The Epson EH-TW9400 is a projector on the edge of greatness. At £2549, it belongs in a category of machines positioned just before the big step up in price to native 4K projection. But this one uses Epson’s 4K Enhancement pixel shifting technology to display that higher resolution.

It’s a tried and tested method that has proved pretty solid, whether performed by Epson, or by projectors made by other manufacturers. Of course, it’s not a native 4K chip, but you’d be looking at about twice this price to get that. At the moment, unless you have a budget of £5,000, the EH-TW9400 is as good as it gets.
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https://www.whathifi.com/reviews/epson-eh-tw9400