Subwoofer Settings

Found it. This is the explanation I was looking for.
" If you are using one subwoofer for the bass of both left and Right Channels, connect the Left and Right preamp Outputs for these channels to the corresponding Line In connections of the STA-400D. Normally the High Pass Outputs of the STA-400D will be connected to the Inputs of thepower amplifier for the main Left and Right speakers. Using the High Pass Outputs will send all frequencies above 80Hz with a -12 dB per octave slope to the power amplifier for your speakers.

The Low Pass filter control on the STA-400D should be adjusted to provide the best integration of your speakers with the subwoofer. If you are using two subwoofers (one for each channel), connect as above using one sub for the Left channel and one sub for the right channel."

Deep breaths, LOL now you know what it's like to be a mechanic? When all else fails read the book over and over and over until you do. :-)

Good deal

Regards

I think I have some comprehension issues. And ADD. And impatience. And stubbornness. And...

I have the same room size.  I purchase a pair of REL S2 SHO subwoofers and placed them in the corners pointed in the same exact direction to the listening position in the room.  I moved my towers from the back wall and measured the exact distance from the back wall, side walls and angled them the same.  I used a tape measure to make sure things were equal on both sides.  Still would like to do a master set.  However, I think I might be close by the way I positioned my main speakers and subwoofers.

I set my subs at about 40% or until they acted more like woofers than subwoofers.  You don't want to hear the subs you want to blend them.  Having two subwoofers helps to blend in the bass.  All you want to do is extend the bass below the main speakers and do so smoothly.  If you hear the subs too much back them off.  This took me a few days of listening to find the right settings.  This is how I set my system up and it really sounds great and it also took some work off my towers to clear them up.  Still would like to buy a pair of SALK Song2 Encores.  They are incredible for $6,000.

Hope this helps.  I don't know much as the rest of the group, but I dialed them in for my ears and the size of the room.  I noticed I widened the sound stage.

I have an ARCAM AVR550, Paradigm 85F towers and a Bluesound Node 2i.  I also used CAT6 cable to connect the Bluesound to my modem.  I this might have improved performance.

There is so much to learn and this group is a big help.  Listen to their advice, as many are dealers and they know what they are talking about.

I meant to mention.  I did a lot of research on the subwoofers and determined the high level connection used by REL made sense.  This really helps to make the subwoofers act more like woofers to extend the bass.  I also thought the Rythmic subwoofers were a great choice.  However, Rythmic sells direct and there was no way for me to audition them.  I never have been a big fan of SVS.  I think they are more for home theater than for listening to music.  I also have read a lot about subwoofers and I think having two subwoofers are the way to go.  They just balance better.  I was looking at the REL T9's, but decided to go with the REL S2 SHO's.  I think bigger subs playing them with less power might help to balance the room better.  The big thing is to not over power the subs.  You certainly do not want to hear thumping base in my opinion.  All you want to do is smoothly extend the base of your main speakers.  This seems to clear up the mids and highs on the main speakers as well.