請問什麼才是前後級配合的阻抗?

Einstein

請問什麼才是前後級配合的阻抗? 經常聽說前後級配合的阻抗對音質很重要, 但如要換前級, 怎麼樣的阻抗才是配合?請指教:



我CPA1前級的spec:

Preamplifier Inputs        1 pair balanced XLR connections
6 pair single-ended RCA connections
Preamplifier Outputs         1 pair balanced XLR connections
2 pair RCA connections
Controller Connectors        1 - 3.5mm “mini plug” jack for IR input
3 - 3.5mm “mini plug” jack for trigger out
RS 232 full remote configuration interface
Volume Control Range        63.0 dB
Gain Resolution        1.0 dB steps
Input Impedance        100k Ohms on RCA
200k Ohms on XLR
Rated Output        RCA - 1 Volt (8 volts maximum)
XLR - 2 Volts (16 volts maximum)
THD+N        <0.001%
Frequency Response        + 0.1 dB from 5 Hz to 100 kHz
Signal-to-Noise Ratio        120 dB "A" weighted
Voltage Gain        26.8 dB
Power Input        110/117 or 220/234 Volts AC @ 50-60 Hz
Power Consumption        50 watts
Weight        22 lbs.
Dimensions        4.5" H x 17" W x 13" D
       


我CAA1後級的spec:

Inputs        1 pair balanced XLR connections
1 pair RCA connections
Input Sensitivity         0.7 V (full-rated output)
Controller Connectors        3 - 3.5mm “mini plug” jack for trigger input
4 - custom speaker binding posts
Input Impedance        100k Ohms on RCA, 200k Ohms on XLR
Damping Factor         >1,000 @ 8 Ohms
Rated Power Output        125 watts/channel rms. @ 8 Ohms
250 watts/channel rms. @ 4 Ohms
THD+N        <0.2%
Frequency Response        + 0.5 dB from 20 Hz to 50 kHz
Signal-to-Noise Ratio        -80 dB CCIR
Voltage Gain        27.2 dB
Power Input        110/117 or 220/234 Volts AC @ 50-60 Hz
Power Consumption        450 watts - Operation
50 watts - Idle
0.5 watts - Standby
Weight        20 lbs.
Dimensions        4.5" H x 17" W x 13" D
       

beerboy

d乜大師高人出黎答下啦....我都好想知。

chhanthony

beerboy 發表於 2013-5-15 13:49
d乜大師高人出黎答下啦....我都好想知。

beer 大師

beerboy

chhanthony 發表於 2013-5-15 14:55
beer 大師

我都話我唔係咩大師囉。我窮人新手一名only....

chhanthony

beerboy 發表於 2013-5-15 15:13
我都話我唔係咩大師囉。我窮人新手一名only....

金磚四角窮人

Siu

我都想知

呢個問題，每次問人，d人開頭都好似好高手咁，之後越講越玄。。。。一係一大堆電子術語。。。。最後都係話“一套西裝”。。。。

我只知阻抗唔夾有機會好大聲或者好細聲。。。。

KING

嘩!沙王師兄你黎又考人啦! 我都唔係咩野高人,祇係識得D皮毛咋!,有錯大家莫怪呀!
唔講聲音取向夾唔夾祇係講數據,理論上要睇前級的輸出抗阻, 要求後級輸入抗阻基本起碼要多前級20倍或以上,
咁個低音就會出得到,同埋出得靚,高音大聲都唔會叫!

beerboy

chhanthony 發表於 2013-5-15 15:49
金磚四角窮人

ANWKLO

KING 發表於 2013-5-15 17:31
嘩!沙王師兄你黎又考人啦! 我都唔係咩野高人,祇係識得D皮毛咋!,有錯大家莫怪呀!
唔講聲音取向夾 ...

每間廠的標示方式都有的唔同, 就樓主的Cary都唔識睇

kkkiu

你問呢個問題，都係想夾聲姐.....計我話.......





















一套西裝啦~~!!唔好打頭!!
好啦...我奇怪緊，咁既然係問阻抗是否匹配，咁點解無人留意到規格只有後級的Input Impedance，而無前級的Output Impedance???