1. This is the question, you shouldn't say 'you require 1000W to perform their best', you should say 'the speaker requires min 50W only, but the speaker can handle up to 1000W for full loudness 121dB, if necessary. other speaker can't achieve this loudness even feed it with 1000W because.......' something like that. This is
the spec should be intepreted.

2. If cost is not an issue, it is definitely no problem to get a amp as large as possible. Say 5000cc car should better than 3000cc, right? But do we really need 5000cc if we there is traffic jam all the time. Besides, is 5000cc the only factor we should consider? Should we consider other features, luxaries, comfort etc?
Same logic to amp, with certain amount of budget, should we get as much power as possible, regardless quality? How about similar price Bryston vs Pass?

3. I disagree using small power to lower sensitivity too, I know distoration is the most dangerous thing to spk. I'm just talking about how many watt do we really need.

kcm

1)如果我想出售一型號喇叭最大承受必v為50W-1000W,我跟著對他說要用1000W才推得好,他會相信嗎？他一定轉頭就走,無可能說實話!

2)你覺得找一部能發揮盡喇叭的"有限動態"擴音機有問題嗎？(我個人覺得合理)

3)你當然可以用一部輸出比喇叭承受必v較大的擴音機去配合,因為你唔會用peak power去聽,(日常工作中、我很多時會用3-500W power amp去推動一對承受必v1-150W喇叭,當然太大damping 的power amp會令它過於受制),我個人覺得反而用一部小必vpower amp去推動低效率及低零敏度喇叭更危險！

行內人
I know you are based on a particular speaker, but according you said, why we need to do complicate calculation? Why can't we just simply say you need 250W power amp because the speaker (A) power handling is 250W?

And let say another speaker B power handling is 120W, i.e. equals to 20dB, and if I got a 20dBW power amp, then if your logic is hold, I should get the same dynamic range no matter which speaker (A or B) to pair with my amp, I only got 20dB dynamic range both cases, correct?

Then, should I give up my amp simply because it cannot fully explore speaker A's dynamic range? Why I need more power simply because my speaker can handle more, not require more?

kcm

若有最高承受必v-(是連續不是瞬間),就可以計算出該喇叭的動態(dynamic range)及最大聲壓值(SPL).

點解說明書上沒有標明該喇叭的dynamic range,該數據實在好重要,但為免自曝其短,喇叭與擴音機中夠膽寫清楚的真係絕無僅有,標明最大SPL數值喇叭,不及百份一,ATC PASSIVE 10 與 PMC某型號屬小數,因為當你知最大聲壓值就可輕易計算到全部,以我記憶當中祇有CD/DVD機之類有標明.

當晚,我將數計出來是(針對一對喇叭)的數值,去配合一部能發揮盡該喇叭的擴音機,而所有外來數值不計算在內,就祇是一部擴音機及一對喇叭的配搭！

I read your post contains some interesting calculations for matching speaker with amp, it involves some dB to W convertion.
i.e. if speaker's power handling is 250W
then equal to 10 x log(250) = 23.9dB

Then the matching should have around 23.9dBW.......(Correct me if I missed anything so far)

For the sake of discussion, here are the assumptions I assumed you have made for your calculation.

a. You need full power from power amp all the time.
b. The music you listen most contains full dynamic range all the time.

How true are above assumptions in reality?