Speaker Placement


Hi
I just finished my Audio Room and need help regarding speaker placement. The room is 20ft long by 16ft wide with ceiling height 8ft 9 inches. This is located in a basement all poured concrete. The front half of the room is carpeted while the back is wooden floor. If I sit facing the speakers the right wall is all uneven stonework and on the left I have placed some DIY panels at the first reflection points. Behind the speakers I have placed 2 DIY corner traps. So far the ceiling is bare and I have no panels behind the speakers. I have placed the speakers 3ft from the side wall and 4ft from the front wall all measured at the centre of the drivers. While the sound is very good (no bass bloat ect.) I am unable to get a good sound stage.  The seating position is about 3ft from the back wall. 
My 2 Ch. equipment is as follows. 
Speakers B&W 800D (Not Diamonds)
Power Amp Krell KRS 200 Mono Blocks
Pre Krell KRC 3
Sources Cambridge Audio Stream Magic V1 and Clear Audio DC Performance with Dynavector D17.
Phono is Project Tube Box DS. 

I just want input if this sounds right as far as the placement goes. Should I try and move the speakers closer together? 

Thanks
srafi
To widen the sweet spot try crossing the axis of your speakers several feet in front of your present listening chair. That should do it, but you are still talking about a fairly focused image that will be appreciated by several people sitting in front of the speakers. If you want something more than that you probably need something like 'omni' speakers which would do a much better job of filling a room (at considerable loss of specificity).
If you start with the premise that most speakers are too far apart (one supposes because somebody assumed that placing them far apart would provide a bigger, wider soundstage) then you’re on the right track. If you start out with the speakers much closer together - say 4 feet apart -then use the speaker placement track on the XLO Test CD which if memory serves is actually the out of phase track, moving the speakers very gradually apart and listening as you go you will undoubtedly discover the placement where the sound all comes together. When I had Fulton floor standing speakers that sweet spot turned out to be five feet apart.

Ok Srafi,
    Thanks for the answers,  here you go,  this will get you a soundstage...
Speakers..... 3ft off each side wall.... 4 ft off the back wall.  This should place them approx. 10ft apart.  Listening Chair.... 9 to 9.5ft centered in front of your speakers...  You will still need a throw rug On the floor in front of your sitting position and you will need something to dampen the wall behind your sitting position.  A curtain or rug hanging on the wall should work wonders. Measure the distance between your midbass phase caps, this should be the same distance as your markers on the back of the chairs. (explained next)  This should leave around 7 ft to the wall behind the speakers.... Sit in your chair,  Put objects on the back of the chair approximately 6 inches on each side of your head is as markers... so, you'll have 2 phones,  2 calculators, 2 butter knifes,  what it is doesn't matter.  These will mark where you point your speakers.  Tow your speakers in to point directly at these 2 points.  The tow will help tremendously on getting rid of interactions with hard side walls. .  If you have any mid or high frequency peaks, start moving your tow outwards, be aware, as you get close to speaker dispursement properties hitting your wall, this will effect frequencies and sound stage. 
Overall, this will put your very close to where you need to be and will pull a soundstage.  It will not compensate completely for all room problems,  but the rug and padded rear wall along with the carpet on the front of the room will help tremendously. 
10 ft away is a good distance.  After listening for awhile,  I would experiment with padding on the ceiling between your speakers and listening chair.  I hope this helps,  Tim

By the Srafi,

  the speakers in between your speakers and sofa have to go... I do fear that you'll need a few ceiling tiles, decent size rug in front of the sofa and on the wall behind, Not necessarily in the center, but toward the corners, you'll need some sort of soft material... curtain or rugs hanging.  You might be seeing that we are somewhat dealing with the room as well as a decent placement.  I hope all of this makes sense, its not always easy to get the point across on a forum like this.

Tim

Sorry Srafi,  my fingers are faster than my mind... that was the chairs between your speakers and sofa need to go.