Prolifik

iTrader: (7)

here is a scenario.....

i burp at 52hz (which is the best hz for the vehicle) and i get a number, say its 155 db's.

then i burp 55hz and the spl drops to 152 db's

then i burp at 49hz and i get 154 db's

my question is this. why does a frequency change of 3hz lower produce less spl lose than change of 3hz higher? should it not be same or close since the sin wave is a porabola? does this depend on the vehicle?

anywhere from 45 to 52hz i get small but steady increases in spl, can be as small as 0.2 db's increments from hz to hz. but, anywhere from 52 to 56 hz spl starts dropping fast as much as a full db from hz to hz.

can one of u nerds explain this.

Lessy

... cause impedence rises faster after your boxes peak than before

MarkB

... and the reaction of u'r vehicle to the pressure and its' resonant freq(s). If you can graph the resonance of u'r vehicle, it will not come out symmetrical.

MTA

iTrader: (1)

what Lessy said ( impedance rise ) ... plus it has lots to do with wavelengths and cancelation

Xiph0id

iTrader: (1)

Agreed less MTA's Wavelengths.

Prolifik

iTrader: (7)

i think u are all wrong

Xiph0id

iTrader: (1)

Remember it's a combo of box and car that makes it louder at X frequency.

Size and frequency both need to be tested to find loudest frequency.

But if you know everyone is wrong why are you asking?

Lessy

ya... now build me my box!

zzzzzzz

iTrader: (5)

1st have you moved the box form when you did the 49-55 there is a lot more then just #hz

what was in the car ? like just you was the seat up

what you are asking is like i need a box made how big do i need it to be?


what car what amp ?
what box what is in the box(fill) ?
is it outside test is it sunny?
WHERE IS THE BOX ?
it the box ported?
is the box fastend down?

Djcake

iTrader: (2)

damm he builds boxes for you?

I have been trying to get him to build me one for a while now