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darkmatter
Junior Contributor 20+
Joined: 26 Aug 2010
Posts: 21
Location: Eastern England
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 Posted: Sun May 19, 2019 10:23 pm Post subject: |
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I am intrigued by the bass loading technique used on the Griffin Studio Electronic 85. I can only assume that the internal B200 is to acoustically add mass to the B139?
Will have to take a closer look to try and ascertain what is going on. |
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Glue
Junior Contributor 10+
Joined: 29 Feb 2020
Posts: 10
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| Posted: Tue Mar 03, 2020 11:39 pm Post subject: Griffin 25 |
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I acquired some 25`s lately - but was surprised to find (except of a botched crossover) nothing that should resemble the original units - 
Would you have any information into what units of younger age could fit in and
perhaps have had experience in building up a new crossover? |
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exkefman
Intermediate Contributor 25+
Joined: 19 Jun 2015
Posts: 45
Location: Cheshire, England
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| Posted: Wed Mar 11, 2020 1:58 am Post subject: |
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| speakerguru wrote: | | I remember one "high end" Japanese "engineer" winding and unwinding crossover inductors from behind a loudspeaker while "listening" to the sound from the front (of the loudspeaker) with the aid of a large mirror.................. |
I remember the chap too...and eventually after his "golden ear" had tweaked the crossover design, his firm become the official KEF distributor and they placed an order for 105/3S and 103/4S versions - the product names given to these "special versions - and they had to be in walnut veneer and with brown grilles (rather than the standard black ones).
_________________
regards
Tim
(I used to work for KEF from 1988-1995 - you can see my "profile" here: http://www.hifiloudspeakers.info/speakertalk/viewtopic.php?t=1706) |
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Glue
Junior Contributor 10+
Joined: 29 Feb 2020
Posts: 10
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| Posted: Thu Apr 02, 2020 4:14 pm Post subject: |
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To deviate from the speaker section -
I have got hold of a Griffin G200 amp with a burnt transformer -
Could anyone point me towards the specs of the unit ?
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Glue
Junior Contributor 10+
Joined: 29 Feb 2020
Posts: 10
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| Posted: Tue Apr 28, 2020 12:06 am Post subject: |
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After I had some issues getting the right speakers for my supposably Griffin 25 cabinets (the bass was all gone and the tweeter an Audax of miniature size)
I was lucky getting some Coles 4001, but I struggle with a the Seas 21 ?
Any information which exact model it could be would be great -
or was it a Kef B200 now ?????  |
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Glue
Junior Contributor 10+
Joined: 29 Feb 2020
Posts: 10
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| Posted: Sat May 02, 2020 9:02 pm Post subject: |
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| lexi wrote: | Any comments appreciated.
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Well, I have purchased the same but for the Seas which had been extracted for some cheap rubbish . 
The tweeter was indeed double sided sticky pad taped to the `plank`and an 5cm square AUDAX unit -
So my question would be are they genuine?
If yes would a Seas 21 TV EW plus some Coles 4001 do the job ????
[/img][/list] |
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Glue
Junior Contributor 10+
Joined: 29 Feb 2020
Posts: 10
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| Posted: Fri May 08, 2020 8:16 pm Post subject: |
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I recently tried to revive the Griffin Cabinets with SEAS 21" TV EW and Seas H087 but the new crossover I created didn`t work at all .
Any suggestions for a 6dB crossover?
The Griffin G 200 is back from repairs and performs extremely well!
A new transformer, 4 new output transistors and a cap replaced and it plays
clear, gutsy and I guess after some burning in as smoothly as my Valve amp .
Now it fills my Calindas with sheer happiness
https://www.flickr.com/photos/187315959@N06/49870877033/in/dateposted-public/ |
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speakerguru
Über Contributor 1000+
Joined: 18 Nov 2005
Posts: 1192
Location: Green Hut, Tovil
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| Posted: Sun May 10, 2020 9:12 am Post subject: |
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| Glue wrote: | | ...Any suggestions for a 6dB crossover?... |
Don't do it. Knowing what I know, having tackled every aspect of speaker design during my years at KEF, I would not attempt to design a crossover at home without the ability to make acoustic and electrical measurements of amplitude and phase. |
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