What does the term “bridge” refer to in the context of audio amplifiers?

In the context of audio amplifiers, the term “bridge” specifically refers to a method of connecting two amplifier channels to increase the power output to a speaker. This technique involves combining the output of two channels to drive a single speaker, effectively doubling the voltage delivered to the speaker and thus providing more power. In a bridged configuration, one channel outputs a positive signal, while the other outputs a negative signal, causing the speaker to experience a higher voltage, which translates to increased power.

This method is particularly useful for driving low-impedance speakers that require more power than a single channel can provide on its own. The result is not just an increase in power output but also enhances the performance of the audio system, allowing for better sound levels and dynamics without significantly increasing distortion.

This bridged approach differs from simply connecting two amplifiers or utilizing equalizer settings, as it specifically focuses on power amplification capabilities through channel bonding. Such a configuration is commonly found in professional audio environments where high volume and clarity are required from performance equipment.