Right........ and update from me after a week.
First of all a huge huge thanks to all the forum members in helping out, special mention to
@Conrad. ( you were amazing with REW help and you are a LEGEND!) ,
@Ultrasonic for your placement advice ( hope you had a nice birthday),
@Ed Mullen for your impartial advice on SVS subs and looking at my initial graphs and suggesting to change my initial positions,
@DodgeTheViper for your insight into various subs, and
@Gasp3621 for your suggestions and keeping me down to earth, (I could have easily pulled the plug on 2 new subs last weekend). Couldn't have done this without all your help.
Had a bit of play around on my birthday last Monday ( what better day to do this without being told off by the family haha) with initial REW setup and getting to know time alignment with the new corner positions and finally did all the ARC calibration yesterday with time aligning mains and subs.
Here are the results below
My Current setup
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Sub Measurements before ARC calibration
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Post ARC calibration and sub time alignment
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Final graph after subs/ main delay adjusted ( Red)
View attachment 1455344
Well, I am sure many of you guys will be able to make it even better, but this is the best I could do after fiddling around the best part of yesterday and for me personally this is a huge achievement... getting to grips with REW, understanding time alignment, setting things properly and measuring subs properly on mains channel etc.
The proof is in the pudding and the whole system sounds fantastic. The soundstage has really expanded, hardly able to locate the subs and the integration is superb between mains and subs. The quality of the bass, dialogue clarity and sweet treble are icing on the cake. I have also noticed a huge improvement for music and I ended up listing to my favourite songs a lot last night.
I think I may have just about scratched that itch I had and most likely I will keep my current 12.17 Edge setup for now. I will think about the upgrade in 2 years time when I will have much clearer idea of the planned house redo and the options for dedicated HC room. I am sure 2 PB3000s in those locations will produce even better bass and response but sadly I cannot accommodate a PB3000 in right corner behind the Piano and 2XSB3000 may not be that hugely noticeable upgrade over what I have now.
Thanks again all
Sanjay