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Thread: Capacitor suggestions for Klipsch Heresy H

  1. #1
    Join Date: Jun 2015

    Location: London

    Posts: 65
    I'm Peter.

    Default Capacitor suggestions for Klipsch Heresy H

    Hi

    I am looking to replace the capacitors on a pair of very early Klipsch Heresy H.
    I have found a supplier of parts and upgrades (Bob Crites) in the US but the shipping costs are too high.
    He is suggesting Sonicaps.


    Could anyone recommend replacement capacitors in the UK. I am new to this so any help is great.
    I realise prices can vary dramatically but I guess I would like to spend no more that £10 per capacitor max?

    The current capacitors are marked with:

    1. IndustrialCond Corp 46A001 (1MFD 200 VDC)
    2. Aerovox 430M (2.0 MFD 400VDC)

    Pics of crossovers below

    IMG_20160710_225225.jpgIMG_20160710_225142.jpg
    --------------------------------------------------------------------------------------------------------

  2. #2
    Join Date: Mar 2012

    Location: Gloucestershire

    Posts: 3,377
    I'm Paul.

    Default

    Quote Originally Posted by pbroido View Post
    Hi

    I am looking to replace the capacitors on a pair of very early Klipsch Heresy H.
    I have found a supplier of parts and upgrades (Bob Crites) in the US but the shipping costs are too high.
    He is suggesting Sonicaps.


    Could anyone recommend replacement capacitors in the UK. I am new to this so any help is great.
    I realise prices can vary dramatically but I guess I would like to spend no more that £10 per capacitor max?

    The current capacitors are marked with:

    1. IndustrialCond Corp 46A001 (1MFD 200 VDC)
    2. Aerovox 430M (2.0 MFD 400VDC)

    Pics of crossovers below

    IMG_20160710_225225.jpgIMG_20160710_225142.jpg

    I wouldn't worry too much about looking for new matching electrolytic capacitors like those. They are a very simple crossover design, and the capacitor values are a small enough value where any differences at the crossover frequencies of just replacing with a polyprop will not have as marked a difference on the original crossover point as the drift that these may well have suffered over the years. For good quality crossover replacements at those values within your budget, look no further than either Claritycap ESA or Mundorf Evo Oil capacitors. Both would be suitable, both rated properly, both perfectly adequate. The tolerances on the originals would not have been much more than 10 to 20%, so again, altering ESR by going to poly's in this instance in such a simple network is less important than getting the right values. Save yourself a lot of grief and just use one of the above. If on a budget, Solens at half the price would also be perfectly adequate. You can always add a small resistor of say 0.5 Ohms value in series if you want to match the original ESR as near as dammit but tbh, the originals would not have been designed to meet very stringent acoustic slope parameters in that design.

  3. #3
    Join Date: Jun 2015

    Location: London

    Posts: 65
    I'm Peter.

    Default

    Thanks for the suggestions and quick reply.
    As Im a novice can I just clarify what I need to match.

    I must look for a capacitor that has the exact uF / MFD value and the VDC value should be the same or higher. Is this correct?
    --------------------------------------------------------------------------------------------------------

  4. #4
    Join Date: Mar 2012

    Location: Gloucestershire

    Posts: 3,377
    I'm Paul.

    Default

    Quote Originally Posted by pbroido View Post
    Thanks for the suggestions and quick reply.
    As Im a novice can I just clarify what I need to match.

    I must look for a capacitor that has the exact uF / MFD value and the VDC value should be the same or higher. Is this correct?
    Hi Peter

    don't worry too much about voltage rating as all suitable capacitors will be more than adequately rated. Anything 50V rated or higher will be fine, but I tend to use min 100V for crossover use, allowing plenty of margin. Standard polys tend to be 250V or more, so no worries there. Just look for like for like values, ie 1uF and 2uF (uF = MicroFarads).

  5. #5
    Join Date: May 2008

    Location: A Strangely Isolated Place in Suffolk with Far Away Trains Passing By...

    Posts: 14,535
    I'm David.

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    You will hate me for saying this, but are these speakers really worth messing about with? What is it you think will 'improve' by changing caps? Is it because the crap ones fitted to UK made 70's speakers go off so badly you think a US made screamer like the Heresy will really benefit just cos the caps are new?

    Sorry, I truly mean no offence, but the Heresy is so characterful and 'individual' as a product, I don't think a couple of designer caps is going to make them better in all honesty, as they have more fundamental characteristics nothing to do with the crossovers - in my personal opinion of course...

  6. #6
    Join Date: Mar 2012

    Location: Gloucestershire

    Posts: 3,377
    I'm Paul.

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    Quote Originally Posted by DSJR View Post
    You will hate me for saying this, but are these speakers really worth messing about with? What is it you think will 'improve' by changing caps? Is it because the crap ones fitted to UK made 70's speakers go off so badly you think a US made screamer like the Heresy will really benefit just cos the caps are new?

