Originally Posted by basshead81
beeman gained some extension when he added a third klipsch rw12 sub. I have no way to measure thd and no longer going to debate this with you. Tom @ PSA has been building subs for years, I trust his opinion more than yours(no offense). If Toms word and my graph is not enough proof for then oh well, I could give 2 shits...were done here!
It really is just a guessing game without all the variables.
If Beeman added his third sub and it gave him some further extension, it is possible that the position he put the sub in yields the lowest extension relative to his LP. If that were the case, he would have been able to gain that extension without actually getting another sub and instead moving one of his other subs into that spot theoretically would have yielded the same result.
As a general matter, if you find a spot in your room that yields the lowest frequency extension, then sans getting another type of subwoofer to dig lower, that is the best extension you can expect with the same subwoofer. After all, ported subs don't magically have lower tuning frequencies simply because you added another or ten into the same room - the roll-off below tune will still be the same.
I can't fathom why you take this all so personally or as a slight against your subs or PSA, basshead. I think the XV15 is the best sub in its price range. The only reason this discussion has continued is that you are in just about every thread throwing around random SPL numbers that are relative to you, your room and your setup alone
. They are not transferable between rooms or different setups. Some members may be able to hit much better numbers with the same subs in their rooms, others will do much worse (and it still says nothing about distortion), so where is the value in it?
The transfer function of the room from the sub to the LP is the most important factor IMO. Some rooms are easy to drive (like yours), others are substantially harder (like Archaea's), cubic volume doesn't tell you everything you need to know.