Originally Posted by CharlyD
The interaction between an amplifier and a speaker can be quite complex. While speaker sensitivity is the most critical factor, parameters such as speaker impedance and phase can also be critical.
I went through this site http://www.soundandvisionmag.com/spe...tem-page2.html
Nominal impedance for the L820 and LC2 measured unusually low at 4.3 and 4.4 ohms, respectively — something to note when matching them with an amplifier or receiver.
Is lower impedence than the rated impedence a good or a bad thing?
How does impedence fit into the calculation? Some amps say power is X WPC at 4 ohms, while Y WPC at 8 ohms, where X > Y. Does it mean that speakers with lower impedence can be used with a less powerful amp, and hence better return on investment?