Thanks for being with Samsung and sharing your concern. We would like to inform you that Samsung S7 edge device has Exynos version with Lucky CS47L91 Sound DAC. Be sure to hit ♡ when you find an answer that works for you.
I'm using the audio technica m20x. it's 38 ohms. It's easily driving it. But don't use headphones like Sennheiser HD 180 over ear, the volume is not enough.