PSW10 Speaker Level Inputs/Outputs or Line In?

Hello,
I believe you have connected everything correctly between the Russound and the subwoofer. I don't believe using both the speaker level input and the line level input with both the receiver and the amplifier would be a good idea. It is possible there would be an internal connection between the speaker level and line level inputs that could result in shorting one or both together.
Keep in mind the speaker level output connection, on the PSW10, is unfiltered, meaning there is no change in the speaker level signal as it leaves the speaker level output of the sub. So, there shouldn't be much harm to overall fidelity using the connection method you've tried.
With that said, probably the best plan for future goals for your system might be to find a second subwoofer and eliminate the Russound box. While I'm sure it is a fine device, it is probably effecting the potential between the power amplifier and the speakers somewhat (especially if as your username suggests you are a vinyl listener).
You may also want to experiment on a few different low pass settings to see which one might be the optimum blending between speakers and sub.
Regards, Ken

Hi VV,
There are those (Paul McGowan of PS Audio) who recommend always using the speaker level inputs on a subwoofer. They maintain that since every amplifier has a sonic signature it is a good idea to pass that signature along to the subwoofer so the sound character of the main speakers will share these sound qualities with the subwoofer.
In theory once the front channels have been setup as "large" all bass information is routed to the front and then to the subwoofer. Like most subjects in audio there will be people who support the opposite opinion.
Probably the Monitor 30 begin rolling off their low frequency information around 100Hz and be down at least -3dB at 55Hz, depending upon their relative placement to large room boundaries. It would be nice to have a pink noise generator and an RTA to actually see the frequency response. Some of the CP members can recommend a way to use your computer to do this.
It's nice to have another vinyl enthusiast posting.
Cheers, Ken

VV and Kenneth, figured I could chime in with an experience that goes counter to the advice of using line level inputs/outputs with the sub.

I have a 2.1 setup, with Polk Monitor 7c's and a Polk PSW10 all hooked up to a JVC RX5000V receiver. I use them primarily for listening to CDs on my JVC XL-F154 cd player.

Originally, after doing my research, I decided the "bypass method" as described by Kenneth was the way to go. I bypassed the receiver's sub handling in favor of the PSW10's. To do that, I had the 7c's hooked directly to the sub via line level inputs, then connected the sub to the receiver using the line level outputs. I thought it sounded pretty good. I played with the crossover, volume, and phase until i found the best settings on the PSW10.

One day way later I was changing up my room arrangement, hookups, tidying cables, etc., I wondered what would happen if I hooked it all up the "wrong" way: 7c's directly to the receiver, sub directly to the receiver via typical LFE and sub out. Suffice it to say, it blew the other setup out the window! The difference had me in disbelief how much better it was letting the receiver do its thing. The 7c's had suddenly come to life. It was like they were struggling for air before and now they could finally breathe. It sounded subjectively 30-40% better, and I didn't realize how much low end the 7c's could really bring to the table until that moment. The PSW10 supported the low low end pretty well, and it all came together. But with the previous setup, its like the 7cs low end was being choked, as well as its midrange for some reason too.

I don't understand why, just thought I should share.

Does my relatively anonymous receiver actually have decent sub crossover handling? Was it the PSW10's lack of decent handling? I don't know, but I've gathered the PSW10 hasn't had the best reputation as far as Polk subs go.