[Powell]

"James Harris" wrote

My speakers have four spikes beneath them which makes it a pain to
move the speakers even slightly as the length of at least one spike
has to be adjusted to make all four rest on/in the floor. (The floor
is solid - maybe concrete - and not wood.)

"concrete"... is a very good vibration sink compared to
wood, for example.

If this is a carpet and pad installation over concrete it is
unlikely that spikes will work anyway, IME.


Anyone heard of a kit to convert four spikes to three?

Some speaker manufactures use only three spikes. Two
in the front and one in the back. This makes adjusting
tweeter face rake adjustments much easier too.


It would have to fit beneath the existing arrangement as I don't
want to modify the speakers (which are Dynaudio Audience
62 floorstanders).

Spike sources, check out:
http://www.madisound.com/catalog/ind...?cPath=404_121
http://www.musicdirect.com/category/49


Quality casters make a good alternative (measured
reduction in cabinet vibration) to speaker spikes, IME.
They also give you the ability to move the speakers
about freely.


I'm thinking of something like a heavy duty plate with four solid
fittings above and three below. I suppose an alteration to the sound
is inevitable but would avoid scrap the idea if it has too much
effect.


An alternative is to put paving slabs on top of the carpet beneath the
speakers. They should be heavy enough to not move and also present a
more uniform surface for the speakers though even that would not be
perfect. The slight problem here is the slabs sold by the local stores
are fairly lightweight.

This is the least desirable of the alternatives you've site so far.

Oct, 2000 , TAS - What's Wrong With Speakers
by R.E. Greene

"But as soon as a speaker gets an input signal, it
starts doing things it shouldn't and starts making
noise, not just the music it should be making. Cones
and surrounds flexing, mechanical structures
vibrating, cabinets flexing in unpredicted and
unpredictable ways, air flowing turbulently,
electrostatic diaphragms vibrating chaotically
on the scale of small areas even if they are moving
regularly on a large scale, such sources of noise
are everywhere."

"How much noise are we talking about here?
A lot, a whole lot by the standards of noise
levels in electronics and recording systems.
Speaker noise appears only 20 to 30 dB down
from signal in some cases, and even the
cleanest speakers I know do not get the noise
down much more than 55 dB or so."