Problems that caused poor sound quality in early films

Old movies (pre-1950) were made using optical sound recording, which had very little dynamic range.

The acoustics of the early films was greatly poor because of the inherent archaic sound devices available to them during this period. However, the energy put into the productions of this period was also part of the adverse effects on the sound productions.

Explanation: In a nutshell, it is obvious that many of the devices available for sound productions at this time was purely analog which has little or no points of editing.