Capacitor


Dear friends I am interested to upgrade my caps in the tube preamp from Audio theta tin foil 3uf200VDC to Miflex1uf 240VDC copper foil what are your thoughts will reducing the value to 1uf affect the bass and frequency response or should I go with a higher value than 3uf  
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@grannyring 
In my shoes what would you choose for correct tone timber and transparency
the Odam or Duelund  
If money is no problem and they fit….the Duelund CAST Cu(Sn).  This is the best sounding capacitor ever produced in my opinion.  

 " the Duelund CAST Cu(Sn).  This is the best sounding capacitor ever produced in my opinion"

I'm not in a position to declare it the best sounding as I've not heard all upper tier competitors.  On the forums I see from time to time comments critical of the high cost of the Duelund CAST Copper foil capacitors. Some audio products are overpriced and overrated relative to  similar quality alternatives. 

In my humble opinion Duelund CAST is not overpriced.  In this instance you get what you pay for.  In fact I consider them a value choice because I believe that their performance level is that noteworthy.  As I've said before in regard to them, they are worth every single penny charged for them. A superb sounding product. If you can comfortably afford them, buy them. There will be no looking back. 
Charles 

I came so close to doing that. To be honest, it came down to a combination of they are so big it would mean outboarding the whole crossover, which in itself would be a huge project, and then there was the problem of even getting them. At the time when I was looking into it everything was backordered, and I just was not into waiting however many weeks or months. Okay yes there was the factor of spending more on the crossovers than the speakers. But having done this I know the crossovers ARE the speaker!  

When researching mine I tracked down a fellow in Kirkland who I believe had built some speakers using these caps. Was focused at the time on selecting mine. But now you make me curious to go back and see about maybe hearing them. And seeing them! These things are HUGE!!!
I can certainly see Duelund CAST capacitors approaching the prohibitive price range if a speaker crossover has numerous capacitors and  in the higher uf ranges. I was fortunate/lucky.  I had Only a single 5.5uf capacitor between the midrange drivers and tweeter.

Replacing the Solens with the Duelund CAST was immediately heard as an improvement ( Even though quite honestly the sound was very good with the stock Solens). Sound quality continued to improve as the CAST accumulated hours of break-in. But fresh out of the shipping box  it was an obvious sonic step upwards.
Charles