labyrinth porting

Is that similiar to the labyrinth design?  Will I increase the chances of detroying the woofer? I still have the enclosure that you recommended first (4.75 net 65 sq" port tuned @40 hz) I then made one 5 net 60.75 sq" port @ just under 33 hz I believe. I have it in that at the moment. Woffer facing up port rear-firing. Will I get more low end or am I pretty much at the limit for this woofer as sound mentioned. Will the difference be worth the effort to do another enclosure? I want that real low end but do not want to push the driver too far, it can only reproduce 25-200 hz. How close is safe as long as my gain is set properly? As far as the higher freq bass, Will I be ok with a good set of 6X9's or comps running off the zx350.4?  I was thinking to upgrade the 6x9"s in the rear and set of good to high end comps for the door panels. I know I wasn't too specific as far as the low end in the beginning. I asked for a design that will still let me throw 750 to 1000 watts @ the driver and that is what you gave me. Thank you. I hope I am not being a pain but I am thinking I am not the first to try multiple enclosures to find the one best to thier liking.