Audio Equipment/Electrical Discussions Based on Automotive Stereo Equipment Such As Amps , Head Units & Speakers Including Installation and System Set Up Information. Electrical or wiring issues on anything that requires wiring.

Ohm's???

  #11  
Old 04-09-2010, 05:53 AM
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but like stinker said its pretty simple, if your good a math i can explain more laer i have class
 
  #12  
Old 04-09-2010, 05:54 AM
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Originally Posted by 2500HeavyDuty View Post
who uses U cmon now

E (electromotive force also knows as V)
I (stand for current or amperage)
R (Resistance)
P (power or watts)

E = IR or R = E/I or I = E/R

and for Power there is

P = IE or P = (E^2)/R or P = (I^2)R
What the..... I damn near deleted that as spam
 
  #13  
Old 04-09-2010, 08:31 AM
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guess, it is the damn euro thing inside me...

Damn, when I would get my hands on an orion amp today- real good old skool
not those skinny, flimsy ones.
 
  #14  
Old 04-09-2010, 02:32 PM
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Originally Posted by Jazz View Post
What the..... I damn near deleted that as spam

 
  #15  
Old 04-09-2010, 02:40 PM
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Originally Posted by Deezel Stink3r View Post

guess, it is the damn euro thing inside me...

Damn, when I would get my hands on an orion amp today- real good old skool
not those skinny, flimsy ones.

i kinda forget hot to set up an am with just using a DMM though
 
  #16  
Old 04-09-2010, 03:34 PM
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You need:
a) Test tone cd (shoot me a pm if you need it)
b) DMM with AC Voltage setting
c) formula: voltage= SQRT (P x R)

- use a 50Hz or 60 Hz tone ( DMM must be calibrated to this)
- max RMS PWR of the amp multiplied with the speakers resistor and take the root of the result. The result is the max. voltage at peak power.

turn up gain until you reach peak voltage as calculated.
Or a bit lower to have a safety margin.

you are done.
 

Last edited by Deezel Stink3r; 04-09-2010 at 03:37 PM.
  #17  
Old 04-09-2010, 03:41 PM
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so is P is E^2/R

and then you have E^2/R times R

which then makes E^2

and the SQRT of that is E

and your measuring AC in volts

so E=E
 
  #18  
Old 04-09-2010, 03:50 PM
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Originally Posted by Deezel Stink3r View Post
You need:
a) Test tone cd (shoot me a pm if you need it)
b) DMM with AC Voltage setting
c) formula: voltage= SQRT (P x R)

- use a 50Hz or 60 Hz tone ( DMM must be calibrated to this)
- max RMS PWR of the amp multiplied with the speakers resistor and take the root of the result. The result is the max. voltage at peak power.

turn up gain until you reach peak voltage as calculated.
Or a bit lower to have a safety margin.

you are done.
Originally Posted by 2500HeavyDuty View Post
so is P is E^2/R

and then you have E^2/R times R

which then makes E^2

and the SQRT of that is E

and your measuring AC in volts

so E=E

hehe that was fun.

anyhoo for the other guys who arent crazy at math

if you have 300 watts of power (RMS) at 2 ohms comming from your amp and your subs are wired up at 2ohms resistance

then V = SQRT(300watts X 2 ohms)

so you get V= SQRT ( 600)

so your voltage should be 24.5V
 
  #19  
Old 04-09-2010, 04:00 PM
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you confused me badly...



next time I choose the formula for AC, not DC and then we go wild with complex Z, j and i
 
  #20  
Old 04-10-2010, 03:05 AM
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ooh so we get to talk about magna flux and impedance now do we?
 

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