OK so firstly hello everyone from sunny Scotland 

 as most of you American cousins will be aware us Scots are known the world over as being as tight as a ducks! eh well, I need some advice cause im poor and can hardly afford my porridge oats let alone AV equipment,,, i digress 
OK here is what i have
sony str dh790 
Eltax monitor atm dolby atmos speakers 
yamaha NSF51 floor standers 
q acoustics 3090c centre 
q acoustic 3020 rears  
KEF1 subwooofer 
and soon to be a wharfdale sw150 along with the kef
and i just feel i cant get that boom from the base or decent sound from the dolby atmos. the dolby speakers are setup on top of my yams and just don't seem to give a lot of presence sound (i have low ceilings and have set the amp accordingly to 2m height) the subs i have are single rca in to the left rca in but i feel its the amp thats not producing the boom and i cant find any settings on the amp apart from volume up or down and + or - 10db or set to 0 
Any advice on how to set what i have up? cause the wife would divorce me if i say im going to spend anymore cash. thanks 
Have all speakers set to small