@ easyrider,
i have worked in sound engineering for 20 years, until recently when i gave it up to career change into IT, from musical theatre to rock n roll, mostly touring.
my specialised area was sound design and frequency analysis, now i know from previous posts that you have had the room 'sounded out' and you have very common issues with reverb and acoustic' noise'
the baffles you have instaled are great, but i notice from the pics one area that will, and probaly is causing a problem due to the 'throw' of the tannoys.
this area is that back wall, have you thought about some drapes behind the sofa? all along that wall would be great, it would just eliminate any 'back slap' that might be confusing the sounding out of the room.
if you need a more comprehensive analysis of the room give me the total dimensions in a PM,
im sure i remeber how to apply the formula, for any other engineers out there, its 0.16 x (V) volume divided by (A) absorption coefficients, yeah? measured in (OW) open window units?
should be fun to do, funny enough i ejected all this info from my brain, for my IT degree, there is only sooo much room in your head after all lol
again a very very nice set up you have there, but you know that ehh?