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proffski
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Location: Tewkesbury UK
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 Posted: Fri Feb 25, 2011 12:42 pm Post subject: |
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| Richie wrote: | | Mine are just screws, maybe I should fit bolts, would this be a captivated nut ? |
I have never seen KEF using just woodscrews on larger drive units, tweeters yes but certainly not on B200 and ABR on the 104 unless it is a kit of course, but even then the correct T-Nuts were provided. 
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Richie
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| Posted: Fri Feb 25, 2011 1:39 pm Post subject: |
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Thanks, something like Araldite will do ?
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Richie
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| Posted: Fri Feb 25, 2011 1:41 pm Post subject: |
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| proffski wrote: | | Richie wrote: | | Mine are just screws, maybe I should fit bolts, would this be a captivated nut ? |
I have never seen KEF using just woodscrews on larger drive units, tweeters yes but certainly not on B200 and ABR on the 104 unless it is a kit of course, but even then the correct T-Nuts were provided. |
Thats odd, I have 2 pairs and they alll have just screws on all the drivers.....
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proffski
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| Posted: Fri Feb 25, 2011 1:43 pm Post subject: |
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| Richie wrote: | | Thanks, something like Araldite will do ? |
Yes, when building my TLs/Labyrynths the nuts were sharpened and cleaned with fine emery & meths prior to being hammetred into the baffle.
Then they were glued in with Araldite and a hair dryer was used to get the adhesive to flow nicely... worked like a dream! 
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man standing in a bucket and trying to lift himself up by the handle.
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Richie
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Location: Northamptonshire
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| Posted: Fri Feb 25, 2011 1:49 pm Post subject: |
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Sorry, I standed corrected, the white ones do indeed have bolts but the other wood veneer ones are screws, maybe they are a kit as you say.
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Richie
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| Posted: Fri Feb 25, 2011 1:51 pm Post subject: |
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standed = stand lol
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audiolabtower
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| Posted: Fri Feb 25, 2011 2:28 pm Post subject: |
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| the other strange thing is your flat suspension is a SP1054 as described in previous post? but the 104 and aB used SP1039 which was a special low distortion short coil, long gap B200, and the 1054 was only used in the Calinda? |
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Richie
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| Posted: Fri Feb 25, 2011 8:13 pm Post subject: |
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Bit confused here, I think Jon's 104 is a kit, the front baffle looks different...
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proffski
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| Posted: Fri Feb 25, 2011 8:15 pm Post subject: |
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| Richie wrote: | | Bit confused here, I think Jon's 104 is a kit, the front baffle looks different... |
Yes, I too noticed the chamfered edges, but to use woodscrews... 
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man standing in a bucket and trying to lift himself up by the handle.
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T.O. Chef
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Joined: 31 Aug 2007
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Location: Toronto Canada
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| Posted: Fri Feb 25, 2011 8:45 pm Post subject: |
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I thought when I saw Jon's that that the cab's were originally KEF factory made, but he'd constructed new baffles that jut outwards.
I was wondering how much internal volume it had added, how they were attached, and what if anything were used as grills.
And wouldn't that narrower baffle change the t-27 response characteristics?
Can you elaborate Jon?
Proff, I too have seen a lot of 104aB's but neer' a one with screws holding the B-200 / BD-139. Only T-nuts.
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Nimo_jon
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Joined: 21 Feb 2011
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Location: Singapore
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| Posted: Sun Feb 27, 2011 2:31 am Post subject: |
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On my both pairs of 104, the T27A are held onto the baffle recess by 3 tapping wood screws. The baffle is chip board and if too much torque is added, it would lost its grip. On one of the 104, I had to use epoxy and woodfiller to reconstruct part of the recess. I am going to use blots and nuts with washers at the back to hold the T27.
The B200 and SP1024 SBR are both held onto the baffle by 4 screws and T nuts. Using too much torque will twist the back nut anchor and destroy the back of the baffle. Madisound sells the parts.
https://www.madisound.com/store/index.php?cPath=404_18_393
Both 104 and 104aB use the SP1039 B200. It is critically damped suspension, Q~0.45 with short voice coil and large air gap.
The Calinda bass reflex uses the overdamped B200 SP1054, which has a Q of 0.23.. Long voice coil smaller air gap.
I once mixed the two up and used the 1054 on the 104. No good. |
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T.O. Chef
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Location: Toronto Canada
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| Posted: Sun Feb 27, 2011 3:57 am Post subject: |
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Ah!
Mysteries solved. Correct B-200's in use. Bolts & T-nuts on them and the passives. Screws on the T-27's as prescribed
I have wondered how a Calinda woofer would perform in 104 cabinet. Interesting to know the experiment's been done and the result's now documented.
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audiolabtower
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| Posted: Sun Feb 27, 2011 1:33 pm Post subject: |
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| yes, good info about the 1054 in the 104 box. I often wondered what the difference was compared to 1039, given the Calinda and 104 were so close in design, and what would happen if you tried each in the other |
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Nimo_jon
Intermediate Contributor 25+
Joined: 21 Feb 2011
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Location: Singapore
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| Posted: Thu Mar 03, 2011 5:50 pm Post subject: |
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The 104 is sealed box design. Tapping the B200 will cause an associated movement on the passive reflector.
The Calinda is bass reflex design.
I would think of the two as entirely different designs.
The Q of the two drivers are very different.
Still, as an owner of a 20 year old Carton III, I prefer the 104.
Dang, I got bitten by the KEF bug again. |
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proffski
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Location: Tewkesbury UK
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