Where to place - need some hand holding please

Try putting your sub in back of your just behind your chairs, I have a floor fire HSU Research sub and I like it back there best, also your rears are in cabinets, could wife let you put some dampening in behind those, it wont be that visible, maybe also pull your mains out a bit more into the room.

Wow. What a rig, what a room! Lovely woodwork. Tricky room acoustically.

There are many threads on speaker placement here at the 'gon, definitely give them a read. Also, contact Sonus Faber with a description and measurements of your room (include all your posted system pictures as well) and see what they suggest.

Experimenting with speaker placement can be quite fun. One key is to keep your attempted placements documented (measurements from back and side walls) so you know where you’ve been and what’s happening at each location. I typically start without any toe-in. Since you have a great sub, try finding a placement that yields great imaging and worry less about the bass response. When you are happy with the imaging, then start playing with toe-in, thinking of it as fine tuning.

Personally, I would move the Cremona out at least 3' off the back wall and at least 6' apart as a good starting point. Sub behind the seats is a great suggestion for your layout.

Remember to be patient and have fun while experimenting (I've fiddled around for weeks at a time to find the sweet spot). Good luck and happy listening.

If you want it in front, simply use the sub as a center speaker stand.

You may have to add a bit of "mass" to keep reasonace down, but it should work fine.

I really appreciate your responses. I am hoping for some handholding. Like I mentioned I have no experience and usually can hear no differences when playing with the placement. Frankly, no matter where I place them, the music sounds nothing like the auditioning rooms I had originally listened to them in.
I have done some research in speaker placement in this forum and found much of the opinions too difficult for me to understand. But based on my research I plan on taking the following steps, I would appreciate if someone can correct me if I am going about this wrong:
1) Play all the test tones on my test CD
2) Use my Radio Shack SPL meter in my sweat spot to ensure that they all read 75db.
3) Here is where I get confused. Lets say the 30hz test tone reads 79db, now what? I keep moving the speakers/subwoofer until I get the 75db response? Ok fine, now lets say that somewhere along the line I discover that say the 300hz test tone would get the 75db response when I place the speakers back at the original position. Now what? Do I have to choose which freq is more important to get the 75db response? Look for a compromise between the two freqs?

Thanks again in advance for any help,
David

This is posted in "tech talk" maybe it will help you

Radio Shack SPL Meter mods corrections
I know that others here were interested in the specs to correct the non-linearities of the factory stock RS SPL meter. The figures below are to be either added to (+) or subtracted from (-) the readings that you obtain from your factory stock meter. In other words, the meter in stock form is EXTREMELY deficient when it comes to taking low frequency measurements. Keep in mind that these corrections are only valid under the following conditions. The meter must be set to C weighting, using 1/3 octave pink noise (easily available from various CDs), with the mic pointed at the speaker. These measurements were verified on both the RS analogue and digital meters using laboratory grade test equipment. Baseline testing was done using the 80 dB scale for reference purposes. While on the low side, this should give you a good baseline as to what your actually getting out of your system. Needless to say, if you had BIG peaks in the bass region with the stock meter and you weren't calculating in these correction figures, you're in even worse shape than you thought.

10Hz +20.5
12.5Hz +16.5
16Hz +11.5
20Hz +7.5
25Hz +5
31.5Hz +3
40Hz +2.5
50Hz +1.5
63Hz +1.5
80Hz +1.5
100Hz +2
125Hz +0.5
160Hz -0.5
200Hz -0.5
250Hz +0.5
315Hz -0.5
400Hz 0
500Hz -0.5
630Hz 0
800Hz 0
1KHz 0
1.25Khz 0
1.6KHz -0.5
2Khz -1.5
2.5Khz -1.5
3.15Khz -1.5
4KHz -2
5KHz -2
6.3KHz -2
8KHz -2
10Khz -1
12.5KHz +0.5
16KHz 0
20KHz +1