the most envoironmental friendly shall be UNPLUG, back to basic.

But Now, which Class D amp can totally win Class A amp?

不環保 shall be over 2000cc or turbo car and they should be ban.

＞＞＞a. I have 300B , and class D amp both

所有"膽"機仍以A類形式運作，談不上環保！

agreed. no one is perfect.

"""Today's electronic is highspeed, so the power can be generated instantly."""

do you mean the electronics or electricity travelled slower in the olden days than now?

and the power from power plants different for coal firing and nuclear generated?


"""So it does not requires "on" all the times."""

i would have thought the always on is related to shortening the time for warm up. even class a amps can be switched off when not in use.

These days, there are less straight class A hi-end amps but there are still a few examples I can think of: Pass Labs XA series, Lamm, Gryphon, Jadis.

I don’t think in Europe (or any non-authoritarian country) that there would be law to band certain classes of consumer technology. More likely other measures such as taxation and regulations to discourage wastes would be used.

cpu8088,

Speed of signal bandwidth is different from speed of electron movement. Bandwidth of electronics device has been increased a lot for the pass three decades. While comparing Intel 8088/8086 (in the old day) and Intel Quad-core (nowaday), you must see the difference. The clock speed is increased a lot, from the order of MHz to GHz.

For example, a lot of power transistors have much larger current gain bandwidth product than 3055 being used in some of the vintage amplifiers.

maybe, we can give the amp some component for supporting, thats 環保 and more efficient. such as Cryogenic Treatment http://www.sineworld.com/html/cryo.html
not only can improve the sound for WHOLE thing, but also save $$.
I read more english magazine to say this points. ( even my english is primary school level )

i was asking about "electronic" or electronics/electricity. not bandwidth or clock speed, current gains. if you cannot see the differences i cannot help in this regard.

＞＞所有"膽"機仍以A類形式運作，談不上環保！
PP膽機可以做A類及AB類!!
不能只計能源效益,一火的膽機可能比200火的D類省電!!

"do you mean the electronics or electricity travelled slower in the olden days than now?"
- electronics travelled??????????????? What were you asking?

What do your questions mean then?

"i was asking about "electronic" or electronics/electricity. not bandwidth or clock speed, current gains. if you cannot see the differences i cannot help in this regard."

If you are unable to notice the mistakes you made, then 巧言令色.

electronic is an adjective.

there was no mistake.

We should look for environment friendly way to enjoy music. I believe there should be way to product high end amp which is energy efficient and better than Class-A. In fact, some class-a amps are not sound that good either.

In the old days, manufactures have to say and make Class-A amp better as they are very good profit margin. Taxation and regulation and consumer buying criteria will push manufacturer to invent and push good alternatives. I won't be surprise that some manufacturers suddenly say other amp design is even better.

如果部機好聲耐用己是環保，因為你不會強迫自己去換機和製造垃圾！

真正唔環保係買咗唔好聲加上唔耐用嘅機，即係變相製造垃圾！

留家聽音樂唔出街搭車本身不是環保嗎? x 2

A類機 不環保.. ..100%完全對.

題外話:
我鐘意部機d聲靚,純,原汁. 但係發覺只有A類機先做到.
奈何都照舊用緊A類機. @_@"

environment friendly means using less resource to achieve one's purpose.....

It's pity that only my Amp can achive my purpose and it happens to be Class A...

I think it is no big deal since the mainstream is Class AB....
Most people are reluctant to have an additional heater to pursue better sound quality...

Using Class A Single End tube amp with full range speaker VS Class D driving Multi-Way Speaker with passive crossover should very close in power consumption, Tube amp loss power at amplification, but power output is effectively driving driver without crossover, while Class D convert electricity into driving current, but the passive crossover eaten the input power for driving driver unit.

"""while Class D convert electricity into driving current, but the passive crossover eaten the input power for driving driver unit."""

do u mean class a amps not converting electrical power into your so called "driving current"? without current how can a class a amp drive speakers?

efficiency of speakers with or without crossovers can be measured by sensitivity. there are many efficient speakers with passive crossovers.

一個人楂車去無雷公咁遠行個圈飲杯野,果d就好環保o既享受!?
要真係攪環保,所有工商業都要即刻停止(九成以上人即時乞米都無得乞),去晒耕田種樹,仲要自殺埋做肥料咁就最環保la, 唔洗消耗d資源.

唔好唔記得, 攪環保的人係有政府資源或有人讚助, 扮晒聖人果個都有楂車有食飯有用電有生仔有份消耗地球資源, 養活你同你一家的公司每日都生產未來圾垃(家用品,劣質傢具), 又或用大量紙張處理不必要文件 .

講環保!? 咪人講自己又講埋一分先得架? 部分係有外國勢力支持, 以環保做借口阻礙對手發展. 又或是用來做加稅借口!

攪個徒步進入非洲森林野營團就最環保la, 死左都可以做埋肥料.