Ya know I'm not sure that's why I'm asking. What I've read is that the pro amps when connected to recievers vs DJ equipment have some sort of feed back through the sub. So while I'm waiting for my crown to arrive I was wondering if I should buy Anthony else.
You might need some type of high pass or low pass filter, but nothing like your describing just because you have a pro-amp. Some folks run a signal booster, like a Samson S-covert, in order to boost the signal going out of the receiver and into the amp, but that seems to only be needed on some receivers and I believe that your Onkyo will not need one.
^^^ Same here. The interference you speak of is kind of hit or miss. Some folks have a bad ground loop hum from their cable box not being grounded in the same spot, or other things on the same breaker as their system. Bottom line, you should just build out and then plug n play to see if this is an issue before you buy something for potentially a problem you might never have. In the event you ARE getting noise on the line, jensen makes some good stuff, as well as some cheaper options like the ground isolator for your coaxial line.
Added a Crown XLS 2500 between my two RTiA9's/SC-67 and got a disturbing hum.
I re-read this thread again and decided to start with my cable box. First I disconnected the power, that didn't help. Then I disconnected my cable box HDMI from my Pioneer SC-67 and voila, no more hum.
I know this is old but i just wanted to add when i connected the Crown i had a terrible hum. I had a computer power cord that didn't have the round ground plug So i swapped them then plugged it into the Monster surge protector and hum was gone. Its almost been a year and still running flawless.