Ampliphier Voltage
Thread Starter
1000 Watt CAFz'r
Joined: Apr 2002
Posts: 1,089
Was thinking about it and was wondering. What is the voltage at eh output terminals at full output on a 1000W amp @ 2ohm.
Obviously not looking for an exact just a ball park nearest i can figure I think is to high but i only estimated the inductance of the VC.
If anyone has a sub laying around measure the inductace of the VC and post it please.
Obviously not looking for an exact just a ball park nearest i can figure I think is to high but i only estimated the inductance of the VC.
If anyone has a sub laying around measure the inductace of the VC and post it please.
basic ohm's law... power = voltage squared/resistance
so!
1000 = voltage squared/2
1000X2 = voltage squared
square root of 2000 = voltage
therefore your voltage would be
44.72 volts and your current would be 22.362 amps
(power = volts times amps)
so!
1000 = voltage squared/2
1000X2 = voltage squared
square root of 2000 = voltage
therefore your voltage would be
44.72 volts and your current would be 22.362 amps
(power = volts times amps)
Thread Starter
1000 Watt CAFz'r
Joined: Apr 2002
Posts: 1,089
Ya but the coil has inductance so that is going to increase the resistance of the coil. How much it increases is going to depend on the frequency, the higher the frequency the more it is going to increase.
That is why I wanted to know the actual inductance of the coil.
That is why I wanted to know the actual inductance of the coil.
Thread Starter
1000 Watt CAFz'r
Joined: Apr 2002
Posts: 1,089
Its still has to be somthng close to what you were assuming because I can not see the inductance being that high and the frequency subs play at are fairly low.
Just a though but i guess that works nicly that low frequencys are played by bigger drivers that use bigger VC therefor Bigger inductance (low freq and high inductance still keeps inductive reactince low) and tweeters have smaller VC's giving them a very small inductance and the frequency is very high so the inductive reactince is still small.
Just a though but i guess that works nicly that low frequencys are played by bigger drivers that use bigger VC therefor Bigger inductance (low freq and high inductance still keeps inductive reactince low) and tweeters have smaller VC's giving them a very small inductance and the frequency is very high so the inductive reactince is still small.
Guest
Posts: n/a
^ Impedance changes with frequency for any speaker. It can range anywhere from 2 to 60 ohms easily for a "4 ohm" woofer.
If you want a specific value at a specific frequency you can certainly measure it but it is of little use unless you're into SPL.
If you want a specific value at a specific frequency you can certainly measure it but it is of little use unless you're into SPL.
Thread Starter
1000 Watt CAFz'r
Joined: Apr 2002
Posts: 1,089
Not realy it ignores inuctive reactince. Even if the coil had an inductance of 0.005 heneries it would take the impediance of the coil up to 4.512 ohms at 80HZ and then
1000 = v^2/4.512
4512=v^2
V=67
I assumed 0.005 heneries and wich could be way off, i have been looking through ampliphier design procedure and am just trying to work throught the ampliphication stage and am woundering the amplitude of the final wave and to determine that I need to have an idea of the inductance of the coil
1000 = v^2/4.512
4512=v^2
V=67
I assumed 0.005 heneries and wich could be way off, i have been looking through ampliphier design procedure and am just trying to work throught the ampliphication stage and am woundering the amplitude of the final wave and to determine that I need to have an idea of the inductance of the coil
