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The eye distance is the distance from the middle of the width of the sofa to the TV wall, which means that the distance from you sitting on the sofa to the TV wall is about 3 meters, 42 or 46 is appropriate. As for which of the two to choose, no matter which one you choose, it is appropriate.
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42-47 If it's bigger, it hurts your eyes.
It's quite appropriate, in fact, you can find something to compare these things, and you will know for yourself.
The reasonable viewing distance of various TVs is shown in the following table: >>>More
You can try the 50-inch one, the 42-inch one is too small, and the 50-inch one is recommended.
It's too big and it's not good for the eyes.
If you also want to install a stereo, it will take about a meter of space, and with the position of your sofa, the distance between you and the TV is only a little more than 2 meters. >>>More
The distance from the sofa wall to the TV wall is about meters, you can choose a 50-inch TV, and the projection screen can be appropriately larger. >>>More