home cinema speaker placement

[hornetstinger]

Have following and wondering if can be tweaked placement for better sound

Room is
7.16m length
3.62m width widest
3.39m width narrowest
3.38m height

Room has two chimneys that are protruding into room. One fireplace. Second chimney is bricked up. Originally split living and dining rooms but it's been opened up.

Two doors, one leading to hall other to kitchen.

So halfway between 82 and 87 meters cubed.
Subwoofer is a single svs SB ultra 13.

From front facing wall to front edge of front speakers is 95cm
From front facing wall to my head 3.25m
Side speakers at my 3 and 9 o clock position
From front facing wall to rears 4.52m
From front facing wall to TV screen front is 64cm
Front left speaker middle of cabinet is 56cm from left wall
Front right speaker middle of cabinet is 1.12m front right wall
Sub is 1.01m from left wall.
All four front speakers grilles are more or less same line looking down the side.


1) do I have enough subwoofery considering the room size? Would another SB ultra 13 be worthwhile?
2) could the sofa and/or front four speakers be moved for better sound reproduction?

 

[Hedge]

Pics might make this easier to digest.