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Thread: Kef Corelli SP1051 - possible fix and servicing.

  1. #11
    Join Date: Sep 2014

    Location: brighton uk.

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    I'm jamie.

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    falcon acoustics are also a good choice for alpcaps edward,probably more choice with them too.
    My System/ Yamaha NS1000M speakers ,Pioneer PLC-590 turntable,Pioneer PA-5000,Alphason HR-100S-MCS,Zeta tonearms,Denon 103SA Cartridge's,Denon HA-500 Head Amp, John Wood KT88 Valve Amp,Sony 700ES Amp,Sony X555ES CD Player, Nakamichi ca5 pre amp ,

  2. #12
    Join Date: Mar 2017

    Location: London N2

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    I'm Edward.

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    Quote Originally Posted by walpurgis View Post
    I used alcaps from this seller: https://www.ebay.co.uk/itm/Bipolar-C...BbyjrfSbH0-1Tg

    I think they're 50 volt rated or above, more than adequate. You'll find some are larger than the originals. Not a problem. Don't cut the wires too short.

    The seller, Cricklewood Electronics will probably not stock the 0.56uF value. I can let you have a couple if you need them.
    Thanks Geoff. I'm gonna try desolder everything tomorrow, measure all the caps, make a list and see how I go. Cricklewood is not far from me so may just pop down there. Let's see if I need 0.56uF and if so will contact you for a price etc. Thanks.


    Quote Originally Posted by jamie123 View Post
    falcon acoustics are also a good choice for alpcaps edward,probably more choice with them too.
    Yes I did notice that they have cap sets for a range of crossovers but not for the Kef one I have. Once I get all the caps off I'll see how I go with either Cricklewood or Falcon.

    I suspect I'm overthinking all of this, it is probably all very easy replacing the caps.
    Source: Win10 server, Win10 Mini-ITX Renderer running JRiver & Tidal/Roon
    DAC / Preamp: Perreaux DP32, Secondary DAC:
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    Amp: Radford Revival STA25, TubeHunter Class D IRS2092
    Speakers:, Tannoy Eatons, Kudos Cardea C2, BatPure Supertweeters (and others)
    Power Conditioner: ISOtek Qube 1k
    Currently resting: Radford Revival Prototype preamp, Paul Baldwin 405C amp, PMC LB1 Signature

  3. #13
    Join Date: Apr 2012

    Location: Southall, West London

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    I'm Geoff.

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    I'd not desolder until you have new parts to fit. It'll save having to keep referring to photos or diagrams to recall where bits went. Don't bother measuring the caps, even if they measure OK, their life expectancy is limited and replacing all is the best route. They are after all, forty years old.

    You won't need a price for the 0.56uF. They're free.

    I'm pretty certain Falcon will be dearer than Cricklewood Electronics.

    Yes. Changing caps is dead easy on these. Disconnect the crossover and take it right out, it's much easier that way. To disconnect the tweeter wires, just pull back the small piece of sleeving to expose the soldered joint. You may need some heat shrink sleeving to replace these.

  4. #14
    Join Date: Sep 2014

    Location: brighton uk.

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    falcon offer a better tolerance on the cap value geoff,thats why they may be slightly more expensive.
    My System/ Yamaha NS1000M speakers ,Pioneer PLC-590 turntable,Pioneer PA-5000,Alphason HR-100S-MCS,Zeta tonearms,Denon 103SA Cartridge's,Denon HA-500 Head Amp, John Wood KT88 Valve Amp,Sony 700ES Amp,Sony X555ES CD Player, Nakamichi ca5 pre amp ,

  5. #15
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 34,494
    I'm Geoff.

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    Maybe, but the tolerance is not too critical.

  6. #16
    Join Date: Mar 2017

    Location: London N2

    Posts: 680
    I'm Edward.

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    Thanks Geoff. Good points. I'll remove the xovers make a list and only when I get the new caps (and resistors?) replace them on a one to one basis. Thanks for the free offer.

    I was wondering about the tolerances mentioned. Some cheaper caps have a stated tolerance of 20% I wonder if that will make a noticeable audio difference on such old speakers.



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    Source: Win10 server, Win10 Mini-ITX Renderer running JRiver & Tidal/Roon
    DAC / Preamp: Perreaux DP32, Secondary DAC:
    Chevron Paradox
    Amp: Radford Revival STA25, TubeHunter Class D IRS2092
    Speakers:, Tannoy Eatons, Kudos Cardea C2, BatPure Supertweeters (and others)
    Power Conditioner: ISOtek Qube 1k
    Currently resting: Radford Revival Prototype preamp, Paul Baldwin 405C amp, PMC LB1 Signature

  7. #17
    Join Date: Sep 2014

    Location: brighton uk.

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    I'm jamie.

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    it is in my book,if your going to change the caps that work you might as well get them as close to the original designed value as possible no? otherwise why change them?
    but then im fussy about things like that lol
    My System/ Yamaha NS1000M speakers ,Pioneer PLC-590 turntable,Pioneer PA-5000,Alphason HR-100S-MCS,Zeta tonearms,Denon 103SA Cartridge's,Denon HA-500 Head Amp, John Wood KT88 Valve Amp,Sony 700ES Amp,Sony X555ES CD Player, Nakamichi ca5 pre amp ,

  8. #18
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 34,494
    I'm Geoff.

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    The Alcaps are 10% tolerance. Perfectly adequate. If the resistors measure OK, I'd not worry too much about them.

  9. #19
    Join Date: Sep 2014

    Location: brighton uk.

    Posts: 3,225
    I'm jamie.

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    yeah but they do 5% as well
    My System/ Yamaha NS1000M speakers ,Pioneer PLC-590 turntable,Pioneer PA-5000,Alphason HR-100S-MCS,Zeta tonearms,Denon 103SA Cartridge's,Denon HA-500 Head Amp, John Wood KT88 Valve Amp,Sony 700ES Amp,Sony X555ES CD Player, Nakamichi ca5 pre amp ,

  10. #20
    Join Date: Mar 2017

    Location: London N2

    Posts: 680
    I'm Edward.

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    I'll do a price comparison and see what the differences are. If not too much I'll go for the higher spec ones - at the very least when/if I sell the speakers I can say 'audiophile' caps have been used.

    But anyway this is only a fun learning project - I really don't need more speakers. My wife was amused when I told her I had got yet another set of speakers - this would be my 6th set. But she could not argue against 12.50.

    Why do resistors put a furry coat on? Did they get cold or something?
    Source: Win10 server, Win10 Mini-ITX Renderer running JRiver & Tidal/Roon
    DAC / Preamp: Perreaux DP32, Secondary DAC:
    Chevron Paradox
    Amp: Radford Revival STA25, TubeHunter Class D IRS2092
    Speakers:, Tannoy Eatons, Kudos Cardea C2, BatPure Supertweeters (and others)
    Power Conditioner: ISOtek Qube 1k
    Currently resting: Radford Revival Prototype preamp, Paul Baldwin 405C amp, PMC LB1 Signature

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