Complex sentence: These may occur if the speaker driven to high levels, or to if the speaker coils in the internal unit progressively overheat, but the distortions may be attenuated by absorbent material inside the cabinet.
Split into simpler sentences: These may occur if the speaker driven to high levels, or if the speaker coils in the internal unit progressively overheat. These distortions may be attenuated by absorbent material inside the cabinet.