Kef T27 and T27A - whats the differrence ?.
John Settle
anyway ) to the Kef T27A as used in the LS3/5a or any of the Kef speakers of
yesteryear. The model No. is 6535. Has anyone any idea regarding how they
differ from the T27A eg frequency response, power handling, dispersion
properties etc. They were originally (and are still) drive components of the
Cambridge R40 Speakers I have in my possession. The faceplate is entirely
different to the T27A and there is a plastic magnet cover to which the
terminals are attached.
Any assistance gratefully accepted.
Regards
John
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Kalman Rubinson
<set...@lineone.net> wrote:
>I have a pair of Kef T27's which are very different tweeters ( to look at
>anyway ) to the Kef T27A as used in the LS3/5a or any of the Kef speakers of
>yesteryear. The model No. is 6535. Has anyone any idea regarding how they
>differ from the T27A eg frequency response, power handling, dispersion
>properties etc. They were originally (and are still) drive components of the
>Cambridge R40 Speakers I have in my possession. The faceplate is entirely
>different to the T27A and there is a plastic magnet cover to which the
>terminals are attached.
I do not have the relative specs (they are buried in my office) but
the resonant frequency and recommended HP frequency are much higher
for the T27A.
Kal
David Holgate
in my KEF 104s (from the 1970s).
I now notice that the new tweeter has a much higher frequency output
than the original in the other speaker. With my current SS
amplification, this sounds less pleasant. Any ideas how I might go
about matching them (resistor in series with new tweeter?), or should I
attempt to switch the dome section from the new speaker to the
original--it seems to be just stuck on.
David
The message <j2a05v8hj86iu43kv...@4ax.com>
from Kalman Rubinson <k...@nyu.edu> contains these words:
Ross Matheson
: Further to this discussion. I recently had to replace one of the T27As
: in my KEF 104s (from the 1970s).
:
: I now notice that the new tweeter has a much higher frequency output
: than the original in the other speaker. With my current SS
: amplification, this sounds less pleasant. Any ideas how I might go
: about matching them (resistor in series with new tweeter?), or should I
: attempt to switch the dome section from the new speaker to the
: original--it seems to be just stuck on.
:
: David
I've only seen this post in this thread so far (sigh: usenet) but ...
My ears are perking up here because a while ago one of the T27's in my
Kef 104ab's blew (and I am still waiting to get a replacement
dome/coil) and shortly after I acquired a pair of triangle fold 70's
TL speakers with B139's, B110's (SP1003) and T27 variants I hadn't
seen before. I decided to strip the TL's for a later rebuild and put
the "odd" T27 pair in the 104ab's. These have a contiguous faceplate
with just a small curved recess into the dome area, quite unlike the
originals with exposed wires leading to the dome, etc. I can't
remember the back now (and it being late, I may not have described the
faceplate well) and they are still in them so I can't look, but it
seems they may be what is described. I noticed a slight difference in
sound, but as the Kefs are currently in the kitchen/dining room on a
high shelf in uncritical listening duty (ie the bottom of the speaker
box is ~ 15" above my head so I am way off axis anywhere in the room)
(they were hauled out of the bedroom to replace a loan of a friends
JBL100's and sounded much "lesser" by comparison but I had to have
sound in the kitchen again after that!) I have not really noticed
excess treble. Still, I'd really like to know more about the tweeters,
as eventually they will come out again when I get the original fixed.
There's another story about B110 variants which I should save for a
later post ... SP1003 vs SP 1057 ... the latter of which I have a
brand new pair in a KEF service item box, waiting to go into a local
almost-clone of an LS/35A ... $wapped for the SPxxxx? dud pair.
The TL B110's were SP1003's, and I just hope the SP1057's suit the
small boxes (which has unknown tweeters, definitely not Kef T27s)
Looking at the specs for each I found somewhere I liked the 1057's.
: The message <j2a05v8hj86iu43kv...@4ax.com>
: from Kalman Rubinson <k...@nyu.edu> contains these words:
:
: > On Sun, 16 Feb 2003 23:34:16 -0000, "John Settle"
: > <set...@lineone.net> wrote:
:
: > >I have a pair of Kef T27's which are very different tweeters ( to look at
: > >anyway ) to the Kef T27A as used in the LS3/5a or any of the Kef
: > >speakers of
: > >yesteryear. The model No. is 6535. Has anyone any idea regarding how they
: > >differ from the T27A eg frequency response, power handling, dispersion
: > >properties etc. They were originally (and are still) drive components
: > >of the
: > >Cambridge R40 Speakers I have in my possession. The faceplate is entirely
: > >different to the T27A and there is a plastic magnet cover to which the
: > >terminals are attached.
:
: > I do not have the relative specs (they are buried in my office) but
: > the resonant frequency and recommended HP frequency are much higher
: > for the T27A.
:
: > Kal
I'd be really interested too if/when you can unearth them, please!
Regards, Ross.
Kalman Rubinson
wrote:
>These have a contiguous faceplate
>with just a small curved recess into the dome area,
These are the original T27.
> quite unlike the
>originals with exposed wires leading to the dome, etc.
These are the newer T27, perhaps known as T27A.
I doubt if anyone can "switch" domes as the physical construction is
quite different.
>There's another story about B110 variants which I should save for a
>later post ... SP1003 vs SP 1057 ... the latter of which I have a
>brand new pair in a KEF service item box, waiting to go into a local
>almost-clone of an LS/35A ... $wapped for the SPxxxx? dud pair.
>The TL B110's were SP1003's, and I just hope the SP1057's suit the
>small boxes (which has unknown tweeters, definitely not Kef T27s)
>Looking at the specs for each I found somewhere I liked the 1057's.
There are several other variants of the B110.
Kal
Kim Bowers
I'm confused !
I have a pair of T27(A?)s that I have owned since the mid 70's.
They appear to be identical to a boxed pair of "Constructor Series" T27As
(SP1032) that I have as spares.
So I assume that I have T27As all round.
Looking at this link http://home.freeuk.com/pwhatton/lsinside.html#The I
see the same units that I have described as T27s.
Are you able to claify the difference? Either with photos, links or
descriptions please.
Regards,
Kim
Kalman Rubinson
AFAIK, there are no T27As at all. The original T27 (6535) had an
entirely different appearance and performance spec. The newer T27
(SP1032) is what is shown. I do not know of others but I had assumed
that SP1032 was what was referred to as T27A.
Kal
Kim Bowers
"Kalman Rubinson" <k...@nyu.edu> wrote in message
news:g6s95v894frjgedq1...@4ax.com...
Thanks Kal,
The spare units I have are in Kef boxes marked "Kef Constructor Series Dome
HF Radiator T27A Type SP1032" and they look like the units in the above
link.
So it seems that SP1032 = T27A.
I'm searching for a picture of T27 6535's to see the difference.
Regards,
Kim.
Kalman Rubinson
<kim.b...@nospam.com> wrote:
>I'm searching for a picture of T27 6535's to see the difference.
I can scan and send pix once my office renovations are complete if you
have not got them by then. Gimme 2-3 weeks.
Kal