Why are my SF Venere S Speakers not sounding as warm?


I have a beautiful pair of Walnut Sonus Faber Venere S speakers and I use them for everyday surround sound/music listening in our living room.  The issue is I fell in love with these speakers in the showroom, and when I set them up in my living room they sounded almost piercingly bright and not nearly as balanced and pleasant.  I have bi amped them with my Marantz SR 6012 Surround Receiver, ran the room EQ set up as well as tried to manually EQ the system.  I was able to take some of the brightness out and get them to a more balanced sound.  I am VERY happy at the un-hindered sound quality they produce.  However there is not near as much bass as there seemed to be in the showroom (I had them disconnect the separate sub).  Now I understand my room is not treated and that of course makes a difference.  I added a Definitive Technology SuperCube 2000 and that has helped, surprising amount of bass for such a small discreet sub.  What are your suggestions?  What am I missing on the set up of these speakers to get the full range from them?

We have a tile floor and a raised ceiling that is at an angle from approx 9' up to 15'.  We have a large fabric couch with an area rug and wooden coffee table.  The dimensions of the room are approximately 14' deep and 19' wide.

tice34
The power amp I ordered has both XLR and RCA, but with everything I have read I need to send it a balanced signal so I need to find a cable that I can plug RCA into the Mrantz and XLR to the amp.  So same setup you have looks like.  But I don't have a cable budget any where near that high.
mzkmxcv,
Thank you I am going to play with the placement when I get the new amp in and up and running.  I will definitely be planning a chunk of time for that.  I can see what you are telling me about the Audyssey, so far I am not a fan of that system.  Or at least I have not figured out how to use it to my advantage yet.  And the sub was purchased out of necessity regarding the size right now, it fills the room decent enough, but tucks away out of sight which is what I needed to keep the Mrs. happy ;)

The Marantz 6012 has no balanced circuitry, so there is no reason to connect to the amp's XLR inputs.  I think you just need the best RCA interconnects you can get. 

Wireworld Silver Eclipse 6, 7, or 8 seems to be a very nice sounding interconnect that you can often find used here on Agon.  For more cable suggestions, you might try asking in the Audiogon cables forum.
Your Marantz SR6012 receiver has no XLR pre-outs. You can use a pair of RCA cables to connect to your Krell stereo power amp. But still for your stereo music playbacks you will need to get a separate dedicated stereo preamp with HT bypass. And connect your front end source components(s) for your stereo music directly to a stereo preamp. So when listening to stereo music materials you don't even have to turn on your Marantz SR6012 receiver at all. 
The Marantz receiver's preamp section isn't good at all for stereo music playbacks. 
@tice34  
  
For Audyssey, use all 8 microphone positions. The first one should be dead centered where you sit, all other 7 should be where your head could be if you are slouching, leaning forwards, they should not be more than 3ft from the 1st position. Also, try to avoid placing it right up against any headrests.
 
Have Dynamic Volume (a dynamic compressor) off.
 
Have Dynamic EQ on. However, it’s default is for the typical mastering of movies, change the Reference Offset based on the type of content you listen to. 5dB for classical, 10dB for tv/pop/hip-hop, 15dB for heavily dynamically compressed music (a lot of metal/rock). I watch a lot of movies and tv and play a lot of hip-hop, so I go in the middle and choose 5dB, as the movie default results in way too much bass for music. 
 
What Dynamic EQ does is use the Equal Loudness Contours to adjust the frequency response based on playback levels, so that it always sounds neutral. However, you have probably noticed that if you play a movie on your system and then switch a pop/hip-hop song, you lower be volume, so that throws the Dynamic EQ off because they are mastered to different levels, so that’s why the offset is available. 
 
If you feel you can’t get Dynamic EQ to work with your tastes, then it off. 
 
If you feel you can’t get Audyssey right, use the L/R bypass, so it only corrects the subwoofer.