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

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

On 18/12/2015 09:37, Trevor Wilson wrote:

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

De Mortuis ...

--
Eiron.

In article , Don Pearce
scribeth thus
On Thu, 17 Dec 2015 17:46:14 +0000, Eiron
wrote:

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....

Towards the end he was obviously pretty frail, and on enough
medication to stock a chemist's shop, but he still managed to ride his
huge old motorbikes. I think maybe a lot of the time when he was
extra-cantakerous, it was the pain talking.

d

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


We are talking about the Keith that lived over at St Neots aren't we?.
--
Tony Sayer

On Fri, 18 Dec 2015 14:38:27 +0000, tony sayer
wrote:

In article , Don Pearce
scribeth thus
On Thu, 17 Dec 2015 17:46:14 +0000, Eiron
wrote:

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....

Towards the end he was obviously pretty frail, and on enough
medication to stock a chemist's shop, but he still managed to ride his
huge old motorbikes. I think maybe a lot of the time when he was
extra-cantakerous, it was the pain talking.

d

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


We are talking about the Keith that lived over at St Neots aren't we?.

That's him. Keith Garrett.

d

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

On Fri, 18 Dec 2015 14:38:27 +0000, tony sayer
wrote:

In article , Don Pearce
scribeth thus
On Thu, 17 Dec 2015 17:46:14 +0000, Eiron
wrote:

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....

Towards the end he was obviously pretty frail, and on enough
medication to stock a chemist's shop, but he still managed to ride his
huge old motorbikes. I think maybe a lot of the time when he was
extra-cantakerous, it was the pain talking.

d

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


We are talking about the Keith that lived over at St Neots aren't we?.

That's him, Keith Garrett

d

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

Trevor Wilson wrote:



**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.....


** The nearest thing ever made has to be the middle section of a Quad ESL63 or any of its more recent offspring.

A single plastic diaphragm, driven as a series of concentric rings via a delay line produces near perfect sound to beyond 20kHz - to a listener on axis of course. Even produces accurate looking square waves at mid frequencies.



..... Phil

In article , Don Pearce
scribeth thus
On Fri, 18 Dec 2015 14:38:27 +0000, tony sayer
wrote:

In article , Don Pearce
scribeth thus
On Thu, 17 Dec 2015 17:46:14 +0000, Eiron
wrote:

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....

Towards the end he was obviously pretty frail, and on enough
medication to stock a chemist's shop, but he still managed to ride his
huge old motorbikes. I think maybe a lot of the time when he was
extra-cantakerous, it was the pain talking.

d

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


We are talking about the Keith that lived over at St Neots aren't we?.

That's him. Keith Garrett.


Yes of course, went to that bungalow of his and the gear stuffed in a
small "ish" room had to be seen to be believed!. Still he knew what
sounds he liked!...


d

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


--
Tony Sayer

In article , Phil
Allison scribeth thus
Trevor Wilson wrote:



**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.....


** The nearest thing ever made has to be the middle section of a Quad ESL63 or
any of its more recent offspring.

A single plastic diaphragm, driven as a series of concentric rings via a delay
line produces near perfect sound to beyond 20kHz - to a listener on axis of
course. Even produces accurate looking square waves at mid frequencies.



Don't they just! saw just that at the QUAD factory many years ago when
mine were being upgraded, a very square square wave indeed;!

Makes me wonder how any other speakers could do that as well?.

.... Phil

--
Tony Sayer