Tinny

The object had a tinny appearance.

The shop was filled with tinny tourist geegaws.

The piano was not simply out of tune, but had become downright tinny.

You might find yourself listening to the sound your car door makes when it shuts. Is it a cheap tinny sound or a strong clunky sound like the VW?

The wails of the injured and the roars of the dead-on-the-march overwhelmed the tinny speakers in the cell, and they all watched as nearly one thousand people reduced themselves to a few frantic hundred in less than an hour, then settled into a sustained orgy of battery, rapine and rape with no end in sight but the total depopulation of the entire facility.