What is the primary function of a bridged amplifier mode?

The primary function of a bridged amplifier mode is to convert a two-channel amplifier into a single-channel amplifier that can produce more power to drive a load, typically in situations where a higher output voltage is needed. In bridged mode, the two sides of the amplifier are utilized in such a way that they work against each other, effectively doubling the voltage output, which allows greater current to flow through the load. This is particularly beneficial in audio applications where higher power is necessary for driving low-impedance speakers.

In contrast, enhancing stereo separation pertains to maintaining distinct left and right audio channels, which is not the goal of bridging. Increasing impedance matching refers to optimizing the connection between components to ensure efficient power transfer, while improving total harmonic distortion relates to sound quality rather than increasing power output. Hence, the correct answer highlights the functional aspect of bridging an amplifier for enhanced power capabilities.