Keep it simple. Forget power, forget ohms. Focus on speaker sensitivity. When speaker sensitivity is high this is telling you they can be easily driven by a wide range of amplifiers regardless of power. A speaker with 98dB sensitivity for example will play 98dB at 1m with only one watt. Even further away where you sit and listen that is pretty loud. With just one watt. It should be pretty obvious when using this speaker it is totally irrelevant if amplifier power doubles. All this stuff becomes irrelevant.
The only reason it matters is many audiophiles still have not figured out all they have to do is ignore any speaker so power hungry it is unable to put out at least 92dB with 1 watt. They do this left and right, and once you get clued into what is going on you will notice all the people complaining about power and searching for amps and going on and on about what amp goes with what speaker, they are always using speakers less than 92dB sensitivity. Vast majority of the time for sure. And the more power hungry the speakers are the more they go on and on about it. Try and find the Martin Logan owner who says wow I can use any amp and my speakers sound great! No such thing.
The reason for this is very simple, it is that power and sound are log functions. Simple if you know math I mean. Sound seems to increase linear because we use dB which are exponential. So while 3dB sounds only a little bit louder, it is twice the power. Ignore my advice and buy a 89dB speaker you don't need a little more power you need twice as much. This is why all these people obsessed with power doubling as impedance drops. They never learned that with amps it is always the speaker that comes first - do don't blow it!
The only reason it matters is many audiophiles still have not figured out all they have to do is ignore any speaker so power hungry it is unable to put out at least 92dB with 1 watt. They do this left and right, and once you get clued into what is going on you will notice all the people complaining about power and searching for amps and going on and on about what amp goes with what speaker, they are always using speakers less than 92dB sensitivity. Vast majority of the time for sure. And the more power hungry the speakers are the more they go on and on about it. Try and find the Martin Logan owner who says wow I can use any amp and my speakers sound great! No such thing.
The reason for this is very simple, it is that power and sound are log functions. Simple if you know math I mean. Sound seems to increase linear because we use dB which are exponential. So while 3dB sounds only a little bit louder, it is twice the power. Ignore my advice and buy a 89dB speaker you don't need a little more power you need twice as much. This is why all these people obsessed with power doubling as impedance drops. They never learned that with amps it is always the speaker that comes first - do don't blow it!