active subwoofer

Hi, I have a problem with my new Marantz SR6010, it won't recognize my older UniQue JWS A8 Active Subwoofer, it won't even get me a test tone from the sub. It shouldn't be anything wrong with the sub since it works fine when I plug it into my old TEAC DR-H300 receiver. I've tried all the...

so i managed to get my hands on a very decent active sub from my dads friend when they were moving, only prob is it doesn't "always" turn on, sometimes it turn on, sometimes it doesn't, sometimes its really hard to turn on, the red light has a very fade glow and eventually activates, i feel as...