Again, many different factors influence the durability of a subwoofer unit. From the materials to the power requirements of the subwoofer, everything is important in determining how long the system will last. In several cases, it has been seen that even though the subwoofer was of very high-quality, the installation was not done properly. Thus, the unit got degraded much before its time and broke down within a few months of fixing. So, many variables influence the longevity of a subwoofer.