4-12" Xcon box

[RE XXXv3 31]

Can they perform in 1.75CF3 after displacement? What is the displacement? Can a box that is .75" MDF hold 7000W? Would it be wise to put a .75" piece between 4 of these? How much port area is needed? I can do 10, 11, 12" aeroports, or two (if theres a .75 bracing between 4) 8", etc. How much port area is needed for 1.75cf3 after displacements?

I was going to use 4 sealed Eclipse SW8200's with a 3000.1, E Tech says NO ported, but I could put 1 huge aeroport through the back seat @ 47hz for SPL and insert a piece of cylindrical styrofoam for 30hz again, subs up, port into the cabin hitting the front seat divider. It would be badass if I did that but not if I could get Xcons on 7000W @ 30ish tuning sealed, and 47ish ported, right? Has anybody tried 1.75 sealed or ported? Thanks a bunch.

[Aaron Clinton 2,372]

Wow, lots of questions in one post. Welcome to SSA first off. Ok, first question, yes, 1.75 cube per 12" Xcon ported is good. Displacement for a 12" Xcon is right around .17~.18. MDF thickness, or layers holding up has nothing to do with the amount of wattage you are using, proper construction is more important. Some people use extensive bracing, some use multiple layers. If you want to do a divided chamber, that is up to you. Port area, for approx 7.0 cubes total, aim for at least 120 square inches.

Is this for SPL competition or for daily driving? I ask because 47hz is very high. If you want to seal the Xcon's to save space, that is also a great approach as people have loved them sealed.

[RE XXXv3 31]

I'll use rabbit joints so the box should hold. I already have SW8200's. For SW's 1.75 sealed = 30hz, so I want to use two aeroports sticking through the seat so when I want an SPL tune I won't have to switch anything out, I'll put a cylindrical piece of styrofoam in the ports for daily. I guessed that 47hz was my resonant frequency and it could be 45-60. I drive an Alero 4-door. I tried 2 SW's in 1.2cf3 each in my old Sunfire on 375W each and they hammer 20-30hz like its going out of style and that box was tuned around 38hz. I had one in a ported box on 750W 2.2cf3 @ 37hz and it didn't go much past 30hz, so I'm thinking I either want a sealed tune of 30hz and an SPL tune of 30hz, I could even use one sealed box @ 30 and the other at 40hz.

[Aaron Clinton 2,372]

Do not have two of the same drivers in the same install in different enclosures.

[Thumpper 266]

running the same woofers in different enclosures is not recommended

you will end up with really muddy sounding bass

Edited September 8, 2009 by Thumpper

[sound=vibration 34]

I'll use rabbit joints so the box should hold. I already have SW8200's. For SW's 1.75 sealed = 30hz, so I want to use two aeroports sticking through the seat so when I want an SPL tune I won't have to switch anything out, I'll put a cylindrical piece of styrofoam in the ports for daily. I guessed that 47hz was my resonant frequency and it could be 45-60. I drive an Alero 4-door. I tried 2 SW's in 1.2cf3 each in my old Sunfire on 375W each and they hammer 20-30hz like its going out of style and that box was tuned around 38hz. I had one in a ported box on 750W 2.2cf3 @ 37hz and it didn't go much past 30hz, so I'm thinking I either want a sealed tune of 30hz and an SPL tune of 30hz, I could even use one sealed box @ 30 and the other at 40hz.

you cant tune a sealed box if that is what u meant... i think before you decied to run that much power and equiptment research a little about different enclosures electrical upgrades needed and go from there... by no means am i saying you dont know what your talking about maybe its worded wrong...