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"Shadow" 2016 Jeep Wrangler JK/4th Order/(4) 8's/DC 3.5K/Large Case Hairpin US Alts


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I've been helping a buddy install a system in his 2016 Jeep Wrangler JK.  I finally have enough pics to start a build log, so I'll be loading all of them up over the next couple weeks.

The requirements were simple: he wanted (4) 8's or nothing at all.  Silly?  Maybe; but we met the requirements and hope to be banging before the end of the year :)

The stock sub (an 8x10) has 4 voice coils

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Ran some numbers in TermLab at first, but then switched the design over to WinISD.  Came up with this size enclosure:

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That router feels good man

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Went with PSI-8's with High Performance suspension for 600Wrms per sub

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We were jammin some of that good techno

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The original plan was to have a few tube ports, but I had a hunch that they were too small.  Thats about the time that Triticum came out with his port velocity calculator, and I realized the port velocities with these small ports would give me the tuning we were wanting, but also gave us almost 100 m/s port velocity (yikes!)

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Then the design changed to have a properly sized port attached to the back panel, bringing the velocities down to around 25-30 m/s

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I didnt really trust my kerf skills yet

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More pics coming tomorrow.  Thanks for looking!

 

Chevy Sonic Wall (4) 15's on 10k Build Log

https://www.stevemeadedesigns.com/board/topic/209412-2015-chevy-sonicwall4-15s10klithiumlarge-case-hairpin-us-alts/

(4) Fi SP4 15's | (2) Ampere 5Ks | Active! | Arc KS600.2 & KS125.2mini | CDT Silk Domes | Silver Flute 8s | 240Ah JY | US Alts

Jeep Wrangler JK (4) 8's in a 4th Order Build Log

https://www.stevemeadedesigns.com/board/topic/209841-shadow-2016-jeep-wrangler-jk4th-order4-8sdc-35klarge-case-hairpin-us-alts/

IG @walledsonic

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Continuing on...

Here's how the back would fit

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Made an insulated standoff for the sub leads inside the box

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Then we threw the subs on a power supply in the spare bedroom (aka the basslab haha)

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Got our hands on a PAC AmpPro for the Chrysler/Jeep/Dodge with upgraded stock systems.  We could've went with a new head unit, but figured we'd go the stealth stock route first

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Back to the box work.  Forstner bits are awesome.  Such clean cuts

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Jigsaw action

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Wait, whats going on there?  It seems the router is involved...

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hmmmm

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We're kinda obsessed with Dark Walnut stain

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More tmrw!

Chevy Sonic Wall (4) 15's on 10k Build Log

https://www.stevemeadedesigns.com/board/topic/209412-2015-chevy-sonicwall4-15s10klithiumlarge-case-hairpin-us-alts/

(4) Fi SP4 15's | (2) Ampere 5Ks | Active! | Arc KS600.2 & KS125.2mini | CDT Silk Domes | Silver Flute 8s | 240Ah JY | US Alts

Jeep Wrangler JK (4) 8's in a 4th Order Build Log

https://www.stevemeadedesigns.com/board/topic/209841-shadow-2016-jeep-wrangler-jk4th-order4-8sdc-35klarge-case-hairpin-us-alts/

IG @walledsonic

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Also, heres the amp thats going to power those 8s.  AMP GUTS.

 

Chevy Sonic Wall (4) 15's on 10k Build Log

https://www.stevemeadedesigns.com/board/topic/209412-2015-chevy-sonicwall4-15s10klithiumlarge-case-hairpin-us-alts/

(4) Fi SP4 15's | (2) Ampere 5Ks | Active! | Arc KS600.2 & KS125.2mini | CDT Silk Domes | Silver Flute 8s | 240Ah JY | US Alts

Jeep Wrangler JK (4) 8's in a 4th Order Build Log

https://www.stevemeadedesigns.com/board/topic/209841-shadow-2016-jeep-wrangler-jk4th-order4-8sdc-35klarge-case-hairpin-us-alts/

IG @walledsonic

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Gotta layer up the clear on top of that stain...

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Cats outta the bag now... 1/2" polycarbonate (NOT acrylic, this is many times stronger)

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Using E6000 to secure the sheet to the wood, but then using PL 3X and screws to sandwich the two boards together.

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Chevy Sonic Wall (4) 15's on 10k Build Log

https://www.stevemeadedesigns.com/board/topic/209412-2015-chevy-sonicwall4-15s10klithiumlarge-case-hairpin-us-alts/

(4) Fi SP4 15's | (2) Ampere 5Ks | Active! | Arc KS600.2 & KS125.2mini | CDT Silk Domes | Silver Flute 8s | 240Ah JY | US Alts

Jeep Wrangler JK (4) 8's in a 4th Order Build Log

https://www.stevemeadedesigns.com/board/topic/209841-shadow-2016-jeep-wrangler-jk4th-order4-8sdc-35klarge-case-hairpin-us-alts/

IG @walledsonic

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4/0 for all power and ground runs ?

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Lets talk electrical.  The Jeep comes with a small case hairpin Denso alternator.

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So I went to the Jeep dealership, had them pull the stock alternator, and then I took the measurements I needed so I can custom fab an alt bracket for a large case hairpin Denso GM modular case alt.  Hole to hole spacing is 148mm

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Hole diameter is 10mm

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Ordered a 250A hot (280 peak) alt from @Bump4life at US Alternators!

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Except this one has a Chrysler PCM connector :)

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We already took measurements under the hood of the offset between the 2 alternators.  Alternator install coming very soon. 

Chevy Sonic Wall (4) 15's on 10k Build Log

https://www.stevemeadedesigns.com/board/topic/209412-2015-chevy-sonicwall4-15s10klithiumlarge-case-hairpin-us-alts/

(4) Fi SP4 15's | (2) Ampere 5Ks | Active! | Arc KS600.2 & KS125.2mini | CDT Silk Domes | Silver Flute 8s | 240Ah JY | US Alts

Jeep Wrangler JK (4) 8's in a 4th Order Build Log

https://www.stevemeadedesigns.com/board/topic/209841-shadow-2016-jeep-wrangler-jk4th-order4-8sdc-35klarge-case-hairpin-us-alts/

IG @walledsonic

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Almost finished deadening the rear floor area.

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Inside of the port

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Chevy Sonic Wall (4) 15's on 10k Build Log

https://www.stevemeadedesigns.com/board/topic/209412-2015-chevy-sonicwall4-15s10klithiumlarge-case-hairpin-us-alts/

(4) Fi SP4 15's | (2) Ampere 5Ks | Active! | Arc KS600.2 & KS125.2mini | CDT Silk Domes | Silver Flute 8s | 240Ah JY | US Alts

Jeep Wrangler JK (4) 8's in a 4th Order Build Log

https://www.stevemeadedesigns.com/board/topic/209841-shadow-2016-jeep-wrangler-jk4th-order4-8sdc-35klarge-case-hairpin-us-alts/

IG @walledsonic

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very clean work so far. looking good. tuned for more

Fidelity

Built to Last

Team Sound Asleep

24Runner Build Log: http://www.stevemeadedesigns.com/board/topic/196657-24runner-sleeper-system-lots-of-fi-neo-dd-focal-new-video-w-juicebox-lithium/

2 x 12" Fi BTL N2 / 2 x 12" Fi BTL N3

2 DD M3b

Maxwell 2.7V 3000F Supercapacitors

Pioneer DEH-80prs

Focal P165 V30 components

Rockford Fosgate T-400.4

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