15" Dc lvl 4xl vs 6 SA 8's

[audioholic 5,000+ posts]

Yes, usually 18's have an excursion advantage over 8's. Yes, that *can* create an output advantage. But there are many outside factors, like enclosure design (type/size/tuning/alignment/impedance rise) that will affect the total excursion potential of the subwoofer(s) in the system.

One possible solution is for you to build a box with an interchangeable port. One port tuned high for burping at the local shows, and one port tuned low for daily listening. The array of smaller subs would add an extra layer of complication to this type of design however.

Remember, there is a big difference between being able to hit 150db, for a few seconds, at only one perfect frequency (burp)... and being able to hit 150db in a wide enough passband to make the system enjoyable to use for playing music.

 

[KyleBechtold 5,000+ posts]

Yes, usually 18's have an excursion advantage over 8's. Yes, that *can* create an output advantage. But there are many outside factors, like enclosure design (type/size/tuning/alignment/impedance rise) that will affect the total excursion potential of the subwoofer(s) in the system.
One possible solution is for you to build a box with an interchangeable port. One port tuned high for burping at the local shows, and one port tuned low for daily listening. The array of smaller subs would add an extra layer of complication to this type of design however.

Remember, there is a big difference between being able to hit 150db, for a few seconds, at only one perfect frequency (burp)... and being able to hit 150db in a wide enough passband to make the system enjoyable to use for playing music.

this.. people will bring up jacob testing the one but that is so impractical and would probably play one note and not sound good doing it.. do like ^^ said and make a bolt on port for daily.. bolt it up to extend the port and lower the tuning and take it off for comps.. I would suggest using a thin weather stripping the foam ones and put it on the removable port so when you screw it down it makes a better seal with out having to use duct tape each time