Not the same application at all, so take it with a grain of salt, but within the week I'll have tried TFTF V-Cap, Mundorf Supreme Silver/Gold/Oil, and Duelund Tinned-Copper CAST as my preamp output coupler. So far I prefer the Mundorf. Burning in the Deulund as I type.
My experience is that everything sounds like something and the only way to know is to replace it. I have a Duelund preference (tinned-copper CAST in both my DAC and tweeter crossover), but like Tidal, I'm using ceramic drivers. I do believe that impressions are *highly* system dependent and things that may work beautifully in my system could sound horrible in others. That said, I do believe that drivers that tend toward analytic benefit from a high quality copper/film cap, and that Duelund will out perform its competitors in that role.
My experience is that everything sounds like something and the only way to know is to replace it. I have a Duelund preference (tinned-copper CAST in both my DAC and tweeter crossover), but like Tidal, I'm using ceramic drivers. I do believe that impressions are *highly* system dependent and things that may work beautifully in my system could sound horrible in others. That said, I do believe that drivers that tend toward analytic benefit from a high quality copper/film cap, and that Duelund will out perform its competitors in that role.