I recently tried a pair of old Dubilier Type 418 1uF 250V cap on front of my Circlophone amplifier as coupling cap and I amazed how did they sound different than all those i tried before. It has a small value (1uF) and lighter in weight compared its size. I couldn't find any info on net. Maybe someone can comment about them (their material and other similar capacitors etc.).
Thanks.
Thanks.