I have to take exception to the comment about Solens sounding good in a power supply. Solens always have a plastic, artificial sound no matter where they are used, at least to my ears.
For what it's worth, I sold my big Duelund CAST copper caps that I used in my speaker crossovers. Over time and once I got over the initial enthusiasm of trying something new and different, I realized their colorations bothered me to the point of interfering with my enjoyment of the music. Others may reach different conclusions, but the Duelunds are not the sound I am looking for. I had previously reached the same conclusion about Duelund CAST caps in electronics. I never did find a spot where the Duelunds were my preferred choice. In electronics I always come back to V-Caps especially the CuTF series.
For what it's worth, I sold my big Duelund CAST copper caps that I used in my speaker crossovers. Over time and once I got over the initial enthusiasm of trying something new and different, I realized their colorations bothered me to the point of interfering with my enjoyment of the music. Others may reach different conclusions, but the Duelunds are not the sound I am looking for. I had previously reached the same conclusion about Duelund CAST caps in electronics. I never did find a spot where the Duelunds were my preferred choice. In electronics I always come back to V-Caps especially the CuTF series.