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wrote:
Skeeter & Scott:

First, let's establish one thing: Electrostatic speakers are _not_ what
is typically taken as single-driver, full range speakers.

If not then what is??

First, by
their nature, they distribute the reproduction via the interaction
between the fixed charge on the diaphram and the variable charges on
the stators (plural).

Which has no significance other than that they are driven more or less
uniformly over their entire surface - of course they do have less
excursion and more effective stiffness at the edges where they are
suspended.

By that possibility, they need no additional
baffles in order to function,

Actually, no. They are no different in this respect than any other
diaphragm. They can function as such mostly because of the larger
surface area than an equivalent 'dynamic driver' and sometimes down to
bass frequencies because of the Q of the system. No different in this
regard than something like the dipole Carver speakers that used dynamic
drivers for bass without a baffle.

All speakers have a relationship with baffles or lack thereof. ESLs are
no different in this regard.

There are commercially made ESLs with sealed box baffles, fwiw.

and they have the capacity to have local
and general effects on the diaphram... as Sound Lab carefully explains
in their literature.

Local and general effects? Standing waves? All speakers have standing
waves and breakup modes on their surface (so far).

Sound Labs ESL speakers are made with full range drivers, just multiples
of them.

So, Lowthers they ain't (as a typical 'full-range
single driver'). I guess I should have qualified to state typical
voice-coil & magnet drivers.

Lowthers are actually NOT *full range* single drivers.
They are two way speakers with a mechanical xover to a whizzer cone.
If supplied without a whizzer cone, then they are wide range drivers -
certainly not full range - and they suffer from many if not all of the
issues found when drivers are used at frequencies whose wavelengths are
small compared to the diaphragm size...as well as many others.

snip

Peter Wieck
Wyncote, PA

_-_-bear

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