system ain't thumpin


what do

  • switch to spl sub

    Votes: 0 0.0%
  • bigger amp

    Votes: 0 0.0%
  • extra battery bank

    Votes: 0 0.0%
  • bigger sub

    Votes: 0 0.0%

  • Total voters
    0

minicorndog

CarAudio.com Recruit
Jan 7, 2021
57
16
California
what do?

can't build custom box, rocking the skar prefab 15" box wired at 1 ohm. will switching subs make a difference? or do I need to upgrade size as well?
I had a ported 10 (same model) that was rattling my rear view mirror to where I couldnt see out of it and with this 15 it barely even thumps. more like a buzz.

much love. peace

ps. yes rocking the big 3 with a battery in the trunk.

edit: ssa XCON 15d2 on sundown 1500 amp with a RocFosgate 400 pushing the doors

looking at soundqubed hds3.2 or american bass subs loosely
 
Last edited:

minicorndog

CarAudio.com Recruit
Jan 7, 2021
57
16
California
  • Thread Starter Thread Starter
  • #3
my fault, I should've mentioned I was looking at the soundqubed hds3.2 and american bass elite
 

Coolhand20th

CarAudio.com Elite
Mar 27, 2019
1,437
407
Wisconsin
That Xcon needs at least 1750 watts RMS to move it correctly. While the amplifier you have is good a Sundown SFB is a great amp but it isn't enough to get that 15" Xcon. That Xcon will really thump when you have the power to it especially in the correct box. You can go to Home Depot or any number of places if you buy the wood from them and they will cut the wood to your specifications if you pay them a small fee. Then you just have to glue it and screw it down. I would seriously contact @Buck and have him do you up a design for it. And get a bigger amplifier.
 

Buck

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What size is your alt? You need a good box man, it doesn't matter what sub you have, if your box *****, your whole system *****. You have good equipment. You can't put subs like that in prefab boxes, that's a shame. I can get you a box shipped, but it's gonna cost you. We can also do cuts where you assemble the cuts, if you're interested.
 

Buck

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Post ALL of your info up, box size, what ohm your amp is seeing from your sub, what size your alt is, your wiring, everything like that, voltage preouts from the head unit. Anything you can think of
 

minicorndog

CarAudio.com Recruit
Jan 7, 2021
57
16
California
  • Thread Starter Thread Starter
  • #8
That Xcon needs at least 1750 watts RMS to move it correctly.
I appreciate the love, man. you posted up exactly what I was afraid of. my stock alt pumps out 150amps. I was looking at a taramps smart 3k for the sub too or the new jp23 off down4soundaudio. but I'm already pumping out 1900 watts and I doubt my alt would keep up...
I'm hoping that's where you guys come in.

good looking out pointing me to @Buck. I have to make sure my priorities are straight tho and it's looking like my electrical is choking the sub
 

minicorndog

CarAudio.com Recruit
Jan 7, 2021
57
16
California
  • Thread Starter Thread Starter
  • #10
Post ALL of your info up. Anything you can think of
I appreciate it. my stock alt pumps out 150amps. pushing thru the big 3 with a battery in the trunk. looking to open bottlenecks up one at a time while avoiding as many diminishing returns as possible..
besides that I'm stock.

1ohm wiring for the sub

box is a prefab from skar audio. specs tuned at 31hz with 3.85 cubic feet.
 

Coolhand20th

CarAudio.com Elite
Mar 27, 2019
1,437
407
Wisconsin
Big 3 will help in 1/0 OFC or 1/0 Welding cable along with the correct ported box. Buck knows what he is doing as he has done several hundred if not more custom boxes.

Those 2 things will really help and improve things along with the right amplifier. Idk what exact Sundown you have but the 2k SFB puts out more then they are rated for and are not bad in price from Apex Car Audio as they are in the same building now or right next door to them so they have them in stock all the time. As they run "B" Stock with 1 year warranty on them for much cheaper then the so called "A" stock. The 3k is available as well in the "B"stock. They really are nice amplifiers.



SFB-2000D dyno test, 2,543 at 13.9 volts certified at 1ohm.

 
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mastershake575

CarAudio.com Veteran
Mar 11, 2015
596
128
Dallas
I'm leaning towards the box being the issue or the sub accidently being wired to 4ohms instead of 1. I've seen XCONS on lower power shake windshield wipers. No way a 15 inch XCON on 1500 watts should be lacking thump
 
Last edited:

Buck

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I appreciate it. my stock alt pumps out 150amps. pushing thru the big 3 with a battery in the trunk. looking to open bottlenecks up one at a time while avoiding as many diminishing returns as possible..
besides that I'm stock.

1ohm wiring for the sub

box is a prefab from skar audio. specs tuned at 31hz with 3.85 cubic feet.
post a link to the box. idk if i trust those specs, that box should be loud, if those specs are correct. i'm truly interested to reverse engineer their box some, to see if it's accurate or not, because skar reasons.
 

Coolhand20th

CarAudio.com Elite
Mar 27, 2019
1,437
407
Wisconsin
He posted a link a couple posts above yours. 1,500 watts should move it you would think. Unless it is also setup wrong. And yeah I think that box is garbage. Skar Boxes are not the best quality. Then again is anything from Skar good? lol
 

minicorndog

CarAudio.com Recruit
Jan 7, 2021
57
16
California
  • Thread Starter Thread Starter
  • #17
Big 3 will help in 1/0 OFC or 1/0 Welding cable along with the correct ported box. Buck knows what he is doing as he has done several hundred if not more custom boxes.

Those 2 things will really help and improve things along with the right amplifier.

that's a great deal. the 3k looking nice.
my amp is dated, dc'd like my sub. hella reliable tho. I will prioritize that amp on my list. keeping buck in mind while my prefab holds up.
 

minicorndog

CarAudio.com Recruit
Jan 7, 2021
57
16
California
  • Thread Starter Thread Starter
  • #18
I'm leaning towards the box being the issue or the sub accidently being wired to 4ohms instead of 1. I've seen XCONS on lower power shake windshield wipers. No way a 15 inch XCON on 1500 watts should be lacking thump
i hate to admit but once i did have a sub wired to 4 ohms before and after i rewired it to 1 ohm it thumped. 🤦‍♂️ we aint stopping there tho.

edit: thumping windshield wipers? goals.
 
Last edited:

minicorndog

CarAudio.com Recruit
Jan 7, 2021
57
16
California
  • Thread Starter Thread Starter
  • #19
He posted a link a couple posts above yours. 1,500 watts should move it you would think. Unless it is also setup wrong. And yeah I think that box is garbage. Skar Boxes are not the best quality. Then again is anything from Skar good? lol
on youtube my boys say theyre good budget subs. but i wont derail the topic.

appreciate all the looking out. i'll look into upgrading amp and box to get the most out of my sub before deciding if it lacks potential or not.
 
Last edited:

Buck

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I don't think that box is 3.8xx whatever cubes after sub and port displacement. Big red flag is putting polyfill in a box. Good boxes don't need polyfill, for car audio subwoofer. It does have a proper application, but show me one competitor that runs polyfill in their box.

If you want OP, measure the top depth, bottom depth, width and height of that enclosure, and well as the port height and width.

Look at the Icon 15 box I did, and look at the size difference. Let me see if I can find it.
 

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