What will happen if speaker wires that are too small for the distance are used?

When speaker wires that are too small for the distance are used, the resistance in the wire can lead to a significant voltage drop, particularly at lower frequencies where the demand for current is higher. This drop can affect the loudness of the sound being produced across the frequency spectrum. Essentially, an inadequate wire gauge can restrict the amount of power that reaches the speaker, resulting in diminished performance, especially noticeable with bass frequencies. Consequently, the speaker may sound less powerful or lack clarity across the audio range, leading to a reduction in overall sound quality.