electrolytic capacitors

[calman]

What applications are the other types of electrolyics caps better use in. I use the general purpose for all (excluding speakers). Other types: Low leakage, low impedance.

[trevorg]

> What applications are the other types of
> electrolyics caps better use in. I use the
> general purpose for all (excluding
> speakers). Other types: Low leakage, low
> impedance.
There used all the time as filters in power supplies.

[calman]

> In a preamp(pioneer Spec-1) replacing the NP electrolytic with film or foil would there be an improvement in sound quality?