SD + XMAX = SPL ...correct?
500 Watt CAFz'r
Joined: Oct 2004
Posts: 870
Car Audio Season just kicked in....did anyone notice yet?
I'll also vote for best thread this year.
So....?
Does X-Max play a role in the variables? And how does that figure into port calculations, considering that minimum excursion is at the tuned frequency?
Would that be considered the "linear" side of the balance?
On most simple programs, the X-Max is related to the mechanical power handling at below tuned frequencies.
I'll also vote for best thread this year.
So....?
Does X-Max play a role in the variables? And how does that figure into port calculations, considering that minimum excursion is at the tuned frequency?
Would that be considered the "linear" side of the balance?
On most simple programs, the X-Max is related to the mechanical power handling at below tuned frequencies.
Originally Posted by SPLN00B2
are you always drinking when you use a computer?
The few drunken posts I put on the *unmentionable, terrible other forum* could be explained by St.Patty's. Good times....
Tonight I just felt like a Guiness. Had I known that I was going to spit it all over the keyboard, I'd have grabbed a Pil.
So the answer to your question is on occassion.
But reading this thread from start to end makes me wish I had more than 1.
50 Watt CAFz'r
Joined: Nov 2001
Posts: 306
Originally Posted by Starterwiz
Does X-Max play a role in the variables? And how does that figure into port calculations, considering that minimum excursion is at the tuned frequency?
Play somewhere near that tuning frequency.
Add power until subs reach Xmax at said frequency.
Add more power and watch Xmax exceed 300%.
Play wrong frequency, blow subs to .
Ready to world record.
Originally Posted by A-Rok
Build a box, tune it to a frequency.
Play somewhere near that tuning frequency.
Add power until subs reach Xmax at said frequency.
Add more power and watch Xmax exceed 300%.
Play wrong frequency, blow subs to .
Ready to world record.
Play somewhere near that tuning frequency.
Add power until subs reach Xmax at said frequency.
Add more power and watch Xmax exceed 300%.
Play wrong frequency, blow subs to .
Ready to world record.
Ready to world record..... You said it brotha'
Originally Posted by JordyO
^^ x2....
As much as all of these theories help, they aren't much good because you are talking about drivers without taking the enclosure into consideration.
When was the last time you ran a sub without an enclosure
As much as all of these theories help, they aren't much good because you are talking about drivers without taking the enclosure into consideration.
When was the last time you ran a sub without an enclosure
Probably easier for most to stick with modeling programs like WinISD or bassbox which can figure out things like that for you, along with a whole lot of other useful information...
Last edited by Haunz; Mar 23, 2007 at 12:59 PM.
500 Watt CAFz'r
Joined: Apr 2000
Posts: 890
Originally Posted by A-Rok
Build a box, tune it to a frequency.
Play somewhere near that tuning frequency.
Add power until subs reach Xmax at said frequency.
Add more power and watch Xmax exceed 300%.
Play wrong frequency, blow subs to .
Ready to world record.
Play somewhere near that tuning frequency.
Add power until subs reach Xmax at said frequency.
Add more power and watch Xmax exceed 300%.
Play wrong frequency, blow subs to .
Ready to world record.
lol how true is that.
Originally Posted by A-Rok
It's all about the science.
Science IS SPLZ!
That arguement really got to a moot point. The scenarios were silly and unrealistic. Now were we using any given coil available on the market, a 4" will handle more power than a 2.5". I am not aware of any 2.5" coil that will handle more.
Not only that, but a 4" coil will be louder than a 2.5" coil. Given an equal overall size coil, same length of windings and all, the 4" will absolutely dominate the 2.5". Let's say we have a 4" coil with a 1" length, an equivalent 2.5" coil will have a 1.6" length. The 60% increase in length will in no way come near the benefits the 4" coil has over it in diameter, not to mention the over 250% increase in coil area. The 4" coil will have a much greater force applied to it given equivalent motor and will cool better on burps. The 2.5" coil will go thermal long before the 4" coil will.
Science IS SPLZ!
That arguement really got to a moot point. The scenarios were silly and unrealistic. Now were we using any given coil available on the market, a 4" will handle more power than a 2.5". I am not aware of any 2.5" coil that will handle more.
Not only that, but a 4" coil will be louder than a 2.5" coil. Given an equal overall size coil, same length of windings and all, the 4" will absolutely dominate the 2.5". Let's say we have a 4" coil with a 1" length, an equivalent 2.5" coil will have a 1.6" length. The 60% increase in length will in no way come near the benefits the 4" coil has over it in diameter, not to mention the over 250% increase in coil area. The 4" coil will have a much greater force applied to it given equivalent motor and will cool better on burps. The 2.5" coil will go thermal long before the 4" coil will.
