18" Fi SP4 setup help

Yes and the more u plan for now the more happy u will be with it..im not sayin u cant fit a 18 im just trying to help u account for optimal enclosure size plus putting the amp wires and extra battery back there too 

---------- Post added at 01:22 PM ---------- Previous post was at 01:21 PM ----------

 

Yes firing up is the only option sup up port back
I would love to be able to design my own enclosure rather than the local place to do it. I would build my own, but I don't have the tools or knowledge to do so.. yet. No one I know personally is into Car Audio so i've been trying to learn on my own. **** it's difficult. Just a general question, With the trunk rattle, What is the best way to stop that? With my 2 12s it rattles like a mother.

 
U got a good start and picking good equipment so ur not totally off track ..i ran the bc3500 on a pair of dd3512s before this .its a nice amp..i dont like the sp4 due to the fact ive seen many catch fire,, yes i saod catch fire in person ol
I was looking for a sub with a low Fs mainly, I don't know if that was stupid of me or not. I LOVE ~30Hz bass. I want a system that can handle that with no problem. My JLs can do ~30Hz, but not with the bass you can feel. Like I know its doing it, but I can't feel it anywhere near what like 37Hz is like.

 
U got a good start and picking good equipment so ur not totally off track ..i ran the bc3500 on a pair of dd3512s before this .its a nice amp..i dont like the sp4 due to the fact ive seen many catch fire,, yes i saod catch fire in person ol
Ok, so if the SP4 isn't so good, What is a good sub for super lowend, similar to how the SP4 is.

 
I would love to be able to design my own enclosure rather than the local place to do it. I would build my own, but I don't have the tools or knowledge to do so.. yet. No one I know personally is into Car Audio so i've been trying to learn on my own. **** it's difficult. Just a general question, With the trunk rattle, What is the best way to stop that? With my 2 12s it rattles like a mother.
Properly deaden it with mvl ccf cld tiles etc.and a guy on maf.com named dcarcustoms designs boxes and will give u blueprints for 10 bucks ..great guy

 
Ok, so if the SP4 isn't so good, What is a good sub for super lowend, similar to how the SP4 is.
Some pll have had good luck with them ive just got a bad taste of them from what ive seen...to be honest the box design plays a way bigger role in what the namdwith is than the sub does ..take for intstance my hdc4s ppl say all they time they dont play low blah blah ..and u saw the video lol and they have a fs of 43..

 
Properly deaden it with mvl ccf cld tiles etc.and a guy on maf.com named dcarcustoms designs boxes and will give u blueprints for 10 bucks ..great guy
That actually was the same idea I had, is to have someone like that build box designs and they have them build it to the exact specs.

 
Some pll have had good luck with them ive just got a bad taste of them from what ive seen...to be honest the box design plays a way bigger role in what the namdwith is than the sub does ..take for intstance my hdc4s ppl say all they time they dont play low blah blah ..and u saw the video lol and they have a fs of 43..
My very original sub I wanted was a DD sub. Then it switched to this and then that etc etc. I guess I could get the SP4, hey worst case scenario I hate it or I suppose it could ignite my car.

 
That actually was the same idea I had, is to have someone like that build box designs and they have them build it to the exact specs.
He will give u exact specs u can take to someone to build

 

---------- Post added at 01:52 PM ---------- Previous post was at 01:51 PM ----------

 

Before i did and deadning i used spray foam in between the 2 layers of metal

 
My very original sub I wanted was a DD sub. Then it switched to this and then that etc etc. I guess I could get the SP4, hey worst case scenario I hate it or I suppose it could ignite my car.
Yea it will fill the car with smoke if it goes lol ..but ur gina have the same issue if ur set on a 18 as they all need 6 cubes at the very very smallest..there are alot of good ones out there tho

 
Yea it will fill the car with smoke if it goes lol ..but ur gina have the same issue if ur set on a 18 as they all need 6 cubes at the very very smallest..there are alot of good ones out there tho
What it all boils down to is, I want a system like mine (JL 12s) but with a lot more bass, I like that the jls have what I would call "smooth" bass, I heard a guys 2 American Bass 12s and it was really rough and rumbled and I didn't like it at all.

 
What it all boils down to is, I want a system like mine (JL 12s) but with a lot more bass, I like that the jls have what I would call "smooth" bass, I heard a guys 2 American Bass 12s and it was really rough and rumbled and I didn't like it at all.
Its really hard to say because u are going up into a whole other power level and things are gona rattle and shake like youve never had before

 
Its really hard to say because u are going up into a whole other power level and things are gona rattle and shake like youve never had before
I do see what your saying, but he was running same power I was. It sounded SO different, that is something I'm scared of is that I wont like the kind of bass that it produces.

 
I run HDC3 18"s and I'm tuned to 35hz. They still get down at 24hz. I would not try and shove an 18" in your truck. Two 12"s is what I would do in a trunk car.

Go with 2 Sundown Zv4s or Xs if you want lows.


 
Activity
No one is currently typing a reply...
Old Thread: Please note, there have been no replies in this thread for over 3 years!
Content in this thread may no longer be relevant.
Perhaps it would be better to start a new thread instead.

About this thread

CplCuddles

Certified Meme Warrior
Thread starter
CplCuddles
Joined
Location
Topeka, KS
Start date
Participants
Who Replied
Replies
91
Views
6,404
Last reply date
Last reply from
CplCuddles
IMG_20260516_193114554_HDR.jpg

sherbanater

    May 16, 2026
  • 0
  • 0
IMG_20260516_192955471_HDR.jpg

sherbanater

    May 16, 2026
  • 0
  • 0

New threads

Top