Simple Explanation

Combining two amplifier channels to make one more powerful channel.

Concise Technical Definition

A configuration in which two amplifier channels are used in anti-phase to drive both sides of a load (e.g., a speaker), effectively doubling the output voltage and quadrupling the power output into that load.

Layman-Friendly Analogy

Like using two people to push and pull a swing at the same time—more force, more motion.

Industry Usage Summary

Used in audio amplifiers, especially in car audio and professional sound systems, to increase output power without needing higher-voltage power supplies. Also useful when only one powerful channel is needed instead of two lower-powered stereo channels.

Engineering Shortcut

Bridging = 2 amps → 1 stronger channel (4× power, same load).

Full Technical Explanation

Bridging (or BTL: Bridge-Tied Load) refers to using two amplifier channels in a push-pull configuration, where the speaker is connected between the two outputs of the amplifiers. One amplifier outputs a signal while the other outputs an inverted version. This effectively doubles the voltage swing across the load, which increases power output by a factor of four (since Power ∝ Voltage²). It's commonly used for increased power delivery into low-impedance loads.