SpeakerTalk

si bones · Introductory Contributor Joined: 31 Aug 2015 Posts: 1

Hi guys i am looking for a single replacement woofer ( sp 1039 ? ) for my 104 ab s any ideas out there i ve tried falcon and e bay but no joy yet .....

Garethwatkins · Posted: Tue Sep 01, 2015 10:37 am Post subject:

They do come up from time to time, just be patient. SP1039 is the exact model you want.

audiolabtower · VIP Contributor 500+ Joined: 06 Jan 2009 Posts: 686

http://www.ebay.co.uk/itm/Kef-B200-SP1039-Bass-Drivers-Good-Condition-Kef-Reference-103-104-/252083022830?hash=item3ab151abee

mojofoto · Posted: Wed Sep 09, 2015 1:59 am Post subject:

where are you located, I may be able to find one.

Mike G · Junior Contributor 10+ Joined: 04 Apr 2009 Posts: 19

I am currently selling a pair just just shoot me a PM if you would like more info.

Cigfran · Introductory Contributor Joined: 08 Jan 2016 Posts: 2

If you find an SP1039 bass unit for sale look for the little white spot in the middle of the dustcap on the centre of the unit.
This indicates the improved higher temperature aluminium and nomex voice coil former, so the unit will handle higher power and be less prone to failure.

RR105-3 · Intermediate Contributor 25+ Joined: 13 Jul 2007 Posts: 29

T.O. Chef · Posted: Wed Oct 28, 2020 6:54 pm Post subject: B-200 sp1039

"If you find an SP1039 bass unit for sale look for the little white spot in the middle of the dustcap on the centre of the unit.
This indicates the improved higher temperature aluminium and nomex voice coil former, so the unit will handle higher power and be less prone to failure."

This is the first time I've heard this. Where did you get the info?

I'm sitting here now with a pair of original 104aB's SN's 54585/54582 , manufacture date unknown. No white spots on the B-200's
Also here are a pair of original 104's (Not aB's.) SN's 31329 and 31331. Older models I'm sure. But THEY sport white dotted B-200's.

Were there any electrical differences between them?
_________________
Music is food for the soul.

audiolabtower · VIP Contributor 500+ Joined: 06 Jan 2009 Posts: 686

I doubt very much there are any differences apart from heat dissipation issues, if I remember correctly, the 104 was rated as 50W, the 104aB rated at 100W. This would suggest the coil former upgrade allowed this to take place, and the T27 was then additionally protected by the addition of the crossover panel fuse.

Why your units appear to be the wrong way round, who knows? Maybe the 1039s have been swapped out at some time, or someone at the factory ran out of white paint or mislaid their brush that day? Smile

T.O. Chef · Posted: Wed Oct 28, 2020 11:11 pm Post subject:

Curiouser and Curiouser.
Since the aB's are absolutely going to be my "keeper set", I'm going to do a scan of all 4 and use the data to make a decision on swapping back and forth Very Happy

_________________
Music is food for the soul.

T.O. Chef · Posted: Fri Oct 30, 2020 1:01 am Post subject:

I would love to know more about this B-200 upgrade. It's the first I've heard of it.
Especially I'd like to know when the change was made, what version of speaker system was it designed for, and how all that ties into the 104 development.
I HAVE seen white dotted B-200 dust-cap's. But only have I seen a few 104aB's with it.
The info in this thread is quite confusing, since I know for certain the both my 104aB's and my earlier 104's are 100% original. Never have they been modified (other than some clown swapped a 4.2uF tweeter cap in the base 104's for a 4uF MALLORY cap that measured a full 4.8uF). The drivers though are untouched. It's very obvious.
_________________
Music is food for the soul.

T.O. Chef · Posted: Fri Oct 30, 2020 1:11 am Post subject:

Please pleas please tell me how I can get photo's into the text box here .... as I see in this thread.
Nothing seems to work for me in this effort.
_________________
Music is food for the soul.

audiolabtower · VIP Contributor 500+ Joined: 06 Jan 2009 Posts: 686

Upload the photo into any hosting site like google photos etc and mark it public, then copy the link. You can check the link by pasting into a blank browser and see if the picture comes up. Then in the post or reply here click the IMG box at the top and paste the link from the photo.

T.O. Chef · Posted: Mon Nov 02, 2020 1:06 pm Post subject:

Thanks for the lesson in photo sharing. It's a bit complex and time consuming to set up, but I think I've managed.
Posting photos here now of ancient 104's (in very rough cosmetic condition), and early 104aB's well cared for.
The 104's have what I'm certain to be original B-200's with white dotted dust caps. The 104aB's are Plain Jane.
Can anyone confirm that these are indeed different internally?

https://photos.google.com/album/AF1QipNVtuxhaS8tsM7oLYATGqd8J54hHx1uiNhPXDor/photo/AF1QipOASIwifRIAaKcHVMk46lwaTYFp-WFyMnOvdhGU

https://lh3.googleusercontent.com/jrhey0c7BE0xYYZs1c4xhSYbBe8OZJPDoxIZKzwb4kPt9i5AOj_iQb0S9exkCuItt-SDGps1X3ukvZsqGdUry-I60lGa2xOIQXER82tR77O_SihzbovVLyKTf3lhFJVDyA28Hbcnk5Cc8U5rfu1wtgHU-7wJXZDUbTNk2aCxlKJKWJH9tCbh3-Sp7GYYboINA-LIxx-nGF3D6t-0KIjfelqWlNczSlQqe_Nt-0A2fRJADL4HAf8FIRjgyYxtZFRd1C9gmLS8kHklRLVyKw7H35YataqL5LO8gi-cwQh9wZ3VcZ19gg6NINku0P7FwKkKevUL6iJ433sIlgPzqAZGFDShI-bI1MJzGnbdAO4WP9ncG7Mw1cEQxx0N8C6xtXTSpvaVRVGLrBImtRVej2RtF3q5RKsNKULU-revY4PeVUbUPlQhsZosFkTwLOxpGVv68ZB-krcFS7gsq7pUtr27gN3_4Gt4MCg1HSIQsBvFYXXB_QK4iJ377TZ6v-2QVIgJRhrajaz5Zu4JSuZ_GRrf_ZICDwMoj919g5XMcN8Yeil7VJkMjZWsu-pnpnPANL_O4o3UemsVuXftqnh1SrlSrY-wABwDDQQfSBk9kWjbfAKkYus2aQn_6yqogEHYKJxDpUvsPR-qgoriMmWkEds-ASni7rd1t5pUYra5jZbqpn8uIS4AsczB7B3fVGeMJA=w680-h907-no?authuser=0
_________________
Music is food for the soul.

audiolabtower · VIP Contributor 500+ Joined: 06 Jan 2009 Posts: 686

sorry, those links don't work.