[Trevor]

On 16/02/2017 6:38 AM, PStamler wrote:
Capacitors, unfortunately, don't become low impedance at high
frequencies; since they're made of rolled-up layers of foil and
dielectric,

Not all are made like that.

they have an inductive component, and at high frequencies
this becomes the most important; real-world capacitors show an
impedance that falls with increasing frequency up to a point, then
bottoms out, and rises as the frequency increases.

Which is rarely a problem at audio frequencies though.

Trevor.