Sendt: 25 Juli 2013 kl. 14:59 | IP-adresse registreret
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Ronin: Ikke for at gøre tråden til en diskussion af hvordan Martin Logan højtalere virker, men jeg føler jeg er nødt
til at rette, hvad du skriver. Her er den fulde tekst fra MLs hjemmeside:
"How Electrostatic Speakers Work
An electrostatic transducer has three basic components - stators, diaphragm, and spars (spacers) - assembled as
a sandwich. The diaphragm is an ultra light plastic film, impregnated with an electrically conductive material and
stretched taut between the two stators, which are perforated steel sheets coated with an insulator. When the
speaker is operating, the diaphragm is charged to a fixed positive voltage by a high-voltage power supply,
creating a strong electrostatic field around it. (If you've been puzzling over why electrostatic speakers have
power cords, there's the reason).
The stators, meanwhile, are connected to the audio system's amplifier through a step-up transformer. It converts
the amplifier's output to a pair of high-voltage signals of equal strength but opposite polarity. So as the charge
on one stator grows increasingly positive, the charge on the other grows more negative by exactly the same
amount. Because like charges repel and opposite charges attract, the diaphragm's positive charge will force it to
move forward or backward depending on the stator charges. For example, when the front stator's charge is
negative and the back stator's positive, the diaphragm will be pulled from the front and pushed from the back and
therefore move forward. The stronger the charges on the stators, the greater the diaphragm displacement. This
is how an electrostatic transducer translates an electrical audio signal into diaphragm motion to produce sound
waves in the room.
To help stiffen the panel (it's very important that only the diaphragm move) and to prevent the diaphragm from
ever coming too close to a stator, nonconductive strips called spars are placed widthwise at intervals along each
stator's length."
Opsummering:
1) Membranen er statisk opladet, men er ikke signalførende.
2) Statorerne er gitrene. Signalet går gennem dem, efter at være opkonverteret til højspænding af trafoen.
3) Spacerne (de tidligere sorte, nu gennemsigtige) tværstriber har udelukkende til formål at opretholde afstanden
mellem membran og stator
4) Panelet har forbindelser til begge statorer (signal + og - ), samt til membranen (ladning).
Håber det skaber lidt mere klarhed.
__________________ StrictlyStereo
- Bevensee
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