Calculating a subwoofer system's efficiency...

 

Bronze Member
Username: Darkvirus

Mt. vernon, AR United States

Post Number: 17
Registered: Dec-06
Anybody got any equations theyd like to share?
 

Gold Member
Username: Frkkevin

Resonant Engineering..., Fort Worth... Email

Post Number: 3119
Registered: Nov-05
I've sent in my application to the Real World. So I'm hoping to hear back from that. I'm putting A LOT of my eggs into that basket, the MTV basket. I'm also thinking about getting a gun, and dealing crack. Being a crack dealer. Not like a mean crack dealer, but like... like a nice one. Kinda friendly like, "hey, what's up guys? Want some crack?" I'm just waiting on those two things to flesh themselves out.
 

Silver Member
Username: Rosrock2000

Notre dame!USA

Post Number: 290
Registered: Dec-06
so.. u want to sell crack to get a new system?
 

Silver Member
Username: Nd4spd18

Post Number: 326
Registered: Jul-06
Most subwoofer manufacturers give you that spec, but if yours doesn't, go to this page and scroll down to the calculator:

http://www.bcae1.com/speaker.htm
 

Gold Member
Username: Frkkevin

Resonant Engineering..., Fort Worth... Email

Post Number: 3120
Registered: Nov-05
Efficiency of the whole system.. marshall posted it long ago..
 

Gold Member
Username: Adddisorder

West palm, Florida

Post Number: 3270
Registered: Jan-06
cannan had some big equation he used to find his
 

Gold Member
Username: Nyyfan13

Fi SSD USA

Post Number: 3639
Registered: Jul-06
"I've sent in my application to the Real World. So I'm hoping to hear back from that. I'm putting A LOT of my eggs into that basket, the MTV basket. I'm also thinking about getting a gun, and dealing crack. Being a crack dealer. Not like a mean crack dealer, but like... like a nice one. Kinda friendly like, "hey, what's up guys? Want some crack?" I'm just waiting on those two things to flesh themselves out."

wat the hell kevin?? that was random as sh-t lol
 

Gold Member
Username: Wingmanalive

A pic is worth 1000 words

Post Number: 3766
Registered: Jun-06
Funny stuff man.
 

Silver Member
Username: Spkrman

Chi town, IL U S A

Post Number: 151
Registered: Mar-06
put it in and test :-)

lots and lots of variables you cant calculate.
 

Gold Member
Username: J_baby15

Kentucky

Post Number: 1264
Registered: Feb-06
Kevin-Talladega Nights maybe?? lmao.

Marshall did hav a big a55 equation to find it, I think overall all it was a very low percentage.
 

Silver Member
Username: Freezeman_7

EveryThing I Own is FO..., OK U.S.A

Post Number: 711
Registered: May-06
i love talladega nights, thats a damn good movie. not random at all,, i thought it was funny
 

Gold Member
Username: Frkkevin

Resonant Engineering..., Fort Worth... Email

Post Number: 3141
Registered: Nov-05
yea.. Marshall.. Canaan.. w/e get yourself on and post lol
 

Gold Member
Username: Rvlacos

DD 3512 , VR1000D 15= overcomp...

Post Number: 1724
Registered: Sep-06
u have to calculate:

var deltaX = x2-x1; var deltaY = y2-y1;
then
convert theta from radians to degrees.


if that doesnt work try this

"Find x > 3 such that

ln(x) < x^(0.1)"

you have to understand the theory of operation:
Q = (P1 - P2) r4 / 8cL
Q = Volumetric Flow Rate
P1 = Static pressure at the inlet
P2 = Static pressure at the outlet
r = Hydraulic Radius of the restriction
c = (eta) absolute viscosity of the fluid
L = Length of the restriction

Since , r and L are constant, the equation can be rewritten as:

Q = K(A P/c)


and then you will have your answer!
 

Gold Member
Username: Arande2

400dB could probably d..., SouthWest Mi... Too Many DBs...

Post Number: 1247
Registered: Dec-06
Lol
 

Silver Member
Username: Freezeman_7

EveryThing I Own is FO..., OK U.S.A

Post Number: 713
Registered: May-06
that looks like a f*ckin foriegn language to me.. wtf
 

Gold Member
Username: Frkkevin

Resonant Engineering..., Fort Worth... Email

Post Number: 3148
Registered: Nov-05
I'm glad i could care less how efficient my setup is.. I'll just let the TL mic tell me what I'm doing right or wrong lol :-)
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