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In the Forum: Melquiades Amplifier
In the Thread: Planning my DSET
Post Subject: Caps, caps, caps....Posted by Romy the Cat on: 6/18/2015
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 anthony wrote:
Thanks for your insight Romy.  I can see your point about not needing to worry too much in the DSET about coupling cap performance at higher frequencies but I would imagine that the crossover filter caps are quite import at those regions though.  Have you experimented with something other than the Electrocubes there?
   
In my view the Electrocubes do well across the board. When you are taking about “caps at higher frequencies”, then what do you mean? The line level, the speaker level, the line level between? Do not forget that a RL filter is always preferable over C filter.

 anthony wrote:
I ask this because the Electrocubes are not easy to get hold of and end up reasonably expensive by the time I purchase them in a quantity that they are willing to manufacture so I have looked around a little for alternatives.  Where you use film in the power supplies I am considering the Mundorf MCap Supreme film caps...they seem affordable and reasonably well regarded when used in power supplies.  Likewise I think that I will try them for the larger coupling caps.

I had a few Mundorf MCap but I can’t say anything concussive about them. The Electrocubes are not as expensive as you think. If you look their inventory then you can get them for a few bucks each. Alternativly you can look at eBay and you will always find someone has leftover and sell them very cheap, for $1 per 2uF/450V cap/ I have bought quite a lot of this way.

 anthony wrote:
Regarding the DSET crossover filter caps, I am thinking of using either Jupiter Copper Foil or V-Cap CuTF...they are both reasonably affordable in the small values, particularly the Jupiters.  DSET coupling caps I will probably try the Mundorf MCap Supreme film caps for a start and maybe even a small value Jupiter Copper Foil or V-Cap for the UpperBass coupling cap, just to see if there is any difference.

I will be building the fullrange first, so I might try a few different coupling caps in it if I get enough time with it.  I have a pair of Duelund Cast 630VDC 2.2uf sitting around here somewhere that I can try as the coupling cap plus I will be able to try the much less expensive Mundorf MCap Supreme mentioned above and maybe a Jupiter Copper Foil as well.  It will be interesting to see if any of those caps seem to work well in the fullrange Milq.  
 I do not know anything about them. Feel free to experiment. If you want, after you finish the amp, let me know your address and I send you a pair of Electrocubes 2uF/450V just for reference. Anyhow, there are tone of the caps out there you might find something good. Do not discard the vintage caps, some of them are very good. Also, be advised that most topologies of caps do need to be burn in in order to yield the best sound.

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