 6x9s in plastic boxes on front of wheel wells with an Alpine F300 4 channel small amp (45x4 RMS). Built a big box that went slightly higher than back seats and the top angled forward at a 45* angle. Mounted 4-6x9s in it on a huge Alpine MRV-1000 amp (500x1). Mounted both amps under the box (it had legs to lift it off floor about 6"). The box must have been about 6 cubic feet (12"x24"x36") so the 6x9s actually had a nice amount a bass to them but not enough to piss anyone off that wasn't standing nearby.

But damn that thing was loud and clear as hell with 6-6x9s and the 2 dash speakers! Perfect for wheeling and watching Mardi Gras parades back home.
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Old 07-09-2014, 02:50 PM   #4
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^^ Thanks for the info.

I have now installed 2 Infinity bass links in JK's for friends. They sound great (for me) top up or down. I'd do the same thing, but I need the floor space. I know this sub is huge, but I have the amp to push it, so I will make the box the exact size that I need for optimum sound.

I have a ported 12" in a 2 C.F. box with 600 watts RMS in my 94 Wrangler (no backseat either) That is what I drive when I want to blast it. This will be more of a bass adder. I'm going to do some upgrades to the soundbar speakers, maybe enlarge them with custom trim panels too. I want to see how the sub sounds first.
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Old 07-11-2014, 06:53 AM   #5
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yes,Still looking for ideas where to put my single 10 without taking up a ton of space.thanks
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Old 07-11-2014, 06:19 PM   #6
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Originally Posted by tsyj View Post
I am starting on a sub install on my 2014 JKWW. I don't use the rear seat, so I am going to install a 10" RF Punch P3
Cool, I like seeing dudes venture into custom box building. Much more creative than the square boxes out there.

Do you already have this sub? If not, take a look at the Sundown SD-2. It's a "shallow" mount 10" that needs .5 cu ft and is only 4" deep. Will take up less space and will blow away the RF P3. Essentially the same sub as their well renowned SA but with a slim motor and no pole vent. Allows mounting against the bottom of the box. I tested it against JL's expensive 10" shallow and thought it was better. It's rated at 500w but will take 600-750w+ with no sweat. No longer a "bass adder" haha
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Old 07-14-2014, 07:08 PM   #7
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Sorry for the delay in posting, I was busy getting everything built and installed.

Well, I almost screwed up. I started adding MDF to the fiberglass mold I made, and remembered that the soft top bars rest directly on the wheel well when the top is down. So I had to basically scrap the first idea and start over.

This is what I came up with.

By the time I trimmed the fiberglass down to clear the soft top bars, I had very little left to even fuss with. I wanted to keep the sub box as shallow as the stock subwoofer, so I used the cutout lines on my all weather mat as a guide.

I made cardboard templates of the wheel well and transferred it to MDF
(It's just tacked together here, don't worry about the wood fitment)

I soaked 1/4" plywood in water overnight to soften it, and glued and stapled the hell out of it on the wheel well curves. I added a few layers of fiberglass cloth on the entire back for strength.

Here it is pre-body filler after listening to it in the Jeep to make sure it sounded ok.

Body filler and sanding prepping for carpet:



And it sounds wonderful. 500w RMS is more than enough power!
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Old 07-14-2014, 07:18 PM   #8
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Looks Beautiful!!! Great job. I want one
I have a dual 10, sealed box, but it is a little tall.
down firing, behind both seats l
2011 JKUS / 3" Synergy Suspension / RR 17x9 / Duratrac 33's
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Old 03-16-2015, 11:26 AM   #9
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Damn....some people are so talented. REALLY nice looking!

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