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The CWIV filter that I put on page 14 is a Rev A, this one is a Rev B, so it seems to me that this is an evolution of CWIV

:RÉ

 

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On 1/12/2020 at 2:19 PM, mustang_flht said:

I believe someone asked to see the CW4 filter: here it is

 

vm4q.jpg

 

 

You can send me 💙

 

 

:D

 

here is Rev A

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my stash of black ash.  I will have that many in cherry and also that many in walnut here in a day or two.  

 

No photo description available.

 

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I just got notice my Heresy IVs shipped, so it seems the Heritage line is in production.

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On 1/12/2020 at 5:19 AM, mustang_flht said:

I believe someone asked to see the CW4 filter: here it is

 

vm4q.jpg

 

 

You can send me 💙

 

 

:D

 

Old thread here, but I just ordered a pair of Cornwall IV and I am going to upgrade the capacitors in the crossover.  The photo above is nice, but a little hard to make out the values.  I will leave the 60 uF cap alone, but it looks like two 1.5 uF, one 4 uF and one 7 uF.   Can anyone who has examined the crossovers confirm the values?  Also, the two resistor values.

thanks!

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On 4/24/2020 at 6:50 AM, CANT said:

C0866516-AC2F-45B9-897D-0AC93DBDA4CB.jpeg

 

On 4/22/2020 at 1:57 PM, mustang_flht said:

 

The CWIV filter that I put on page 14 is a Rev A, this one is a Rev B, so it seems to me that this is an evolution of CWIV

 

 

Hi @dls_123

 

On your recent version of CWIV there will certainly be network B. Look at the diagram of version B,  @CANT has read the capacitor values for you 👍😎

 

It is not obligatory to change the values to //, so change in priority 7µF, 2.75 and 2.25µF :)

 

For the resistors, I think it's 8 and 30ohms, look at the diagram of CANT, only 30ohms and in series on the signal!

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I would like to see how the signal reacts when removing the "bi wire" strap.  Also, both a and b look the same minus the tape around the inductors.  Not sure what I am missing here, maybe a cap value I can not see?

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5 hours ago, mustang_flht said:

 

Hi @dls_123

 

On your recent version of CWIV there will certainly be network B. Look at the diagram of version B,  @CANT has read the capacitor values for you 👍😎

 

It is not obligatory to change the values to //, so change in priority 7µF, 2.75 and 2.25µF :)

 

For the resistors, I think it's 8 and 30ohms, look at the diagram of CANT, only 30ohms and in series on the signal!

Yes, saw the schematic, I guess I have to wait for speakers to arrive so I can pull the woofer and be certain which version crossover.  The schematic does make it clear the small caps are the important ones.   I will put Mills or other nice wirewounds in for the resistors, but again I guess I wait and see.   I can use VCap ODAM for the caps as I am an OEM because I build tube amps for a living and get good prices from Chris.  He will pull caps for me that are very close to those values and certainly within the 5% spec Klipsch uses.  I will probably put damping material on the horns too just because I can.  They will see only tubes in front of them so should sound very nice.

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2 hours ago, The Dude said:

I would like to see how the signal reacts when removing the "bi wire" strap.

 

How would it be any different?

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1 hour ago, dls_123 said:

Yes, saw the schematic, I guess I have to wait for speakers to arrive so I can pull the woofer and be certain which version crossover.  The schematic does make it clear the small caps are the important ones.   I will put Mills or other nice wirewounds in for the resistors, but again I guess I wait and see.   I can use VCap ODAM for the caps as I am an OEM because I build tube amps for a living and get good prices from Chris.  He will pull caps for me that are very close to those values and certainly within the 5% spec Klipsch uses.  I will probably put damping material on the horns too just because I can.  They will see only tubes in front of them so should sound very nice.

 

Just curious, are you serious about tinkering with a new crossover on a new cabinet?

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8 minutes ago, PrestonTom said:

 

Just curious, are you serious about tinkering with a new crossover on a new cabinet?

I wondered about that too. Those new CF4's are a tightly integrated system and I for one would never second guess what Roy has done. I am thinking if I was not happy with them I would start looking at pro line speakers. I understand the fun of experimenting but not on something like CW4's

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I have upgraded the crossovers on khorns and cornscalas in the past. But I don't feel any desire to monkey with the CW IV. I think Roy nailed this one down pretty good.

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1 hour ago, Dave A said:

I wondered about that too. Those new CF4's are a tightly integrated system and I for one would never second guess what Roy has done. I am thinking if I was not happy with them I would start looking at pro line speakers. I understand the fun of experimenting but not on something like CW4's

I am certainly going to listen to them.  I have seen photos of the crossovers.  I am not going to change any values at all, but those are run of the mill poly caps and resistors in there.   Putting a very high quality oil damped poly cap like the VCap ODAM is not going to change the way the crossover works.   It will improve the quality of the signal flowing into the drivers though.  They are a more detailed cap and not bright in any way once they run in for 100+ hours.  I am not trying to be confrontational in any way.  Things are built to a price point.  That is all.   I have built literally over a thousand pieces of tube audio equipment between restorations of vintage and my production custom gear.  I have heard tons of different capacitors.   I understand voicing certainly.   But I can see what caps are in there now and I know what I want to use sounds like.  There is no comparison.  I will keep the oem parts and if I don't like it I will put them back.   I am not going to tell other people what to do at all and post that my way is best or anything like that.  I am sure it is a great speaker.  I had original cornwall I years ago and they improved significantly when I replaced the crossover caps and resistors.  Again, it is not my goal to say anything bad about Klispch or tell others what to do.  I am not trying to offend anyone.  I am not trying make a business of Cornwall crossover mods or anything like that.  No commercial intent whatsoever.  I intend to listen to these for a long time.  I have had a couple of customers with my amps say how much they like them with the Cornwall IV.  One of the customers damped the horns with dynamat or some other similar material and told me he could tell the improvement right away.   I trust him.  So I am just going on my journey that is all.

 

cheers....Don

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8 hours ago, dls_123 said:

  So I am just going on my journey that is all.

 

cheers....Don

 if  you decide to   build a new crossover for the CW IV  ,  and  you got no use for that CWIV stock  crossover , PM me , I would buy it outright --tx

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3 hours ago, RandyH000 said:

 if  you decide to   build a new crossover for the CW IV  ,  and  you got no use for that CWIV stock  crossover , PM me , I would buy it outright --tx

Hi

I am not going to build a new crossover, just change what looks like three capacitors and maybe one or two resistors.  Have to see which crossover is in mine.  Not changing the board out, just a few parts and will use exactly the same values, so not changing the circuit at all and using the same boards.

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4 hours ago, Chief bonehead said:

Good luck. 

Thanks.  It is not a knock on the speaker and I will listen to it first for 100+ hours.   I build things for a living, so I am experimenting.  Certainly I am not going to change the crossover circuit at all because that has been worked out by the designer for the drivers used.

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