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T27 wiring colours

 
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larnerp
Junior Contributor 10+


Joined: 16 Jan 2005
Posts: 12
Location: Hampshire, UK

PostPosted: Sun Jan 16, 2005 10:00 pm    Post subject: T27 wiring colours Reply with quote

Here's an interesting one ...

The T27s in my father's 104aB's have a black wire and a blue wire on the front. He has owned the speakers from new, so I know these are original units. My 104s have one T27 with a black wire and a blue wire and one T27 with two black wires. I know one is not original (but I can't remember which one I replaced!)

Can anyone confirm whether after-market replacement T27s were made with two black wires, whereas the originals were one black wire and one blue wire? (Now, that will get you lifting the fronts off your speakers to take a look! Laughing )

There is a very serious reason for asking though ... I have seen a pair of 104 aB's for sale and these are said to have "original drivers", yet from the photo, one T27 has a pair of black wires and the other T27 has a black wire and a blue wire. So, either (a) one is not original, or (b) they are not a pair...

Any thoughts?

Paul...
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terry
Senior Contributor 200+


Joined: 22 Apr 2003
Posts: 262
Location: UK

PostPosted: Mon Jan 17, 2005 6:15 pm    Post subject: Reply with quote

You can probably see a couple of dozen photos of different T27s on this site. I have had a quick look and all appear to be blue/black.
Terry
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ColinR
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Joined: 31 Jul 2004
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Location: Staffordshire

PostPosted: Mon Jan 17, 2005 7:28 pm    Post subject: Reply with quote

Most T27's will have black and blue leads.
From 1980(?), the Constructor Series and later "computer matched" versions found in Ref 101's have black leads, one turning blue 5mm behind the faceplate.
Most KEF redomes (>1980) have black wires, however one of my brood (1979) has very dark brown and blue leads - any other offers?
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Gary
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Joined: 07 Nov 2004
Posts: 275
Location: Toronto, Canada

PostPosted: Mon Jan 17, 2005 9:42 pm    Post subject: Reply with quote

I've only seen black and blue leads. Any other colour vatiations may not have made it to Canada.

The blue wire is the + wire, right?
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m_paul
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Joined: 05 Aug 2006
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PostPosted: Sat Aug 05, 2006 2:20 pm    Post subject: Reply with quote

Gary wrote:
The blue wire is the + wire, right?


I'd be grateful if someone could confirm this...?
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ColinR
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PostPosted: Sat Aug 05, 2006 2:36 pm    Post subject: Reply with quote

Blue + positive

Black - negative
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