    Sorry, I truly mean no offence, but the Heresy is so characterful and 'individual' as a product, I don't think a couple of designer caps is going to make them better in all honesty, as they have more fundamental characteristics nothing to do with the crossovers - in my personal opinion of course...
    They are very old and probably very dried out 'lytics that stand little chance of being anywhere close to spec. Changing them costs little and the originals can be kept and put back in if needed. It's hardly irreversible surgery. They don't have to be "designer caps" DJSR, as Solens would work fine. Put it this way, there's nothing to lose by trying is there now?


    If Peter wants to send the originals to me, I am more than happy to test them for him. If they don't need changing, all well and good, but I'll happily have a bet with you that they'll be miles out. Despite rose tinted glasses and purist nonsense, most speakers of this age can and often do need some TLC.

    You may well consider them "screamers" but Peter simply wants them back in specification, or at least as close as he can. Other things will also drift with speakers over time meaning that just a cap change, in some cases, will not return a speaker to exact acoustic spec, but with these, you'll get as close as probably makes no odds, so my advice to Peter is to try it and see.

  7. #7
    Join Date: Jun 2015

    Location: London

    Posts: 65
    I'm Peter.

    Default

    Quote Originally Posted by DSJR View Post
    You will hate me for saying this, but are these speakers really worth messing about with? What is it you think will 'improve' by changing caps? Is it because the crap ones fitted to UK made 70's speakers go off so badly you think a US made screamer like the Heresy will really benefit just cos the caps are new?

    Sorry, I truly mean no offence, but the Heresy is so characterful and 'individual' as a product, I don't think a couple of designer caps is going to make them better in all honesty, as they have more fundamental characteristics nothing to do with the crossovers - in my personal opinion of course...
    I'm not sure what to expect but for the good part of 20 quid or so I thought I would try it out. I have no intention of getting rid of the old ones as they are circa 1964 and wanted to keep the original speaker intact.
    Changing caps were suggested by Bob Crites (who seems to be one of the Klipsch "gurus") hence the questions.
    I must say they are rather intriguing. The word screamer I see associated with them often. Im not sure what is meant by it as I don't find them particularly harsh but maybe the word screamer means something else. I do find the bass is the real problem but there's not much you can do about that.

    PS. No offence taken and I dont hate you
    --------------------------------------------------------------------------------------------------------

  8. #8
    Join Date: May 2008

    Location: A Strangely Isolated Place in Suffolk with Far Away Trains Passing By...

    Posts: 14,535
    I'm David.

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    The Heresy is an odd one to me, if nobody else. It's not small, yet has a small brightly lit speaker balance, only VERY LOUD!!! It's certainly supremely funky and engaging a listen, but needs a very sweetly coloured amp to gel I think myself - AI 500 springs to mind for some reason if you can find a working one.

    I bought some 1uF poly caps from Rapid Electronics for the IMF's -

    https://www.rapidonline.com/jb-capac...acitor-08-1314

    - and think they're just fine, despite low cost. Seriously though, if a genuine bonafide Klipsch guru suggests a cap change, then brilliant - go for it! Hifi Collective do some fine film caps for speakers and so do Falcon, although the postage rates from both are high, so be forewarned.

  9. #9
    Join Date: Mar 2012

    Location: Gloucestershire

    Posts: 3,377
    I'm Paul.

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    Quote Originally Posted by DSJR View Post
    The Heresy is an odd one to me, if nobody else. It's not small, yet has a small brightly lit speaker balance, only VERY LOUD!!! It's certainly supremely funky and engaging a listen, but needs a very sweetly coloured amp to gel I think myself +1

    - AI 500 springs to mind for some reason if you can find a working one.
    In good nick, I'd not have put the AI500 anywhere near the top of "my most coloured sounding valve amps" or anywhere close to! Take any Italian or Chinese single ended valve amp, and just about all of those might qualify!


    I bought some 1uF poly caps from Rapid Electronics for the IMF's -

    https://www.rapidonline.com/jb-capac...acitor-08-1314

    - and think they're just fine, despite low cost. Seriously though, if a genuine bonafide Klipsch guru suggests a cap change, then brilliant - go for it! But if a loudspeaker specialist who might actually know what he's talking about suggests it, ignore him Hifi Collective do some fine film caps for speakers and so do Falcon, although the postage rates from both are high, so be forewarned.
    Nonsense. Adding £3.85 or whatever 2nd class postage is from HFC is hardly "high" (I know because I paid that for a cap order this week). Packaging costs are what they are and the post office/Royal mail charge what they charge. Both Falcon and HFC sell low cost caps too.

    David, there are times when your logic, or lack of it, is just absolutely baffling .

  10. #10
    Join Date: May 2008

    Location: A Strangely Isolated Place in Suffolk with Far Away Trains Passing By...

    Posts: 14,535
    I'm David.

    Default

    Quote Originally Posted by Reffc View Post
    David, there are times when your logic, or lack of it, is just absolutely baffling .
    I don't understand. The AI 500 was a soft toned shweety of an amp, no hf dynamics at all and all the early ones blew up, hence my comments!

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