I'm very aware that some companies market "high current" power supplies for line level components, and some pre/pros have "arc-welder" power supplies, which of course weigh more. However, this is really overkill. In a component that supplies a low level signal that is mainly a voltage rather than a current, there is absolutely no need, nor sonic advantage in having a power supply that can supply more current than is needed to operate the circuitry (with reasonable voltage over-capacity to take into account low voltage AC situations).

Line level equipment like a pre/pro does not supply a significant current to the load. Simple Ohm's law calculations can tell you the amount of current and voltage that is needed for a particular signal drive. Having a power supply that can supply orders of magnitude more current that the circuitry can use may make you feel good that you have a "high quality" component, but this "feature" has absolutely no bearing on how the component sounds. All that excess current capacity goes unused simply because the circuitry doesn't require it (ohm's law).

A power amplifier is a different story, since as it's name implies, it delivers power, which is a function of voltage and significant current delivery.


[This message has been edited by soundhound (edited April 01, 2003).]