YOU SAID:

This room has the worst acoustics because everything is hard.

INTO JAPANESE

この部屋はすべてが難しいため、最悪の音響があります。

BACK INTO ENGLISH

Everything in this room is difficult, so there is the worst acoustics.

INTO JAPANESE

この部屋のすべてが難しいので、最悪の音響があります。

BACK INTO ENGLISH

Everything in this room is difficult, so there is the worst acoustics.