New guy question on down firing woofer arrangement

[martyh]

Hello subwoofer builders,

I have a pair of 12” subs that I built years back and I need to put them in new enclosures. I am using a sealed Q = 7 alignment with an F3 around 35Hz. The crossover may be as high as 100 Hz 2nd order. I would like to build the new boxes with a down firing configuration. Can anybody tell me if there is a rule of thumb for the height of the woofer from the floor to avoid any front loading?

Thanks in advance,
Marty

[atledreier]

The area of the opening needs to be bigger than the area of the driver.

[Mike P.]

See this thread, post #10.

http://www.hometheatershack.com/foru...html#post65272

[martyh]

Ahhh… thank you. That is exactly what I needed.
And....no flames for calling something with an F3 at 35 Hz a “sub” or not finding the proper thread in the archives before asking. You guys have a nice forum going, thanks for the help.

[Mike P.]

We would never flame you! We might tease you though......