After changing the order once, I decided to go back to the Samsung HW Q90R Soundbar with its standard rear speakers. They will be delivered and installed in 2 weeks. \n\nThe issue is that about the only spots where the rear speakers can be placed effectively and proportionately are tops of built-in furniture cabinets immediately behind the listening position. They'll be at the same level and same distance from the listener but rather high - top of doorway height. I got around this issue by deciding to position them tilting slightly downwards and turned towards the listening position using acoustic pads.\n\nThe only likely problem with that arrangement is that at 21 cm tall standing them upright in the space available between the shelves and ceiling could be rather tight. There is 26 cm space, but I have to allow for acoustic padding to act as tilting wedges. It may still be just about OK but if not, one possible solution is to place the rear speakers on their sides instead of the usual upright position. The trouble is that I was not sure (still not) if this will affect their functionality.\n\nI asked Tech support at Samsung UK and they said that the rear speakers could be placed on their sides without problems but IMO they did not sound very convincing. Can anyone here advise, please?