Someone was asking about supertweeters recently, and this evening someone
brought over a Ying Tai mode LCY-100K supertweeter, which he had purchased
from e-speakers.com. It's some sort of tiny ribbon with a very high resonant
point, intended for crossover at 10 or 13 KC with an internal 18 dB/octave
high-pass.

I found that it made for a lot more top end on my Maggies, but since the
speaker had no low-pass network on it (and it dropped off only at 16 KC),
setting it to 13 KC still produced a high frequency bump that was audible.
So I don't know what it would do on a system designed for it.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

On 30 Dec 2004 20:32:07 -0500, (Scott Dorsey) wrote:

I found that it made for a lot more top end on my Maggies, but since the
speaker had no low-pass network on it (and it dropped off only at 16 KC),
setting it to 13 KC still produced a high frequency bump that was audible.
So I don't know what it would do on a system designed for it.

It does make ya wonder, though. A true ribbon (does this include
your Maggies?) is mass limited on the top end, and so will fall
off at only 6dB per octave above the mass limit frequency.

Len's 40 kHz is only an octave and a half or so higher than the
16 kHz (nominal). Does this mean that he could use a late-
generation Maggie for his project? Or does it just mean that
the map is not the world?

Chris Hornbeck
"They'd meet at the Tout Va Bien."
-JLG, _Bande a part_, 1964

Scott Dorsey wrote:

Someone was asking about supertweeters recently, and this evening someone
brought over a Ying Tai mode LCY-100K supertweeter, which he had purchased
from e-speakers.com. It's some sort of tiny ribbon with a very high resonant
point, intended for crossover at 10 or 13 KC with an internal 18 dB/octave
high-pass.

I found that it made for a lot more top end on my Maggies, but since the
speaker had no low-pass network on it (and it dropped off only at 16 KC),
setting it to 13 KC still produced a high frequency bump that was audible.
So I don't know what it would do on a system designed for it.

6/18 has a benign summation ... O;-)

--scott


Kind regards

Peter Larsen

--
*******************************************
* My site is at: http://www.muyiovatki.dk *
*******************************************

Chris Hornbeck wrote:
On 30 Dec 2004 20:32:07 -0500, (Scott Dorsey) wrote:

I found that it made for a lot more top end on my Maggies, but since the
speaker had no low-pass network on it (and it dropped off only at 16 KC),
setting it to 13 KC still produced a high frequency bump that was audible.
So I don't know what it would do on a system designed for it.

It does make ya wonder, though. A true ribbon (does this include
your Maggies?) is mass limited on the top end, and so will fall
off at only 6dB per octave above the mass limit frequency.

The Maggies are not true ribbons. Some of the higher end Maggies have real
ribbon tweeters, but I have the old MG-1.4 which have a magnetoplanar tweeter
that is pretty flat up to 16 KC and then drops like a rock. Because of the
magnet assembly, I am not sure you can even consider it to be a diaphragm in
free air; the resistance of the magnet assembly may cause another resonant pole
to be created somewhere.

Len's 40 kHz is only an octave and a half or so higher than the
16 kHz (nominal). Does this mean that he could use a late-
generation Maggie for his project? Or does it just mean that
the map is not the world?

Sure, most of the real ribbon drivers do go up very high. The supertweeter
I mention is really just a miniaturized ribbon driver, but even the cheap
Pioneer drivers will go up to 40 KC, and Parts Express stocks them. They
don't sound very good in the audible range, though. I think I had recommended
the Ravens earlier in the thread... the Ravens are conventional ribbons that
again go up pretty high, and actually do sound good.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Scott Dorsey wrote:
Someone was asking about supertweeters recently, and this evening someone
brought over a Ying Tai mode LCY-100K supertweeter, which he had purchased
from e-speakers.com. It's some sort of tiny ribbon with a very high resonant
point, intended for crossover at 10 or 13 KC with an internal 18 dB/octave
high-pass.

I found that it made for a lot more top end on my Maggies, but since the
speaker had no low-pass network on it (and it dropped off only at 16 KC),
setting it to 13 KC still produced a high frequency bump that was audible.
So I don't know what it would do on a system designed for it.
--scott

Wouldn't an active crossover allow answering the question?

If it's a ribbon with a "high resonance point" that sounds
like it'd be bumpy, anyway.

--
Les Cargill

Les Cargill wrote:
Scott Dorsey wrote:
Someone was asking about supertweeters recently, and this evening someone
brought over a Ying Tai mode LCY-100K supertweeter, which he had purchased
from e-speakers.com. It's some sort of tiny ribbon with a very high resonant
point, intended for crossover at 10 or 13 KC with an internal 18 dB/octave
high-pass.

I found that it made for a lot more top end on my Maggies, but since the
speaker had no low-pass network on it (and it dropped off only at 16 KC),
setting it to 13 KC still produced a high frequency bump that was audible.
So I don't know what it would do on a system designed for it.

Wouldn't an active crossover allow answering the question?

Maybe, but then I'd have some unfamiliar electronics in the signal path
as well.

If it's a ribbon with a "high resonance point" that sounds
like it'd be bumpy, anyway.

It is, but it's just one bump, and it's a really high and really wide
one. The low slope helps a lot.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."