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Old 20th January 2013, 08:25 AM   #1
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Default wharfedale dovedale

For anyone whose interested i did a parameter test on some dovedale 12in bass units (i think) 3's and are 6 to 8ohms, green felt flange, square magnet rubber roll suspension. My findings were-

Fr 20.712Hz
DC ohm 5.4
Qts 0.342
Qes 0.4
Qms 2.343
Vas 319.1L
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Old 24th April 2013, 04:37 AM   #2
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Thanks for this info. I just bought a pair second-hand for NZ$75, advertised as reasonable condition with all drivers working.

Sadly, on getting them home I found there is *zero* bass. The rubber surrounds are as hard as bakelite (but not as tough, it cracks when pushed ). I'm waiting on a quote from an Auckland speaker specialist now for a repair job - replacing surrounds. Your info might come in handy depending on how they reply to my enquiry.

If I can afford the repair, as the other drivers seem fine, I'm planning on replacing the x-over caps and enjoying some more 70s British speaker goodness.

(I have a pair each of Goodmans SL Magnums and Mezzos, both from mid-70s, both sound great! The Magnums have more bass punch but the Mezzos are the clearest speakers I've ever heard - bar none. I'm hearing new stuff in music I've been listening to since the 70s! Also the odd bit of lyric that has bugged me for decades is now clear as a bell - awesome speakers.)

Regards,
/S.
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Old 24th April 2013, 05:33 AM   #3
VaNarn is offline VaNarn  Australia
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Demidemon,when the rubber roll surround hardens;a common ageing process,there is always a possibility that the cone will be creased and/or the voice coil former, also .Hopefully your cones are still o.k. as it is hard to get cones that are equivalent to the originals.
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Old 24th April 2013, 05:56 AM   #4
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Quote:
Originally Posted by VaNarn View Post
Demidemon,when the rubber roll surround hardens;a common ageing process,there is always a possibility that the cone will be creased and/or the voice coil former, also .Hopefully your cones are still o.k. as it is hard to get cones that are equivalent to the originals.
Hi VaNarn, Thanks for the reply. The speakers have been in storage for the best part of a decade and I think the surrounds hardened then. The cones and what I can see of the bottom end look pristine, like the day they left the factory - Except a little discolouration in a few places near the surround. If I had to guess I'd say someone tried treating the rubber with silicone oil or Armourall and a little crept onto the cone edge.

If I'm right in my assumption then hopefully it's not an issue, either with adhesive bonding or strength of the cone - it still feels hard and stiff in those (small) areas.

Thanks again.
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Old 12th July 2013, 06:15 AM   #5
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I picked up a pair of Dovedale III a few days ago (12 inch woofers). The rubber rolls were brittle like glass and broken; so I have to replace them. Unfortunately this size seems rather rare. Local suppliers of speaker parts (including foam rings) replied they can not provide such rubber rolls.

Any tip that would lead to a supplier of those rubber rolls would be very much appreciated. As a second option I would go for foam rings.

Thanks a lot for any replies.
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Old 24th July 2013, 10:11 AM   #6
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does anybody know what crossover frequencies has dovedale 3? I have many caps gone, so I would use an active crossover insteade of changing all caps.

@cone haed
do you have tested also the other drivers?

thanks to all
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Old 6th April 2014, 12:43 AM   #7
kiwi88 is offline kiwi88  United States
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400 + 3500 cycles
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Old 6th April 2014, 01:00 AM   #8
sreten is offline sreten  United Kingdom
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Hi.

An active crossover is going to be very wrong.
Caps are cheap and modern nonpolar electrolytics
are miles better than the old stuff, just replace.
Don't replace film caps, they should be fine.

rgds, sreten.
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Old 6th April 2014, 02:38 AM   #9
GM is offline GM  United States
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Quote:
Originally Posted by kiwi88 View Post
400 + 3500 cycles
Saw these, but then it's 450, 3500 on this doc: http://new-hifi-classic.de/Gallery_M...LE_3_a_(1).jpg

....and 600, 5000 Hz here: http://wegavision.pytalhost.com/Aren...Wharfedale.jpg

GM
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Old 28th April 2014, 09:12 AM   #10
Tomom is offline Tomom  Australia
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I got pair of those Wharfedale speakers with same problem: hard surround. Does anyone know where to get new surrounds ( yes, it is an odd size)? Thanks..
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