I'm a newbie and new owner of Onkyo TX-SR605 and x-mtm, x-cs, x-subwoofer from AV123. First, I'll try to describe what happened to my previous/initial x-sub.
When I turned the sub (unhooked to Onkyo) red light switched to green; when I increased volume on the sub (still unhooked to my receiver) I heard increasing Uu-hh sound (now after a lot of AV123 forum reading I believe that the sub behaved abnormally). Then I bought a sub cable and hooked x-sub to SUB Pre OUT connector on Onkyo. Surprisingly, even when I turned off both Onkyo and the sub and then plugged the sub cable into Sub Pre out on Onkyo I clearly heard a sound of electric discharge. I turned on Onkyo and sub (now I think I should have not done that!), and the fuse on sub was burnt. I unhooked the sub from Onkyo, changed the fuse, turned it on - the fuse was burnt again.
Yesterday night I got a new sub amp plate and successfully replaced it. So now when I turn on the sub its red light turns on, and then it should switch to green upon incoming signal from my Onkyo. Is my understanding right? However green light never turns on. Moreover, when I go to Speaker Set Up on my receiver: sub - YES; crossover - 80 Hz; then upon Level Calibration I hear kind of P-sss-hh sound from all my 5 speakers. This sound is increasing when I increase volume on the receiver. But I hear NOTHING from my sub; when I increase volume or change crossover, or phase on the sub - still NOTHING. Should I hear the same kind of test sound from my sub?
So now I am worried very much - could my previous bad sub kill my Onkyo sub Pre Out connector? Or it's stupid suggestion given that other Onkyo functions seem to work. On the other hand I can't exclude another unfortunate possibility - an initial defect of Sub Pre out connector in my newly bought Onkyo. In this scenario, I have to hurry up to exchange my Onkyo. How can I check if Sub Pre out connector of my Onkyo functions properly independently on my uncertain x-sub?
Unfortunately, both Onkyo and X-sub are very new to me, before I've used Dn HTiB with unpowered sub with + & -connectors w/o any other regulators on it.
Any suggestions are highly appreciated.