sub enclosure

No, IMO, not a good idea at all.  You will get no benefit whatsoever by using two different alignments with your sub bass.  On the contrary, the sound will suffer because of it.

I worked this up in WinISD and it looks best as a vented application (although the parameters say otherwise).  Go to Audiobahn's website and look up the 2005 woofer database.  You will find box parameters for this sub.  Choose the box size that is labeled "ultimate SPL bass box".  I would make both of the 4" ports 12" long instead of 10.5", though.  Notice that it is two ports per sub.

You will also need to use a 30 Hz highpass filter in any alignment bigger than 1 cu ft / sub sealed.  Note:  you can build this vented box so that it allows up to 4 cu ft per sub if you wish.  Best response is with the larger enclosure, and port sizes remain as stated above.

hey thanks,

my idea was that the sealed one would hit a little clearer and the ported on would but out some nice rummbley low lows...  but not so as ur saying

thanks

thanks all for your help

i thought each sub need 1.45cuft per sub.. i thought thats what the spec's said

thanks