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  1. If I am going to run two positive runs front to back should I also upgrade the big three from one to two runs also?
  2. An old schooler I talked to recently says that when you have the big 3 upgrade, high output alt and a bank in the trunk that your alt will die sooner from being taxed too much in comparison to no big 3 and power/grounds running straight from alt to the bank. I have always been told to do the big 3 so I have never heard this new stuff in my life and figured if anyone else knew about this, it would be on this site and why I'm asking here.
  3. Here is a very crude drawing of what I have in my head for the layout of the electrical portion of my system. Laughing is welcome. Lol. I have everything from the hood up to the trunk done as far as electrical goes... This is about everything from there back. All wire is 1/0 skyhigh OFC, 300a JS alt, 3 xp3000's, sundown ns1, 2 zv5 12s . The questions are these: 1. Do I need to run a ground to the frame for each battery in the bank or just tie them together as shown in the picture with 1 ground run going to the frame? 2. Since my amp has three power inputs, do I need to run 3 power wires from the battery bank to the distro then 3 runs to amp OR is the 1 run going from the bank to the distro then 3 runs to the amp in the picture enough? 3. Same goes for grounds. There are three ground inputs. Do I need to run 3 grounds from the bank to the amp and then run 3 grounds from the bank to the frame OR will 3 runs from the bank to the amp and then 1 ground to the frame from the bank be enough? If the answers are yes I do need to match the 3 power/grounds from the amp then... 4. Do I need to run 3 power/ground runs each between each battery in the bank as well? Since my box is taking up the entire trunk space (have to build in trunk), I will be putting the battery bank in the spare tire wheel well. I will not be able to access the batteries after I build the box. This is why I am trying to find all of this out before I can actually test the system electrical. All input is welcome. If anyone notices anything else wrong please chime in. Thanks!
  4. I have read on here that it is recommended to use half the cone area for determining port area. If I was to do it that way, the port area would then be around 113 not 70-80 and my port would be 10.5 x 10.5 x 20.5 in order to get tuned to 45hz I got that number from the surface area of 2 12s = 226.19 then divided by 2 = 113. Is this correct thinking? I dont know necessarily know if the person who posted that thread knew what they were talking about or not. It was on this forum though. Dont remember the exact thread atm. Been reading a lot the past few days so I can lock down this design.
  5. Ok one last thing. If these subs require 80sq in of port area as a pair then would that apply the same to the port on the 4th? I've seen a lot of setups with big window port openings at like 12 x 20.for example. Should I still make sure its 80sq in of area or just make it as large as it needs to be tuned at 45hz? There is obviously no port walls needed but the opening size is what I am referring to. I hope I am explaining this correct.
  6. I understand how much more output it will give me. That wasn't the question. I am trying this 4th order design because I know how much more output it will give. What I was wondering is will the 4th still be able to play down into the 20s like the slotted design will that I posted? I'm sorry, I probably should have explained that better.
  7. Yeah the orange was my first design on another thread on here that you actually also gave me input for. I began this thread trying to see if I could get the same or better than that from a 4th. The only thing for me I guess that I cant get ahold of is how low of lows the 4th will play. The orange slotted @31 will play to 26hz. Will the 4th reach that low from what I graphed out? (2.5 sealed 5 ported @45hz)
  8. I have been playing around with winisd and came up with a few things. Yellow is 4th order @ 45hz 2 sealed 5 ported. The way the graph looks seems like I'd be losing out on a lot of bottom end unless this is just modeling the ported side? On a side note... The other two colors on the graph are a orange slotted box @31hz 5 cubes and blue slotted box @28hz 5 cubes. Do the air velocities for the two slotted box ideas seem a bit high? If I went just slotted and went by sundown specs they want a max 40sq inches per sub so 80 for both. How can I get that down without going over 80sq inches of port cross area?
  9. Is that 2.5 sealed per sub or total? Going to throw this into winisd and see what I can come up with. You guys are awesome.
  10. I'd be running 2 zv5 12s on a ns1. I'd like to be in a good range of 25 to 50hz if that's possible.
  11. Thank you sir. Would it be beneficial to the low end by increasing the sealed size per sub without raising the chance in damaging the subs because of over excursion?
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