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Old 12-09-2011, 08:45 AM   #1
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Subwoofer Questions

So I am thinking of buying a subwoofer and building a box for it to fit in the back of my jeep, while keeping the back seat. I wanted to know what is the best idea for a sub and amp for that size. Where should i put the amp? what kind of material should i use to build the box? Will weather affect the box (I live in California with a soft top, water could get in the back)?

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Old 12-09-2011, 09:13 AM   #2
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Sub & amp size is personal preference. Build the box out of 3/4" mdf. As far as the box getting wet I used spray on truck bed liner. It works really good to keep moisture out of the mdf.

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Old 12-09-2011, 09:16 AM   #3
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Sub & amp size is personal preference. Build the box out of 3/4" mdf. As far as the box getting wet I used spray on truck bed liner. It works really good to keep moisture out of the mdf.
x2. There are a million articles on here about custom sub boxes, try the search
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Old 12-09-2011, 09:21 AM   #4
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I had two tens. Bought a box off eBay for $50

Speakers facing down is key.
Sounds great even with the top down.
Doesn't take a lot to power 2 10's
A 300 2/1 channel amp is fine.
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Old 12-09-2011, 10:47 AM   #5
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I prefer 8" or 10" subs. I like one reasonably powered 10" so I don't loose the space two 8s (or two of anything) would take. "Reasonably powered" is in the ear of the beholder, but my definition is at least 300watts rms. Keep in mind, two 150watt subs does not equal one 300watt. Two 150w subs still only handle 150w; they just move twice the air as one.

What you go with is entirely up to you though. You have to figure out what you need and what will work for you.
A 10" gives you a woofer size that will move some air, and is capable of tight bass response. With enough power, there is no need for more than one; especially in a Wrangler.

Whatever you do for the enclosure, downfiring is the ideal setup in a Wrangler.

Use 3/4" MDF for construction. Hold together with wood glue and nails/screws. Seal with liquid nails and/or caulk.

Cover in an outdoor carpet or spray/roll-on bedliner.

I have posted these pics a few times lately, but this is the enclosure I built recently....











For the amp, under the backseat is a decent location for it if it is larger. If it is smaller, you can mount it under the steering column for a completely hidden and weather-proof location.
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Old 12-09-2011, 11:09 AM   #6
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I have a box for 1 10" that fits snuggly between the back seat (well, a cage behind the back seat) and the tailgate. I will try to get a pic today or tomorrow for you. The speaker faces the back seat and sounds great.
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Old 12-09-2011, 12:18 PM   #7
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Old 12-09-2011, 12:50 PM   #8
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Thats pretty neat. Which one fits under the seat? 10"? Do you personal have one?
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Old 12-09-2011, 02:32 PM   #9
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Those suck
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Old 12-09-2011, 03:58 PM   #10
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Agreed
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Old 12-09-2011, 04:30 PM   #11
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Old 12-09-2011, 05:36 PM   #12
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I put in two 12's with a 900 Watt rms amp. The box I made takes up the whole area behind the back seat & is a snug fit. Its nice for going to & from work but I can take them out very easily if going to off road & need the extra room. This picture was before I put the back seat in.
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Old 12-09-2011, 07:19 PM   #13
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I've owned a Kenwood that had a 6" driver and a 6" passive radiator in the same enclosure. It fit under the seat of my '97 Sport and it was fantastic. The model I had is no longer made. Full disclosure; I only listen to music played on instruments and not programmed rythymes generated by drum machines and sound modules. I doubt the powered compact subs will reproduce 30-60 Hz sine waves, but they do quite well with bass guitar and mic'd acoustic drums.
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Old 12-09-2011, 07:33 PM   #14
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Also can you get a bass level control that mounts somewhere near the front? how would you do that?
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Old 12-09-2011, 08:27 PM   #15
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Originally Posted by LouieDelTorchio
Also can you get a bass level control that mounts somewhere near the front? how would you do that?
It would have to be an option on your amp
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Old 12-10-2011, 02:38 AM   #16
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what do you do about keeping it dry incase of rain
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Old 12-10-2011, 07:42 PM   #17
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Originally Posted by TXST8tj View Post
I prefer 8" or 10" subs. I like one reasonably powered 10" so I don't loose the space two 8s (or two of anything) would take. "Reasonably powered" is in the ear of the beholder, but my definition is at least 300watts rms. Keep in mind, two 150watt subs does not equal one 300watt. Two 150w subs still only handle 150w; they just move twice the air as one.

What you go with is entirely up to you though. You have to figure out what you need and what will work for you.
A 10" gives you a woofer size that will move some air, and is capable of tight bass response. With enough power, there is no need for more than one; especially in a Wrangler.

Whatever you do for the enclosure, downfiring is the ideal setup in a Wrangler.

Use 3/4" MDF for construction. Hold together with wood glue and nails/screws. Seal with liquid nails and/or caulk.

Cover in an outdoor carpet or spray/roll-on bedliner.

I have posted these pics a few times lately, but this is the enclosure I built recently....











For the amp, under the backseat is a decent location for it if it is larger. If it is smaller, you can mount it under the steering column for a completely hidden and weather-proof location.
Nice work

I have a two 12" behind my rear seat. I used a "outdoor carpet" to wrap it. Fits snug.
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Old 12-10-2011, 09:08 PM   #18
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Lucky enough the guy I baught my jeep off of that a full stereo system installed.

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Old 12-11-2011, 10:34 AM   #19
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I put a Sony 10" sub that came with a slim- under seat box behind the rear seat and mounted the amp to the back of the box. The amp is a Polk marine grade amp that's small as well. I put then both together because whenever I go wheelin(mall-crawling) I can remove the fuse under the hood and take both of em out. Works great and sounds good.
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Old 12-11-2011, 11:03 AM   #20
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what is better downward firing subs or to the back of the seat.
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Old 12-11-2011, 12:02 PM   #21
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From what I've heard downfiring is ideal.
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Old 12-12-2011, 08:05 AM   #22
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I have had a few requests for the measurements of my trunk/enclosure, so I thought I would post them in this thread (I'll probably also put them in my own build thread). I didn't realize that I missed some key measurements until I started drawing these up.

I owe the measure for the depth of the cutout on the "outside enclosure wall" and the measurements for the back piece. (If you do all the other pieces, you can come up with the back piece. I also owe the measurements for the bottom piece where the sub is mounted.

These are good to start though.

*Material used is 3/4" MDF and these are measurements for individual pieces (not drawn to scale)







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Old 01-01-2012, 10:22 PM   #23
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i have a box for 2 10's.. ebay for $100..and get a SMALL amp
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Old 01-04-2012, 12:00 AM   #24
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what is better downward firing subs or to the back of the seat.
I've used singles/dual sub set-ups fired into the seat, tailgate, and down firing. To my ear the best option was down firing. I could also "feel" the bass more this way.

In fairness, I think that because of space limits the cone movement may have been hampered because of the size of the enclosures. Always seemed like things were in there a bit too snug. But I guess that's more support for down firing those subs.

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