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Additional damping for Cornwall IV


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I am replacing the binding posts.  While inside the cabinet, I noticed lots of undamped space.  I am tempted to add some 1/2" foam on the rear panel.  But then again, I figure the panel was left uncovered for a reason. Has anyone added damping to a Cornwall IV, and if so, how did it turn out?  Where did you add damping?  What kind of material?

 

Inside C IV.JPEG

Edited by Thunderball
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It is a new speaker and not muck tweaking is expected to be found yet.

And according to reported experiences from members of the community here that actually have these, tweaking is not needed since speakers are designed very well.

If you have already opened them, you can try some damping with what you think would be the best material, and hear the difference.

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The Cornwall lV’s LF/Cabinet was redesigned to maximize its performance with special attention paid to the ports implementation and significant reduction(practically eliminating it IMHO) of acoustical box resonances.


I would strongly discourage changing anything and especially how the foam has been implemented/placed because that is an important part of the design.  
 

miketn

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47 minutes ago, RandyH said:

the CW IV has a 10 years warranty  , is there anything wrong with the binding posts ?

They are not keyed into the plates and they spin before the speaker wires are tightened sufficiently (in my opinion).  They are also too shallow to fully seat a banana plug.   The post inside the cabinet looks to be about a number 6 or 8 machine screw size.

5B8C9C12-8060-4A8E-AD7B-ABFA5F7A3C7E.jpeg

5D275797-F867-45A9-B2E6-AE46C83FA0F0.jpeg

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17 hours ago, Thunderball said:

I am replacing the binding posts.  While inside the cabinet, I noticed lots of undamped space.  I am tempted to add some 1/2" foam on the rear panel.  But then again, I figure the panel was left uncovered for a reason. Has anyone added damping to a Cornwall IV, and if so, how did it turn out?  Where did you add damping?  What kind of material?

 

Inside C IV.JPEG

 

Egads!  Put your speakers back together as they were and leave them alone. :)

 

I'm pretty sure that if a bunch of wadding material would have made them sound better, the engineers at Klipsch would have added such.  This picture looks exactly like the inside of CW3.

 

That said, a peek inside Klipsch Heritage speakers is a bit surprising.  ..They are quite primitive when compared to the insides of other comparably priced (or even much cheaper) speakers.  Goes to show it's all about outcome.  ..If the speakers sound great, does it really matter if they seem rather crudely constructed?

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3 hours ago, Thunderball said:

They are not keyed into the plates and they spin before the speaker wires are tightened sufficiently (in my opinion).  They are also too shallow to fully seat a banana plug.   The post inside the cabinet looks to be about a number 6 or 8 machine screw size.

 

ok -  shoot us a picture of the new binding posts , I hope it all works out -

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4 hours ago, Thunderball said:

They are not keyed into the plates and they spin before the speaker wires are tightened sufficiently (in my opinion).  They are also too shallow to fully seat a banana plug.   The post inside the cabinet looks to be about a number 6 or 8 machine screw size.

5B8C9C12-8060-4A8E-AD7B-ABFA5F7A3C7E.jpeg

5D275797-F867-45A9-B2E6-AE46C83FA0F0.jpeg

 

As long as it isn't loose it doesn't matter. If it touches it talks.

 

 

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2 hours ago, wuzzzer said:

No reason to use a banana plug unless you're constantly unplugging the wire.  Bare wire will always give the best signal transfer.

The banana plugs are for jumpers.  If I replace the binding posts, I will probably tie everything together on 2 posts instead of 4 and eliminate the jumpers.

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7 hours ago, Thunderball said:

I am thinking that you are correct and I may just put them back together and leave everything alone!

Did you have moments of joy listening to your new cornwalls?
Was there anything you didn't like about listening to it?
What motivated you to take the speaker apart?
Did you have specific ideas about how the sound should change/improve?
Do you know what specific action you took for what specific reason?
What improvement is the plugging of damping material supposed to bring about?
What improvement should the modification of the terminals bring about?
What experience do you have and on what knowledge base should all changes be made?
Wouldn't it be better to respect a product that is the result of 60 years of development? And instead it would be a nice hobby if you build your own speakers parallel to the existing Cornwall 4, with wood materials from the hardware store and a driver set with xover from Walmart? Then you can fully realize yourself, test all the possibilities and listen to good music with beautiful sound of the Cornwalls while you tinker with your new individual speakers.

 

Seriously, sometimes I think that fantasies of the alleged improvement projects actually have a destructive component.
I respect very much that you say in your last post that you leave the Cornwall as they were created. And I am very happy that this forum has helped you not to do things that are not logically understandable.

Actually we are all sometimes a bit tempted to change things without really knowing why this or that measure should make us happier. The desire to change for the sake of change. This is a problematic phenomenon especially with acoustics...we pretend to want to improve something but as a consolation because it is very difficult we imagine that we enjoy the change. 

To sum it up I am very happy that your thread has caused a rethink with you.
 

