They absolutely improve your preamp. I heard them both and the one with oil caps was more musical, transparent and has more details also.
Cary SLP-98 -- Do Oil Caps make a Difference?
I spoke to a well-known designer about the use of oil caps. His opinion was that they should be used in airplane electronics. Apparently, he doesn't have a high opinion of them. He spoke highly of polystyrene, however.
I remember some Cary SLP98 owners preferring some caps over others, and wonder which caps would provide the most high end extension and detail.
I remember some Cary SLP98 owners preferring some caps over others, and wonder which caps would provide the most high end extension and detail.