Naim’s original Nait XS was introduced in 2008. It was designed as a step up from the basic Nait integrated amp and offered improved sound and greater grunt from a similarly slimline package.

A decade on it has been revised for a second time by Naim’s engineers, and the result is the XS 3 we have on test here. Looks familiar doesn’t it? That revision turns out to be light, with the previously line-level amplifier gaining a moving-magnet phono stage and undergoing a tweak in the power amp circuitry to improve its responsiveness.
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https://www.whathifi.com/reviews/naim-nait-xs-3