here's the situation in our new living room (our daughter moved to another town two years ago so we decided to convert her room to a living room):
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Any center speaker below the TV would need to be placed on the bars of the stand - not really a pleasing appearance. I cannot adjust the height of the TV. Placing two speakers on the sides would be pointless, since they would be too close to the side speakers.
Best greetings
Cyana