Obviously amplifiers in audio applications don't put out constant power. My example was for a "simple" DC amp as stated to give people some intuition. There's no reason to get in to the details of AC power as it's not relevant to my point. DC examples demonstrate clearly how power changes as load changes.

The reason that you need to turn the "volume ****" up more is because the amp is NOT delivering as much power in to the 4 ohm load as the 2 ohm load. By turning up the volume, you are increasing the power in to the load. When they are at roughly the same volume, the amp is putting out roughly the same power. You don't need "more power" to drive less resistance. Understand my point now?

I don't know where you got your degree, but all of these basics were covered in detail in my program. Frankly I'm a bit suprised to hear you have a EE degree and say things like "P=IIR ---> You need more power to drive more resistance". It demonstrates a lack of intuitive understanding of the basics. My replies here were simply to give people an intuition for why the power in to the load varies, what that means, and to clarify that it is not "easier" to drive a 2 ohm load.

 

Not trying to teach people EE, just trying to show them that the 2 ohm speaker is going to be louder than a 4 ohm at the same volume level, which is the topic of this thread dude!

 

WOw, thanks guys. This topic is getting too technically detail. I guess I should stick with 2 ohms then.

lol, if i read anymore i'm turning to Einstein(sp?)

 

Now if I swap my 4 ohm sub for a 2 ohm sub on my JL amp, power output and volume stay constant.