Hopefully someone can help me here.
I got my LFM-1 EX today.I powered it on and turned the volume to max, there is a humming sound with only one end of the subwoofer connected. I didn't connect the other end to receiver. If I turn the knob down, I don't hear the humming sound. When I switch it to X-over active I don't hear the hum.
When I connect the other end to receiver, only on the highest volume I get nice bass from the subwoofer.

Can some one help me please.

Thanks,
Ray.