30 to 50 watts seems to be all I desire

there is a difference between a speaker being sufficiently driven versus the same speaker being driven to show all it can do at higher volumes

alot depends on the type of music, how much dynamic range is needed

smaller wattage amps often do the mids and nuances very well, but will sound compressed and/or flabby/unconvincing in the bass when the music become more dynamic

big power amps might not be as highly tactile at lower volumes but will provide a great sense of ease and naturalness as the music becomes more dynamic and complex

the sweet spot in all this depends on the specific case... speakers, taste of listener, type of music listened to, room, and volume levels

Less is more...its the "first watt"....as they say.....my class A 30 watt amp is superior to most.....at least to me ears....and that's all that matters....

What about the song 10,000 watts? Sure made Noriega give up. 

I stay at 25-35% 60-75db. Mercy the wife will punch it. I grab the Rabbit and boogie. 90-100db. Nelly Furtado seems to trigger that with her, Me I'm more of a classical guitar guy with congas, or tumbadoras. Shelia E. kinda guy.. 

I listen to a MC225 all the time. 25 wpc. Some things you just don't mess with, that little amp is one of a kind sound for sure. Nothing sounds like a MC225, it's fun.

Regards

I think like this.

We have speakers that has efficiency ex 86 db/w/m.

So we will use more or less 1 watt to reach our desired sound pressure in 86db.

Therefore if we use 5w amp OR 500w amplifier we will ALWAYS be using ~1w disregarding what ever of amp you're using.

But I am not saying that a 5w amp is enough that is not my point.

When looking at what Paul M at PS audio is saying.

• A over dimension toroidal then the electric circuit needed. Will give be beneficial for sound quality and they usually use bigger than needed.

Another point is that when we know that 98% of all speakers need only one watt to satisfy us.

Why is that so that most of the times it is the biggest and heaviest and most powerful amp is the one that reviewers tend to think is the best sounding one. Even if smaller models in the same amplifier line and brand.

Then what is the difference of all amplifiers that all of them is enough to drive our speakers.

Despite more complex design with more number of transistors (of the same kind) to give more watt out (that we probably do NOT need and probably the higher parts count will not contribute to better sound quality or reliability.)

But on the other hand what do the bigger amplifier have than the smaller ones don't? Yes when we sit there and listening to our 1w then the bigger amplifier has a bigger toroidal and bigger capacitors.

That is the practical difference and the path to better sound quality as i see it. And my two Satoshi.

@dynamiclinearity said "Power is used for very, very short term transients which can be 20 to 30 dB"

This misrepresents what is actually on recordings. Over two decades, I transferred over 1,000 LPs -- from rock to classical -- from LP to digital format, so spent a lot of time watching loudness levels during the transfer, using Adobe Audition. I've never seen a recording where the average loudness level allowed for 20 or 30 dB peaks.

Now, lots of recordings have "dynamic range" in excess of 30 dB, but that includes the soft parts -- perhaps a solo instrument being softly played during an orchestral recording.  But, the quieter parts of a recording are supposed to be played at a soft level.  Those soft parts are well below the average level.

Then there are rock recordings where one often sees the average level almost at the max level permitted by the media -- one may be lucky to have 3 dB peaks in such recordings -- remember the loudness wars?

Simply put, if your average recorded level is -6 dB, there is simply no place to put a 30 dB peak transient.  If it existed in the live music, its been lopped off in the recording. LPs are slightly different from digital recordings, but they also have their limits, too.

In short, to have a 30 dB peak transient on a digital recording, the average playback level would have to be 30 dB down. There aren't very many recordings that meet that criteria.