A couple of updates: 

I wanted to be able to easily stream music (wirelessly) to a system in our family room from my server located in the "terrace level" (otherwise known as a basement).  And my server has no analog outputs and was configured with two digital outputs, one with SPDIF and the other with AES/EBU.  The SPDIF was going to my Integra so I searched for an inexpensive (or used) DAC that supported AES/EBU and ended up with this USB DAC from Emotiva (http://shop.emotiva.com/collections/x-series/products/xda2). Since the purpose of the DAC was to get background music upstairs, I was not concerned about quality.   Well it turns out that this product is amazing.  It may not compare favorably to the dCS $77,000 stack but it is an amazing piece.  The product I used to wirelessly transmit the data (to both my family room and my office on the top floor) was this http://audioengineusa.com/Store/Audioengine-W3#.URD4Aujag_M).

 In addition, I had read so much about the qøl™ – signal completion stage (in TAS and Stereophile) and their 30 day home trial, I decided to give this a go as well.  My conclusions are not yet final but this is a very cool piece, albeit, in my opinion, overpriced.  They need to do the Audyssey thing and get this technology imbedded into preamps and surround processors.  The problem I needed to solve if I keep this unit is how to integrate it into my system so that it gets a feed for the full music spectrum.  So, if I used the LR outputs of my Integra, I would not get the feed for bass, assuming I did not use the Integra in Direct Mode which would then mean I had no EQ on my system. 

So enter yet another box/product that I have purchased and that is the Anti-Mode 2.0 Dual Core (http://www.dspeaker.com/en/products/20-dual-core.shtml).  Now THIS is an amazing product.  It provides digital room correction up to about 500 hz, a built in mini-screen to see the before/after of the correction, has memories for storing various correction filters, has an instantaneous ability to add a bit of user defined bass boost (which I use when listening to movies) and a bunch of other capabilities too numerous to mention. (In a full disclosure, I like this product so much I became a dealer for them.  If interested, send me a PM).  The correction it did on my bass compared to Audyssey Pro was very impressive. 

The initial reason for the purchase of the Dual Core was to see if I could get more out of my 4 SubMersives.  The front combined with the rear subs created a very nice FR but the front subs had a very wide dip that the rear subs corrected but, I postulate, at the expense of giving up some slam.  So the plan was to use the Dual Core to flatten out the front subs and THEN run Audyssey.  That experiment is still on-going.

So back to potential implementation of the qøl™, I still potentially needed another piece to make it all work and am considering a very nifty preamp from Emotiva that I found by accident.  It is an analog stereo preamp (see http://shop.emotiva.com/collections/processors/products/xsp1) that supports 2.1 or 2.2 systems providing the ability to set crossover points, adjust the level of each side, etc and provides full HT pass-thru so that your pre-pro can have direct access to both the mains and the subs. I am not familiar with any other analog preamp that offers this capability – at any price.  Combine this piece with the Dual Core and ---- viola!!

I am still experimenting so we shall see.  And I thought I was through. Once everything is in place and have made the decisions to keep all of the components, I will try to draw a schematic on how it is all connected.

So the plan was to use the Dual Core to flatten out the front subs and THEN run Audyssey."

I hope to accomplish the same thing shortly with a Xilica XP3060.  It has 3 independent inputs and 4 outputs,  so I hope to be able to individually time align and EQ the 4 subs, then pair them back to the dual outputs of my Marantz with Audyssey.