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Choke input provides better average regulation. Peak regulation - which likely has just as much impact on the music - is much worse. For this reason, choke input supplies require more storage capacitance than would otherwise be required to merely eliminate ripple. The combination of L and C can also create resonances and other undesired behavior. It's a good idea to always use SPICE to simulate the output impedance of any supply powering an audio amplifier, particularly when it uses both chokes and filter capacitors.

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