In an audio power supply the capacitors have the dual role of filtering and providing an impulse reservoir for the supply in the event of a peak in demand imposed by the music being played.

Power supply design is a broad field ... like this discussion of how to build high quality audio amplifiers for ham radio use.

But Audio Research’s new Reference 330M monoblock ... is a fully balanced pentode design with a hybrid power input and power ...

It pairs seamlessly with the Madison Streamer and Network/DAC, creating a visually cohesive and elegantly understated audio system. Inside the Madison Amplifier lies high-density circuitry, a robust ...