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
A link to a pic of your room would help a lot to improve and facilitate good recommendations for you.
OK, I just ordered the Krell 2250 Amplifier and will be using (for now) my Mrantz as the pre amp for the Sonus Fabers.  I know there is a matching pre amp that is recommeded the Krell 280p I believe it is, and I am considering this but also have read A LOT that a tube pre with this Amp is very ideal.
Caphill - Thank you very much for all your input, you made me do a lot of research.  I decided to go with the stereo amp because it seems to provide a better tone and power for just musical playback and if I can match it with a tube pre I may be right where I want to be.  Once I have the Krell in line and get to listen to it for a while and build back up my Audio Budget, I will be on the hunt for the pre.
I will also be using the  "MASTER SET" SPEAKER POSITIONING once everything is hooked up and I will be looking at different room treatment options that can blend with our living room.

Thank you all so much and I will update this when the Amp comes in and I get a few hours out of it!
Since you are now going be using your 6012 as a pre-amp, you will need a set of interconnects to connect to the Krell.  Now, unless you get very good interconnects, you may actually experience a LOSS of audio quality in terms of fine detail, texture, high frequency extension, and possibly bass extension.  I know because I've been using my AVRs for years in this fashion, i.e., with a separate power amp.  I you notice some loss in audio quality, don't let anyone tell you that cables can't make that much difference, trust your ears.  You may have to experiment with multiple interconnects. 
1) Don’t let anyone tell you the Marantz isn’t good enough, it is more than good enough. 
 
2) SF’s Venere line is not warm, I’d say they are even a tad bright. 
 
3) Did you try with no toe-in? Listening at 30° off axis (assuming you are in an equilateral triangle) will for sure make them sound more warm, and they image well so no issues with doing that. 
 
4) That DefTech sub in actuality is pretty lacking, despite what you said, $500 for a 7.5” subwoofer is a rip off unless you cannot fit a bigger sub. A Rythmik L12 is around the same price and is much better. 
 
5) adding a tube preamp won’t change the sound one bit if you still run Audyssey, and if you don’t, it will make the speaker bright again, most likely more than the warmth added from the tube preamp. 
 
6) If no toe-in srill isn’t warm enough, try extreme toe-in, having the speakers angled 15° past you (intersecting a foot or two in front of you). 
 
7) Play with placement from the front wall as well as the sidewalls. 
 
8) Adjust your seating distance from the rear wall.