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    1. · Premium Member
      2000 Ford Excursion
      Joined
      ·
      28 Posts
      Discussion Starter · #25 ·
      TL;DR: ~0.67 ft³ for the 2000-2005 Ford Excursion Stealthbox, with a feeble attempt at polyfill and ~3/8" ABS baffle (might be closer to 11/32"). Overall mounting depth is ~6-9/16". I'm not sure what, if any, variability there is to that, since it's mostly fiberglass.

      For the curious minds, I put together a few photos showing how I derived my results.

      First, the Stealthbox itself:



      Next, I removed the 10W3v3. 8 #2 Phillips screws, about 1" long.





      The speaker wire isn't anything to write home about. JL runs it through a foam tube, presumably so it won't rattle against any surfaces. The polyfill was just a small sheet sitting directly behind where the woofer mounts. I would've figured they'd polyfill the whole box, but I'm not the engineer here.



      Now, for the measurement. I purchased Bean Bag Filling 2 Cubic ft. blah blah blah from Amazon for $20. It's way more than enough for this little project. As you can see, it's just riveting, pouring styrofoam balls into a box on a random Thursday night.




      As I poured them in, I periodically stopped and moved them towards the extremities of the box, particularly toward the end as thing were getting full. I wanted to ensure they were genuinely filling up the entire volume.




      Then I transferred the contents to a box I had leftover from an Amazon delivery. It measured 12x16 internally. I got every last peanut out of that damned enclosure, then put my tape measure in and ensured it was bottomed out against the cardboard without any peanuts sitting under the end. Then I smoothed everything down and pressed it modestly, just like I did when filling the enclosure and pushing the peanuts to the internal extremities. I wanted to replicate the circumstances as much as possible between one and the other.

      Overall, the depth measured approximately 6".
      12 x 16 x 6 = 1,152 ÷ 1,728 = ~0.67



      The 10W3v3-2 is, per JL's website, "is optimized to operate in a compact 0.625 cu. ft. (17.7 l) sealed enclosure..." so it's more or less right where it needs to be.

      I think in the long term I'll end up with an Illusion C10XL or BM MKV, but at least we've figured the depth and put to bed the whole question of whether or not JL gave the woofer the spec'd volume. As it is, the driver fits pretty snug between the included mounts, but there's still plenty of meat in all other directions. Anyone who's halfway handy with metal fab could easily create some different mounting brackets which would open up the possibility for a 12".
       

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    2. · Registered
      Joined
      ·
      2,443 Posts
      TL;DR: ~0.67 ft³ for the 2000-2005 Ford Excursion Stealthbox, with a feeble attempt at polyfill and ~3/8" ABS baffle (might be closer to 11/32"). Overall mounting depth is ~6-9/16". I'm not sure what, if any, variability there is to that, since it's mostly fiberglass.

      For the curious minds, I put together a few photos showing how I derived my results.

      First, the Stealthbox itself:

      View attachment 316896

      Next, I removed the 10W3v3. 8 #2 Phillips screws, about 1" long.



      View attachment 316899

      The speaker wire isn't anything to write home about. JL runs it through a foam tube, presumably so it won't rattle against any surfaces. The polyfill was just a small sheet sitting directly behind where the woofer mounts. I would've figured they'd polyfill the whole box, but I'm not the engineer here.
      View attachment 316900
      View attachment 316907

      Now, for the measurement. I purchased Bean Bag Filling 2 Cubic ft. blah blah blah from Amazon for $20. It's way more than enough for this little project. As you can see, it's just riveting, pouring styrofoam balls into a box on a random Thursday night.

      View attachment 316906
      View attachment 316902

      As I poured them in, I periodically stopped and moved them towards the extremities of the box, particularly toward the end as thing were getting full. I wanted to ensure they were genuinely filling up the entire volume.

      View attachment 316903
      View attachment 316904

      Then I transferred the contents to a box I had leftover from an Amazon delivery. It measured 12x16 internally. I got every last peanut out of that damned enclosure, then put my tape measure in and ensured it was bottomed out against the cardboard without any peanuts sitting under the end. Then I smoothed everything down and pressed it modestly, just like I did when filling the enclosure and pushing the peanuts to the internal extremities. I wanted to replicate the circumstances as much as possible between one and the other.

      Overall, the depth measured approximately 6".
      12 x 16 x 6 = 1,152 ÷ 1,728 = ~0.67

      View attachment 316905

      The 10W3v3-2 is, per JL's website, "is optimized to operate in a compact 0.625 cu. ft. (17.7 l) sealed enclosure..." so it's more or less right where it needs to be.

      I think in the long term I'll end up with an Illusion C10XL or BM MKV, but at least we've figured the depth and put to bed the whole question of whether or not JL gave the woofer the spec'd volume. As it is, the driver fits pretty snug between the included mounts, but there's still plenty of meat in all other directions. Anyone who's halfway handy with metal fab could easily create some different mounting brackets which would open up the possibility for a 12".
      FWIW - JL Audio specs their woofers around 0.9 Qts for car audio. If you measure the woofer with DATS (or use published T/S) and plug it in to your favorite modeling software you'll find that it "wants" a much larger enclosure. All of that to say that most manufacturers will spec their drivers for closer to 0.7 (re: Illusion, etc.) so it will likely sound very different with another woofer that specs closer to the measured volume.

      Sent from my SM-G965U using Tapatalk
       

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