Can I use high impedance earphones without amp?

Hi I have a regular Galaxy S6 G920F and I wonder if I can use relatively high impedance earphones like Beyerdynamic iDX 160 iE (47 ohms). Generally what impedance does this phone supports without amp and what happens if I use higher impedance? Do I simply lose just volume or...?
Additionally is there any software trick like audio mods that can help (similar to overclocking CPU or raising USB charge amperage)
I'm particularly interested in getting those iDX 160s because of balanced sound and availability in my country.
Thanks