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7 minutes ago, KT88 said:

Did you have moments of joy listening to your new cornwalls? yes
Was there anything you didn't like about listening to it? yes,  Seems a little harsh in the high mid / low highs
What motivated you to take the speaker apart? Binding posts spinning when trying to tighten up speaker cables
Did you have specific ideas about how the sound should change/improve? Maybe kill some harshness by padding the back wall?
Do you know what specific action you took for what specific reason? With the binding posts, Yes.  With the foam, No
What improvement is the plugging of damping material supposed to bring about? Good question, I wanted to know other's experiences
What improvement should the modification of the terminals bring about? The ability to securely fasten the speaker wires without the posts turning and the ability to fully seat the banana plugs
What experience do you have and on what knowledge base should all changes be made? Mostly wishful thinking when it comes to damping.  The binding posts are a mechanical issue
Wouldn't it be better to respect a product that is the result of 60 years of development? And instead it would be a nice hobby if you build your own speakers parallel to the existing Cornwall 4, with wood materials from the hardware store and a driver set with xover from Walmart? Then you can fully realize yourself, test all the possibilities and listen to good music with beautiful sound of the Cornwalls while you tinker with your new individual speakers. I gave my respect in the form of American Dollars which represent a significant amount of time that it took me to earn those dollars.  The hardware store sells better wood materials than MDF.  Not aware of any WalMart Xovers.  I am aware of some quality manufacturers of drivers.

 

Seriously, sometimes I think that fantasies of the alleged improvement projects actually have a destructive component. I agree, that is why I will probably leave them alone.  Just asking for other's experiences.
I respect very much that you say in your last post that you leave the Cornwall as they were created. And I am very happy that this forum has helped you not to do things that are not logically understandable.

Actually we are all sometimes a bit tempted to change things without really knowing why this or that measure should make us happier. The desire to change for the sake of change. This is a problematic phenomenon especially with acoustics...we pretend to want to improve something but as a consolation because it is very difficult we imagine that we enjoy the change. Agree

To sum it up I am very happy that your thread has caused a rethink with you. Thanks
 

 

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11 hours ago, Thunderball said:

 

Thank you for your plausible answer. I fully respect your criticisms of the sound of your Cornwalls and it is your personal and therefore true impression. Thus, your attempts to change have a motivation that I can understand.
I don't want to defend everything concerning the Cornwalls. Still, a few ideas. It is a speaker that can be dependend in the sense that it will show whatever it is fed. What electronics are you using, transistors or tubes?  Both can sound very good but weaknesses also become apparent. Another factor is, one thread is just about how much break-in time a Cornwall needs (I personally think that after 50 hrs most of it is broken in).
Additionally, it may matter what kind of speakers you had before and what you are used to. I listen to my old 1977 Lascala for over a year.... Before that I had speakers to BBC specifications, Stirling Broadcast LS3/6 and the famous little LS3/5. On the one hand they are very strong in timbre and they don't have unpleasant freq ranges.On the other hand, such types lack the dynamics and liveliness of the Cornwall. 
It depends on many factors, of course also on the kind of music someone likes.
In no way did I mean to deny you critical ability. It was your modification ideas that irritated me a bit especially when I didn't know why in the first place.

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6 hours ago, KT88 said:

Thank you for your plausible answer. I fully respect your criticisms of the sound of your Cornwalls and it is your personal and therefore true impression. Thus, your attempts to change have a motivation that I can understand.
I don't want to defend everything concerning the Cornwalls. Still, a few ideas. It is a speaker that can be dependend in the sense that it will show whatever it is fed. What electronics are you using, transistors or tubes?  Both can sound very good but weaknesses also become apparent. Another factor is, one thread is just about how much break-in time a Cornwall needs (I personally think that after 50 hrs most of it is broken in).
Additionally, it may matter what kind of speakers you had before and what you are used to. I listen to my old 1977 Lascala for over a year.... Before that I had speakers to BBC specifications, Stirling Broadcast LS3/6 and the famous little LS3/5. On the one hand they are very strong in timbre and they don't have unpleasant freq ranges.On the other hand, such types lack the dynamics and liveliness of the Cornwall. 
It depends on many factors, of course also on the kind of music someone likes.
In no way did I mean to deny you critical ability. It was your modification ideas that irritated me a bit especially when I didn't know why in the first place.

My source is a Luxman D-03X CD player and a Bluesound Vault 2i.   The integrated amplifier is a Luxman L-509X.   Interconnects and speaker wire are Clarus Aqua.

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5 minutes ago, Thunderball said:

My source is a Luxman D-03X CD player and a Bluesound Vault 2i.   The integrated amplifier is a Luxman L-509X.   Interconnects and speaker wire are Clarus Aqua.

So all very good choices! I also have a 2021 Bluesound Node streamer with Tidal MQA and a lot of Tunein Jazz Stations, a Meridian G8 cd player since 20 years and a vinyl player then Downstream Mcintosh tube gear.

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On 1/14/2022 at 9:33 AM, Thunderball said:

They are also too shallow to fully seat a banana plug.  

 

 

I see your reasoning regarding the change of binding posts.

However, them being too shallow to fully seat banana plug is nothing to worry about.

Binding post on all the sets of speakers that I have are like that. Just push the banana plug until it stops, and if it fits tight that is enough for signal to travel. If cosmetics are what bothers you, then yes, you could change them.

And for harsh mids-highs, just let the speaker play a few weeks. And if they are still harsh, see how is your room acoustics. May be try to play with speakers placement and some wall absorption on first reflection zone.

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  • 3 weeks later...

Hi to  all , 

 

I am start build  Cornwall III . Any  body  can  help  with  photos  INSIDE Klipsch  Cornwall 

I  find different  on the  Youtube ...I am  confused  how  can  make  better  

how best to dampen inside help with advice and photos thanks a lot

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