ohms

I have a Marantz SR5013 and two rather "ineffecient" Nubert speakers 82.5db/1m@ 4Ohms. (nuBoxx B-40) For the AVR it says in the specs it can drive 185W for 2x speakers at 4Ohms, and of course less the more speakers are connected. Now, I don't have any issues with this setup currently, yet I...

I'm having a hard time understanding how Ohms and watts are affect the quality of a sound system setup. For example, what is the difference if you run a speaker that is 4 ohm and 300 watts RMS with an amp that matches the ohms and RMS watts per channel, vs running that same speaker at 2 ohms and...