We used a long long drill bit to drill through the floor boards. This hole lead to the basement area which is open ceiling. Neat. Except that most holes ended in a very tight area.
We had to use a wide drill bit (1/2 to 1 inch) just to open up the holes enough for cables to pass.
RCA cable was the worst as it had the plug. I didnt want to cut it. The speaker wires were easier, as I could fold them and pull them.
We did have the cables and wire puller get stuck at times. Hole wasn't big enough, or the puller's hook was tangled. Might want to try push it back and undo the pull, try one cable at a time, or widen the holes a bit.
Took a friend an I 6 hours with lunch break to do just the pulls. I took care of finishing up after he left.