4th order

I have 9 crossfire c3 12s in a Honda Pilot and I want to go walled with a 4th. I am very experienced in everything but bandpass boxes. I want to build something with good bandwidth 20-50 range but I want it to get really windy on the lows. I have designed a wall with based on what I know (8.25...

First would like to say I’m new here and getting back into audio. Used to be in caco and I’ve noticed a lot of the forums died. Hope this one hasn’t.  What parameters do I choose for a custom built subwoofer? I am having a Skar Audio ZVX 15 recone being built that will put it in line with...

Vehicle : Kia Forte Coup (2016) Location in the vehicle: Trunk Space available (Length x Width x Height): 28, 27,14 Subwoofer make and model: skar VVX version 3 Subwoofer Size:12 Number of Subwoofers:2 Type of Port (Kerfed, Slot, Aero, etc.):Aero single 6inch flared What type of music do...

Subs are getting shipped this week, and I need to decide on an enclosure for sure. I have 50 more yards of fiberglass coming. I currently have 5 gallons of resin, 25 feet of fiberglass cloth, a sheet of 4'x8' birch plywood, a few 2x4's, screws, and threaded 1" metal pipe. Going to buy 1 or two...

I'll soon be building a C-Pillar 4th order for (4) Zv4 12" Rev. 1s on (4) DD M3bs in an '08 Chevy Trailblazer. I've already decided on a 2:1 ratio, but I'm having trouble finding accurate info for my sealed section. Some have said 1.5 cubes per while others have said 1.25 cubes per. So, I open...

So I'm the next 2 weeks I'll be getting either a c10 or a z71. The plan was to do 2 18" XFLs on a crescendo BC2250D I think it was. Then 2 8" PWXs and crescendo tweeters then a 320 mechman. And put the subs in a 4th order. The whole this came up to just over 2000. Half of what the truck will...

so heres the deal, i can go blowthrough or i can do a box in the ext cab area of a pickup. vehicle is not decided yet but its a standard bed. i would be doing i think either a 4th order. now i need to be able to haul a sport fourwheeler in the bed. how can this be accomplished?

im trying to wrap my head around how to build a 4th order box, but it seems the more i read the more im second guessing things. my question where do i start on designing a box, what factors do i need to consider? i have 24 cubic feet to work with before woofer, bracing, and port displacement...