obee
發表於 2012-2-1 00:44
有無D政黨/特首侯選人會爭取政府派錢支助hifi油,又或者打擊無良hifi商人架... ...
Lester 發表於 2012-2-1 00:30 http://www.post76.com/discuss/images/common/back.gif
{:6_175:} {:6_176:} {:6_228:}
早D休息啦.
Wilmer威馬
發表於 2012-2-1 00:52
其實,DIGITAL AMP = CLASS D = CLASS T,太深入講我驚大家唔明,總之所有呢類 amp,正式应该叫 PWM SWITCHING AMPLIFIER,所以 DIGITAL AMP 好、CLASS D 好、定 CLASS T 好,係指用 PWM 方式以開關方式工作 o既放大電路。
而 Lyngdorf o既所谓 True Digital Amplifier 只係一种冇左 analog 輸入調頻轉 PWM 轉换 o既 CLASS D,加上開關速度夠高夠快,可以直接用 PCM 訊號代替 PWM 輸入級,但依然只係一部 CLASS D,某程度上仲慳皮左。
打個比喻,正常一部 amp 有前級部份同後級部份,Lyngdorf o既所谓 True Digital Amplifier 只係冇左前级,再改改後級部份 o既参數去補償返冇左前级 o既影響。
至於 CLASS T(或 T-AMP),工業上根本冇呢樣野存在,只係近年 TRIPATH 芯片令 CLASS D 咸魚返生,TRIPATH 個朵太響,市場就取其“T” 標奇立异(http://en.wikipedia.org/wiki/Class_T_amplifier),講到尾都係 PWM 或 CLASS D,真係要從技術層面講,大部份 CLASS T 只係半部 PWM amp,因为 TRIPATH o既電流輸出級係屬於單端 A/B,所以 T-AMP 曾一度吹成似 300B 聲。
nicknick
發表於 2012-2-1 12:12
其實,DIGITAL AMP = CLASS D = CLASS T,太深入講我驚大家唔明,總之所有呢類 amp,正式应该叫 PWM SWITCH ...
Wilmer威馬 發表於 2012-2-1 00:52 http://www.post76.com/discuss/images/common/back.gif
多謝威馬兄的意見,我地又有野學。{:6_193:}
obee
發表於 2012-2-1 12:22
其實,DIGITAL AMP = CLASS D = CLASS T,太深入講我驚大家唔明,總之所有呢類 amp,正式应该叫 PWM SWITCH ...
Wilmer威馬 發表於 2012-2-1 00:52 http://m.post76.com/discuss/images/common/back.gif
唔該晒馬爺!學左好多野!
咁我想問好似「好好好」師兄嘅要求(我估佢係想用最簡單,直接嘅方式由電腦file 出到聲),可以點做?
Lester
發表於 2012-2-1 12:30
唔該晒馬爺!學左好多野!
咁我想問好似「好好好」師兄嘅要求(我估佢係想用最簡單,直接嘅方式由電腦fil ...
kenneth_obee 發表於 2012-2-1 12:22 http://www.post76.com/discuss/images/common/back.gif
ipod + head phone...
nicknick
發表於 2012-2-1 12:37
唔該晒馬爺!學左好多野!
咁我想問好似「好好好」師兄嘅要求(我估佢係想用最簡單,直接嘅方式由電腦fil ...
kenneth_obee 發表於 2012-2-1 12:22 http://www.post76.com/discuss/images/common/back.gif
小弟插個咀說說個人意見,如果想接駁簡單又好聲,
我會選擇有音量控制能直駁後級的DAC,按樓主要求是要有USB輸入的,然後直駁一對active speaker。
咁就 電腦 > DAC > active speaker,
簡單好聽。
sokwan
發表於 2012-2-1 12:43
Thanks a lot for Wilmer's explanation.
I think the most famous class D amps (besides TACT) are Nuforce (whic designs its own circuits), Jeff Rowland series, Bel Canto, Accoutic Realty and W4S (which all uses B&O circuits). I have been using Flying Mole class D amps since 2005 for my LS3/5a in my little bedroom until lately. The good things about class D amp is compact, light and have little heat.
Any chings have ideas about class-I amp by Crown?
Wilmer威馬
發表於 2012-2-1 12:54
唔該晒馬爺!學左好多野!
咁我想問好似「好好好」師兄嘅要求(我估佢係想用最簡單,直接嘅方式由電腦fil ...
kenneth_obee 發表於 2012-2-1 12:22 http://www.post76.com/discuss/images/common/back.gif
我唔知有冇 digital amp 已內建 24/192 USB,冇就可以用一個 USB 轉同軸入 Lyngdorf,或者如果冇喇叭或可以玩多對喇叭,就學似 nicknick 建議,一部有 PREAMP o既 USB DAC + ACTIVE 喇叭。
By the way,國產都有同 Lyngdorf 同類 o既 True Digital Amp:
http://item.taobao.com/item.htm?id=12528720207
http://item.taobao.com/item.htm?id=9439021146
Lester
發表於 2012-2-1 12:59
回復 26# nicknick
佢想要一部player+dac+amp既野
Wilmer威馬
發表於 2012-2-1 13:01
Any chings have ideas about class-I amp by Crown?
sokwan 發表於 2012-2-1 12:43 http://www.post76.com/discuss/images/common/back.gif
http://www.crownaudio.com/pdf/amps/137234.pdf
http://en.wikipedia.org/wiki/Electronic_amplifier
Class I similar to Class T, just a commercial gimmick of a brand name.
頁:
1
2
[3]
4
5
6
7
8
9
10