While we're all praising/damning old KEF drivers, does anyone remember
the T15?
Any opinions? It's a large dome tweeter crossed over at 1kHz.


--
Eiron.

"Eiron" wrote in message
...
While we're all praising/damning old KEF drivers, does anyone
remember the T15?
Any opinions? It's a large dome tweeter crossed over at 1kHz.



My memory of it was in the transmission line speakers designed by Dr
Arthur Bailey of Bradford University and the subject of an article in
Wireless World in 1972.

A colleague of mine built a pair and he sold them to me when he got
married and moved into a smaller house in about 1977. The T15 by then
was obsolete and a T27 was used to which I later added a Coles 4001
super tweeter. By today's standards the imaging was not so good but
you could rattle windows at ten paces with the clear, solid, and
immensely natural deep bass - you have never heard organ pedal reeds
like it!

Sadly I had to disassemble them about 20 years ago as Management was
getting fed up with the size, but I still have the drivers.

The nearest commercial equivalent was the TLS80, and in a different
case a Cambridge speaker, ISTR the R50.



--
Woody

harrogate3 at ntlworld dot com

On 17/12/2015 07:35, Woody wrote:
"Eiron" wrote in message
...
While we're all praising/damning old KEF drivers, does anyone
remember the T15?
Any opinions? It's a large dome tweeter crossed over at 1kHz.



My memory of it was in the transmission line speakers designed by Dr
Arthur Bailey of Bradford University and the subject of an article in
Wireless World in 1972.

A colleague of mine built a pair and he sold them to me when he got
married and moved into a smaller house in about 1977. The T15 by then
was obsolete and a T27 was used to which I later added a Coles 4001
super tweeter. By today's standards the imaging was not so good but
you could rattle windows at ten paces with the clear, solid, and
immensely natural deep bass - you have never heard organ pedal reeds
like it!

Sadly I had to disassemble them about 20 years ago as Management was
getting fed up with the size, but I still have the drivers.

The nearest commercial equivalent was the TLS80, and in a different
case a Cambridge speaker, ISTR the R50.

All very well but what about the T15?
I acquired a pair of KEF Cantata G4s and can't live with them,
even in the garage, so they'll be on ebay after Christmas.
Unless I decide to give them another chance and re-use them with an
active crossover, as they look very nice with the mirrored domes.

We've all built transmission lines with Cambridge R50 crossovers.
It was a rite of passage....

--
Eiron.

In article ,
Eiron wrote:
All very well but what about the T15?
I acquired a pair of KEF Cantata G4s and can't live with them,
even in the garage, so they'll be on ebay after Christmas.
Unless I decide to give them another chance and re-use them with an
active crossover, as they look very nice with the mirrored domes.

IMHO, a crossover frequency right slap bang in the middle of the most
sensitive part of the hearing is asking for trouble. As is expecting one
unit to handle the top 4 or 5 octaves. Or the bottom 4 or 5, come to that.
;-)

--
*One tequila, two tequila, three tequila, floor.

Dave Plowman London SW
To e-mail, change noise into sound.

On Thu, 17 Dec 2015 14:59:11 +0000 (GMT), "Dave Plowman (News)"
wrote:

In article ,
Eiron wrote:
All very well but what about the T15?
I acquired a pair of KEF Cantata G4s and can't live with them,
even in the garage, so they'll be on ebay after Christmas.
Unless I decide to give them another chance and re-use them with an
active crossover, as they look very nice with the mirrored domes.

IMHO, a crossover frequency right slap bang in the middle of the most
sensitive part of the hearing is asking for trouble. As is expecting one
unit to handle the top 4 or 5 octaves. Or the bottom 4 or 5, come to that.
;-)

You've just reminded me of poor old Keith. He was a great fan of
full-range drivers.

d

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https://www.avast.com/antivirus

In article ,
Don Pearce wrote:
IMHO, a crossover frequency right slap bang in the middle of the most
sensitive part of the hearing is asking for trouble. As is expecting
one unit to handle the top 4 or 5 octaves. Or the bottom 4 or 5, come
to that. ;-)

You've just reminded me of poor old Keith. He was a great fan of
full-range drivers.

Ah - yes. Remember that well. As you get older tweeters get less
important. ;-)

--
*Why do overlook and oversee mean opposite things?

Dave Plowman London SW
To e-mail, change noise into sound.

On 17/12/2015 15:12, Don Pearce wrote:
On Thu, 17 Dec 2015 14:59:11 +0000 (GMT), "Dave Plowman (News)"
wrote:

In article ,
Eiron wrote:
All very well but what about the T15?
I acquired a pair of KEF Cantata G4s and can't live with them,
even in the garage, so they'll be on ebay after Christmas.
Unless I decide to give them another chance and re-use them with an
active crossover, as they look very nice with the mirrored domes.

IMHO, a crossover frequency right slap bang in the middle of the most
sensitive part of the hearing is asking for trouble. As is expecting one
unit to handle the top 4 or 5 octaves. Or the bottom 4 or 5, come to that.
;-)

You've just reminded me of poor old Keith. He was a great fan of
full-range drivers.

I was reminded of him this week when I saw in a second-hand shop a pair
of large, nicely home-made, cabinets, each containing a 4" full-range
driver with whizzer cone. Remember this Christmas to drink a toast
to absent friends. "Valves and vinyl, because I say so."
And smoke a Voigt pipe in his memory....

--
Eiron.

On 18/12/2015 2:12 AM, Don Pearce wrote:
On Thu, 17 Dec 2015 14:59:11 +0000 (GMT), "Dave Plowman (News)"
wrote:

In article ,
Eiron wrote:
All very well but what about the T15?
I acquired a pair of KEF Cantata G4s and can't live with them,
even in the garage, so they'll be on ebay after Christmas.
Unless I decide to give them another chance and re-use them with an
active crossover, as they look very nice with the mirrored domes.

IMHO, a crossover frequency right slap bang in the middle of the most
sensitive part of the hearing is asking for trouble. As is expecting one
unit to handle the top 4 or 5 octaves. Or the bottom 4 or 5, come to that.
;-)

You've just reminded me of poor old Keith. He was a great fan of
full-range drivers.


**There's no such thing as a "full range driver", despite the clowns who
imagine a single driver can actually cover 20Hz ~ 20kHz with anything
approaching fidelity. I guess if the limits are +/-20dB.....

Don't get me started with SETs and single driver adherents.

--
Trevor Wilson
www.rageaudio.com.au

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Are kent Engineering Foundary still in business?
Brian

--
From the Sofa of Brian Gaff Reply address is active
Remember, if you don't like where I post
or what I say, you don't have to
read my posts! :-)
"Eiron" wrote in message
...
While we're all praising/damning old KEF drivers, does anyone remember the
T15?
Any opinions? It's a large dome tweeter crossed over at 1kHz.


--
Eiron.