General SPL General discussion of Sound Pressure Level topics.

Under Construction New Project Custom Box Flared Port Build Log Custom Wire Street B

Old Jul 10, 2009 | 08:12 AM
  #121  
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yea looking for the science behind it yuli

or at least what happens and how you compensate for it

do you have any test results to share

im sure guys would like your experience
Old Jul 10, 2009 | 11:57 AM
  #122  
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best thing to avoid brain damage with calculation and acoustical approaches is to use always 2 amps, hehehe.
Old Jul 10, 2009 | 12:29 PM
  #124  
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Originally Posted by psychoacoustics
yea looking for the science behind it yuli

or at least what happens and how you compensate for it

do you have any test results to share

im sure guys would like your experience
what happens is um the peak note changes to a lower one. to compensate for it you took the box a bit lower. that's really all i know.
Old Jul 10, 2009 | 01:02 PM
  #125  
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Originally Posted by MTA
its a funny thing but it has mainly to do with the impedance curve and the velocity of the port...thats why loading the port a certain distance from a surface is extremely important
Usefull info^^, Peter, maybe this weekend you could explain to me how this affects my build!! as it is, i just guess alot lol
Old Jul 10, 2009 | 01:02 PM
  #126  
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hmmm, interesting.... I'm still taking notes. Paper and pen has been next to the computer for 5 days now. Any more lessons to share? Other than come to the next show and get my butt kicked. lol
Old Jul 10, 2009 | 01:04 PM
  #127  
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Originally Posted by bart pyle
Usefull info^^, Peter, maybe this weekend you could explain to me how this affects my build!! as it is, i just guess alot lol
With 156+ I think your guess is pretty solid. lol
Old Jul 10, 2009 | 02:13 PM
  #128  
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cool thanks yuli!
Old Jul 10, 2009 | 06:40 PM
  #129  
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Originally Posted by Father Yuli
what happens is um the peak note changes to a lower one. to compensate for it you took the box a bit lower. that's really all i know.

btw..that car should get even louder if you get it between 52-54 hz
but that was an up loading box


Bart if I can I will bring my laptop so I can actually show you the graphs...thats why every burp during testing i check my power output and try to do a series of incar impedance curves and power curves
Old Jul 11, 2009 | 06:01 AM
  #130  
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Originally Posted by N130Gv2
With 156+ I think your guess is pretty solid. lol
well, i think my guesswork could get me close to a 160 but I dont want to be limited to that! Ive never done any sort of output test or impedance test before, knowing these things is only going to help me "exceed" my expectations!!

At Peter....i'll take you up on that offer, thanks!!

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