lets talk spl and it's tuning

[sadistic 13]

first off i am not mister know it all so please bare with i do know a lot but will see . but any ways what is it with resonant tuning frequency? would it be better to tune low as possible for like a t line and get a higher score? unless your talking frequency length. the lower in the octave you got the hard the bass hits right ??? with in reason of course like the sub dropping off and just can't play well at 18 hz were it plays better at 47 Hz etc etc ... because the music energy is reaching the mic at it full potential of 47Hz if you tune to high the spl drops off again so you lose power in the spl right??? so why would you look for a resonant frequency like 18 hertz i thought was a resonant frequency because it resonates the body panels. which is not wanted any thing below 20 hertz really but is wanted because it hits the hardest hence the tuning of the subsonic filter right??? but the only problem i see is frequency length at 20 Hertz being to soft because the box dropped off kinda like a sealed in the graph on winisd were 40-50 hertz and above it is about base line like 1 w/ 1m of spl.and gradually drops off the lower it goes so 20 hertz is 12 db's down of the same sub in a ported box so if you lay the two over each other the ported and the sealed in winisd at 20 Hertz some subs are 12 db's different between the two ported versus sealed . but still frequency length is longest at 20 hertz but tends to drop off some times right because of the box ??? so if it's better to play low why are people looking for high frequency's??? if tuning low is best would this make a t-line best ??? i know t line will play lower in the octave such as 18 hertz and will out put a heck of a lot of db's then a ported for the same sub does. with in respect to that sub because certin sub play best in that certain box right??? kinda like putting a infinite baffle only sub in a ported box why do it ??? so why would you look for a higher resonant frequency is it because you are not reaching the mic??? then box is to far away but has to be behind the "b" pillar of the automobile right for most competitions so that would rule out car's for spl comps right if you wanted to hit a big numbers??? isn't this were planing comes in to effect ???? so why on one of my test tone disks booklets why does it say 67-200 hertz is the best for spl ???? i though 80 hertz and above was for mids/highs lol's i have never seen a sub play 67 and up but thats what the booklet say is for maxium spl is there a reson for this or is it just a typo????

[jcarter1885 995]

FAIL! and why so many ? marks.

[///M5 2,833]

I closed this thread. Glad to re-open it if you take the time to write it in a fashion that is legible.

Adding question marks in the middle of run-on's does not make a paragraph.

Please re-write your first post and I'll put it back in the thread and re-open it.