Replacing the 2 ohm with 4 ohm
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Originally Posted by Inno
You need to learn about amps. Nothing is constant in a car, and your assumptions are wrong. The power is not constant and thats why you don't understand the concept. As I stated, when you connect an amp capable of driving different impedance speakers, the output power of the amp outputs actually changes. Take a look at the amp manual. They will say things like 100Wx4 at 4 ohms or 140Wx4 at 2 ohms.
Next you should review your EE books and learn about RMS power some more, because it doesn't double as you were suggesting. It is RMS (Root Mean Square) power that is important here. Square root of 2 ~= 1.4
Next you should review your EE books and learn about RMS power some more, because it doesn't double as you were suggesting. It is RMS (Root Mean Square) power that is important here. Square root of 2 ~= 1.4
Originally Posted by Inno
Regarding "you need more power to drive more resistance," I will spell it out for you. Two similar speakers, one 2 ohms, one 4 ohms. Put them on the same amp. The 4 ohm speaker will require you to turn the volume up more to get the same loudness as the 2 ohm speaker did.
Originally Posted by Inno
It's really a simple experiment. Stick 2 ohm speakers on an amp, and stick 4 ohm speakers on an amp. Tell me which is louder. It will be the 2 ohm speakers. The reason? Because as we both indicated... P=II/R, you decrease the resistance and the power goes up (just like I mentioned above with the amp manual example).
I'm sorry that your EE degree didn't teach you this. Maybe I learned that while I did my MSEE? Oh I forgot, I didn't learn this $hit in school. It is real world applications. Sometimes you can't learn everything from a book dude. Just go try it. Respond as you wish, but I'm done with this thread.
I'm sorry that your EE degree didn't teach you this. Maybe I learned that while I did my MSEE? Oh I forgot, I didn't learn this $hit in school. It is real world applications. Sometimes you can't learn everything from a book dude. Just go try it. Respond as you wish, but I'm done with this thread.
Last edited by MechEE; 04-16-2006 at 06:43 AM.
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