Fi.Q possibly a 6th order bandpass

[juddspaintballs 10+ year member]

I'll be getting an Fi.Q soon, 12" Dual 2 ohm. I am planning a really short but really wide and deep ported 2 cube box at 28Hz right now. But I might toy with the idea of a 6th order bandpass modified where the port from the rear volume fires into the volume of the front area and utilizes it's port as well. (like this http://www.diysubwoofers.org/bnd/6thord4.htm)

Problem is, I don't really know how to design one for the Fi.Q. If someone could figure out the front and rear volumes as well as the port sizes and lengths for this style 6th order bandpass, I would greatly appreciate it. From there I can manipulate the shape of the box until I'm happy. I'm looking for SQ mostly, but if it got a little loud on occasion for fun I wouldn't mind (not a priority though).

Thanks guys

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[newusername 10+ year member]

I almost guarantee that you would prefer a 4th order single reflex bp for the Q series.

Neil

 

[juddspaintballs 10+ year member]

would I prefer a 4th order over the simple ported?

and if so, got any ideas what size I should make a 4th order?

 

[xluben 10+ year member]

talk to 80, he'll hook you up

 

[juddspaintballs 10+ year member]

well, another audio buddy of mine from another forum was able to design one:

rear chamber being 2.07 cubes tuned to 22.3 Hz and the front being 1.11 cubes tuned to 51.4 cubes. He also showed me through WinSD that the Q is right on the line between ideal for a 4th and ideal for a 6th order bandpass. Neil, if you're interested I can send you the xcel file of the design with all the specs and numbers so you can pore over it.