[Powell]

"Don Pearce" wrote

Sharp spikes are often put on the bottom of speakers to keep
them from moving when a loud bass note is hit.

The purpose of the spikes is to allow the speaker to stand
on carpet without wrecking it.

Perpetuating USEnet myth, I see, go do your own
homework.

For maximum effectiveness spikes should not be run
through any type of carpet interface (carpet/foam).
If you have high quality carpet, spikes just won't
penetrate the carpet/pad substrate. The tightly
woven jute backing and under pad are the problem.
The conical shape of spikes simply will not couple
to the sub-floor... and I mean tightly. While it might
appear (feel) to you that your spikes are firmly in
they are still supported by the carper/pad. Sound
pressure measurements and auditioning indicate
only a poor improvement in fidelity if used in this way.