Thread: Audio Setup - Ohm Question Please Help !

It's intersting that Infinity decided to go with 2ohms on those over 4ohm. I'd imagine that will cause many headaches for customers upgrading their stock speakers. (Headunit will overheat and cutout).

If you plan on using an aftermarket amplifier and not the built in amp in your headunit, then almost every aftermarket amp can operate at 2ohms (as long as you don't bridge the channels).

JL is a nice choice because the power supply design does not care if you connect 1.5-4ohm speakers, power ouput will be identical for any loads between those values.

I once read a write up about why "they think" that 2 ohm speakers are more efficient. They went into detail about stock speakers testing out at under 4 ohms like 3.4-3.6 ohms before they are being used. Then after signal is given from the source unit, without the help of external amplifiers, to the speakers and the voice coils warm up, that the impedance is closer to 2 ohms.
But I question the fact that if the impedance drops after it is in use, wouldnt the aftermarket be exposed to that same type of drop? And with that question in mind, if you start out with a 2 ohm speaker, would it not drop impedance while it is in use to something like 1 ohm which in most applications cannot be handled by a normal headunit (factory aftermarket) without the help of an external amplifier rated to do so.