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...?
I'm particularly interested in getting those iDX 160s because of balanced sound and availability in my country.
Thanks