Dumb ass! - "Margaret von Busenhalter-Butt"

This is the first post I've seen that is 3.7 times shorter than the poster's
name.

=== Andy Evans ===
Visit our Website:- http://www.artsandmedia.com
Audio, music and health pages and interesting links.

"William Sommerwerck" wrote in message
...
Orthodynamic speakers -- ie, a conductor on a flat plastic substrate.

What!???

They're fairly common. Several companies sell them, including one in
Seattle.

Basically, they're ribbons backed with Kapton, Mylar, etc. (A true ribbon
is a
pure metal strip, with no backing.) The backing eliminates the ribbon's
fragility and adds mass that lowers the driver's fundamental resonance.

The classic Infinity EMIT and EMIM drivers are orthodynamic. The drivers
in
Apogee speakers are orthodynamic, not ribbon (except for the tweeter used
in the
Diva and one or two others). There have been orthodynamic headphones, such
as
the Yamaha YP-1 [sic] of a few years back.

Orthodynamic drivers have much of the "speed" and low coloration of
electrostatics. Having owned Acoustat Sixes and Apogee Divas, I actually
find
the latter to be (subjectively) more accurate -- and the Sixes were hardly
chopped liver.


Hi William,

Do you still have the Divas? If not, I'm curious to know what speaker
bettered them...

Cheers,

Margaret

Bob Cain wrote:


Ah, I was searching on them as a phrase rather than as either word
appearing independantly. Looked at all 37 and the word seems to be used
a fair bit but not defined often. Two sources indicated that
orthodynamic and isodynamic are a distinction based on how the force is
applied. They both say that orthodynamic is when it is applied to a
single point (or ring) and would encompass cone and dome speakers. They
say that isodynamic drivers are those that have their whole surface
driven and would encompass, electrostatics, magnaplaner and ribbons.

The audiophile use is vice versa with orthodynamic meaning surface driven.

Too, the dictionary defines "isodynamic" as meaning "equal
force" which would seem to imply a fully driven surface.

Orthodynamic isn't a dictionary type of word.


Bob
--

"Things should be described as simply as possible, but no
simpler."

A. Einstein

Robert Morein wrote:
"Dave Plowman (News)" wrote in message
...

In article ,
Robert Morein wrote:

Electrostats may not be completely time coherent, but as they have a
single driver,

But they don't.


Some do, some don't.
My Acoustat 2+2's have a single driver.

Err... no they don't. They have 4 panels per speaker. 2 on top of 2
(2+2). I had the 1+1's medallion mod for close to 20 years. Loved the
way they sounded and the sound stage they presented. Just recently sold
them. They were replaced with Von Schweikert V4's.

On Sat, 06 Nov 2004 13:06:49 -0800, Bob Cain
wrote:

Two sources indicated that orthodynamic and isodynamic are
a distinction based on how the force is applied. They both
say that orthodynamic is when it is applied to a single
point (or ring) and would encompass cone and dome speakers.
They say that isodynamic drivers are those that have their
whole surface driven and would encompass, electrostatics,
magnaplaner and ribbons.

The audiophile use is vice versa with orthodynamic meaning
surface driven.

Aside from the Wharfedale Isodynamic headphones, which were correctly
described.
--

Stewart Pinkerton | Music is Art - Audio is Engineering

On Sun, 7 Nov 2004 09:37:00 +1100, "Phil Allison"
wrote:


"Stewart Pinkerton"
tony sayer



Yes that is very impressive How many moving coil designs could do
that....

All Dunlavys, for a start.


** Mr Sayer did a very bad thing - he snipped the second half of my post
re the ESL 63 factory test prior to adding his remark.

Then that Pinkerton ****wit replied, half cocked, to the sniped post -
which is typical for someone with half a brain.

So, you *are* going to be as big a **** here as you are on RAT.....
--

Stewart Pinkerton | Music is Art - Audio is Engineering

On Sat, 06 Nov 2004 22:54:28 +0000, Eiron wrote:

Ian Molton wrote:

Eiron wrote:

We haven't had a good argument about current dumping for a long time.
Peter Walker's maths stinks. The 405 is just a non-linear amp
with lots of negative feedback and no adjustments to be made.

I happen to find my 405 to work rather well. can you expound on your
claim a bit? where is his math faulty?

I didn't say the 405 doesn't work.

The article from Wireless World, Dec 1975 by P.J. Walker is at
http://www.quadesl.org/Family_Album/...elessW1975.doc

When you understand fig. 1. you may be qualified to discuss the subject.

What is there to discuss? It works as claimed, the only bar to
perfection being a theoretical requirement for a zero impedance at one
point in the circuit.
--

Stewart Pinkerton | Music is Art - Audio is Engineering

In message , Stewart
Pinkerton writes
On Sat, 06 Nov 2004 22:54:28 +0000, Eiron wrote:

Ian Molton wrote:

Eiron wrote:

We haven't had a good argument about current dumping for a long time.
Peter Walker's maths stinks. The 405 is just a non-linear amp
with lots of negative feedback and no adjustments to be made.

I happen to find my 405 to work rather well. can you expound on your
claim a bit? where is his math faulty?

I didn't say the 405 doesn't work.

The article from Wireless World, Dec 1975 by P.J. Walker is at
http://www.quadesl.org/Family_Album/...elessW1975.doc

When you understand fig. 1. you may be qualified to discuss the subject.

What is there to discuss? It works as claimed, the only bar to
perfection being a theoretical requirement for a zero impedance at one
point in the circuit.

Also that to keep the bridge balanced, the class-A (correction)
amplifier must never get into slew-rate limiting. Hence the use of a
low-pass filter on the input to the amp.


--
Chris Morriss

"Stewart Pinkerton"
"Phil Allison"


Then that Pinkerton ****wit replied, half cocked, to the sniped post -
which is typical for someone with half a brain.

So, you *are* going to be as big a **** here as you are on RAT.....


** Yep - as before, I will fearlessly expose excremental pommy ****s
like Pinkerton to the condemnation of all decent persons as he so richly
deserves.



Stewart Pinkerton | Masturbation is his game - Audio is is crippled
victim.





............ Phil

"Phil Allison" wrote


** Yep - as before, I will fearlessly expose excremental pommy ****s
like Pinkerton to the condemnation of all decent persons as he so richly
deserves.


Hmmm.... does one detect the merest hint of racism here?

Is phil still annoyed that his forebears were transported by the evil
pommies to the colonies for (presumably) incest or sheep-shagging?

Dave H.
(The engineer formerly known as Homeless)