請問適用的線徑?

正在準備要接給ADAM A7主動式喇叭的電源線,不曉得如何計算導體線徑,如果要搭配純銀線,請問若以A7的耗電計算,各極間需要多粗的線徑,才能有足夠的厚度呢?
ADAM A7 Features:
* Tweeter: A.R.T. tweeter
* Woofer: 6.5"
* Woofer free air resonance: 40Hz
* Woofer cone material: Rohacell / Carbon Fiber sandwich
* Built in amps: 2 x 50W RMS
* Frequency response: ±3dB 46Hz - 35kHz
* THD @ 80Hz < 1 %
* SPL max in 1 m > 105dB SPL
* Crossover frequency: 2.2kHz
* Inputs: balanced XLR and unbalanced RCA
* Input impedance: 10 kohms
* Warranty 2 years

ADAM A7 Features:
* Tweeter: A.R.T. tweeter
* Woofer: 6.5"
* Woofer free air resonance: 40Hz
* Woofer cone material: Rohacell / Carbon Fiber sandwich
* Built in amps: 2 x 50W RMS
* Frequency response: ±3dB 46Hz - 35kHz
* THD @ 80Hz < 1 %
* SPL max in 1 m > 105dB SPL
* Crossover frequency: 2.2kHz
* Inputs: balanced XLR and unbalanced RCA
* Input impedance: 10 kohms
* Warranty 2 years
