The Most Common Youtube增加訂閱 Debate Isn't as Black and White as You Might Think
http://andreadig272.trexgame.net/8-go-to-resources-about-youtube-mai-ding-yue
Even cables with crafted-in repeaters frequently allow for an exterior power provide to get attached. This is certainly just a bit extra safety for the signal and could be a good idea dependant upon the circumstance