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Old 2nd June 2012, 01:52 AM   #711
soongsc is offline soongsc  Taiwan
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Has anyone tried using an iron type chassis instead of aluminum? I have measured significant line AC noise differences between these two.
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Old 2nd June 2012, 02:19 AM   #712
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Has anyone tried using an iron type chassis instead of aluminum? I have measured significant line AC noise differences between these two.
In this moment both working prototypes are chassis-less.
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Old 2nd June 2012, 07:23 AM   #713
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soongnc, what do you think about wooden case with copper lining? (much like old sansui special edition amps)

dario, would you go for 18v or 22v trafo for 4ohm load?

(thanks for your response, gents )
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Old 2nd June 2012, 08:16 AM   #714
soongsc is offline soongsc  Taiwan
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The low frequency magnetic field usually requires iron shield to redirect the field. Other metals that are non-magnetic are good for high frequency shielding. I think for simple testing of prototypes, one can use existing cookie/candy cans to cover it up and see of there is a difference or not.
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Old 2nd June 2012, 01:31 PM   #715
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I have received several inquiries about the actual value/quality of the Audyn True Copper caps for C13. Those who have heard them think they are great and well worth the price. The only way to know for sure is to hear what improvement they offer. At $79 for the caps, and another $15 - $20 in shipping/service charges, (I paid a total ~ $97) builders have just cause for reservations on that purchase.

I've made this suggestion often but nobody has posted it - so I will. If several builders in a country go together to get one pair, and swap them around, each person can audition them before making the purchase. This would of course require the use of quick connects, which is safe, convenient and easy to install/uninstall. This also avoids the need for repetitive soldering of the caps. No doubt about that first pair quickly finding a happy home at the end of the process. And remember - the caps just get better the more they are used.

Such an approach could be done by private PMs/eMails, or could be a sub-group buy here on the FE forum.

Just a thought
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Old 2nd June 2012, 01:42 PM   #716
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I have received several inquiries about the actual value/quality of the Audyn True Copper caps for C13.
Those caps are great quality ones and the best I've auditioned.

Suburra, who's auditioning my FE modules (including the True Copper), find them gorgeous.

Nevertheless don't think the FEs needs them to sound great.

Start with confidence the build with the Vishay/Sprague in BOM, they sound very good for the price.

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If several builders in a country go together to get one pair, and swap them around, each person can audition them before making the purchase.
This is a great idea so that builders can upgrade their modules after actually auditioning the True Copper.
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Old 2nd June 2012, 02:03 PM   #717
bcmbob is offline bcmbob  United States
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No doubt the BOM will sound great. In fact my second choice (for my style of music & my system) is the flat out best value Sonicap Gen I @ ~ $8. Price is not always the determinative factor.

IMHO, many similar choices must also be made with consideration of the capabilities of the speakers used. The sub-group buy idea just reduces the "gamble" aspect of buying higher priced components.
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Old 2nd June 2012, 03:52 PM   #718
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Another great cap for builders on a budget is the russian polystirene K71-4(film/foil).

Not as good as the Audyns but incredibly good for the price.

They're quite big though, they will not fit perfectly on board.
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Old 2nd June 2012, 04:37 PM   #719
weskoki is offline weskoki  Europe
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Clave how do they sound compared to the sonicap?
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Old 2nd June 2012, 05:23 PM   #720
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Clave how do they sound compared to the sonicap?
IMHO, better.

Much more clean, refined and detailed.

Sonicaps, thought, may be a bit more musical.
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