Check the buildings basement or an unfinished wall/ceiling to see if your wiring appears to run inside a pipe (conduit)or spiraled metal jacket. You may have easy access to ground using an inexpensive screw mount 3 prong to 2 prong adaptor. Using an inexpensive outlet testor and the mounted adaptor, check to see if you get two amber lights and no red light.
No ground, should I worry?
My manuals for my Theta Digital DAC and transport insist I DO NOT DEFEAT the ground pin to their equipment . However having recently rented an apartment in an old (not even breakers, fuses!) house, the electrician says there's no way to get ground without really updating the service. The whole rig is set up and has been running and sounding fine for two months. Safety aside, does anyone know how defeating the ground can or will compromise the reliability and performance of these units?