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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
timlub
2,039 posts
 
I can't tell much of how your room looks from that video,  but tow in is a different animal as far as tonal balance... a full tow pointing at the ears should be as close as you can get to the actual frequency response of your speaker. As you turn the speakers outward, you star rolling off the top end - mid,  the farther you turn toward straight, the more you roll off the top,  at some point,  you will start dealing with the interaction of your speakers dispersion bouncing off the side wall and that will also effect your tonal balance along with the top end roll off.  Then with panel speakers or baffleless designs, you have to deal with frequencies being projected from both sides of the speaker.  With these 2 designs, you have much more room interaction to deal with.... My post were mainly directed to the Op who is using a standard baffle mount drivers with his B&W's
timlub
2,039 posts
 
Also,  in any room,  if you have a peak or dip due to room interaction, as you turn it up,  those anomalies grow substantially...  
aryo
5 posts
 
Thank you timlub for your insight. Using REW, there is a dip around 200Hz. I have also deliberately created peak at the bottom frequencies because a flat response did not sound attractive. 

The strange think is contrary to a slight bump around 5kHz in REW measurement, the actual spectrogram of musical content shows a loss around 5khz. When speakers turned outwards the intense of HF reduces but evenly spread. In the video, the changes can be heard every 15 seconds.

When listening to each position individually without referencing to the original recordings, all of the people who auditioned preferred the intense and  clear sounding 15 second setup. However, when the same sound heard referenced to the original the preference changes. 

You are right that line array bipolar speakers may behave differently. 
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