There are no curtains, unfortunately (despite the nom de plume Marco gave me years ago! )

James is correct, that the SP1's are front ported, so that may help, but the room has hardly any absorbent material apart from the rug. The yellow "cubes" are material covered, so I may try stacking the two spare ones on top of the ones behind the speaker later.

I've given the Bass control a boost of +2 and that helps - usually don't like tone controls but that's what they're there for! It was sounding very good just through the iPad headphones, I have a Fiio USB DAC to play with later. And that's part of the fun - all the experimentation.

The TV is only 65" Barry, probably looks bigger due to the angle I took the photo at. I could mount it on the wall to the left of it above the fireplace (the wiring is already there in the wall) but IMO it would be too high and you'd be craning your neck - although that would be ideal, with the speakers either side.