Good article on capacitor comparison and listening tests. http://www.humblehomemadehifi.com/Cap.html
My speaker manufacture uses extremely tight tolerances so as Erik mentioned above just the differences in tolerances can shift the cutoff frequency substantially. One of the reasons I chose the capacitor I did was tight 1% tolerance along with excellent sound for expense ratio. I am a Mundorf Supreme Silver Oil guy myself for preamps and Supreme in speakers. Paper in oil capacitors typically have 10 to 20% tolerances. So do pay attention to attempting to get a reasonably tight tolerance match of the capacitor you are replacing. I have had good experience with Sonic Craft as a seller, large inventory, good prices, fast shipping and they do capacitor matching for a minimal fee.
Warning: Do not measure capacitance value when tweeter is still in circuit. To duplicate its value precisely, I measured the capacitance value before I ordered replacement. Since the capacitance meter puts a signal out to measure capacitance value it can fry you tweeters! Don’t be a dummy like me, remove the capacitor from the circuit. My mistake cost me a few hundred bucks; however, I was able to replace the ribbons later and now have a spare set of tweeters. I am good with my mistake now, but when I looked at my tweeters and saw those shredded tweeters I was kicking myself.
My speaker manufacture uses extremely tight tolerances so as Erik mentioned above just the differences in tolerances can shift the cutoff frequency substantially. One of the reasons I chose the capacitor I did was tight 1% tolerance along with excellent sound for expense ratio. I am a Mundorf Supreme Silver Oil guy myself for preamps and Supreme in speakers. Paper in oil capacitors typically have 10 to 20% tolerances. So do pay attention to attempting to get a reasonably tight tolerance match of the capacitor you are replacing. I have had good experience with Sonic Craft as a seller, large inventory, good prices, fast shipping and they do capacitor matching for a minimal fee.
Warning: Do not measure capacitance value when tweeter is still in circuit. To duplicate its value precisely, I measured the capacitance value before I ordered replacement. Since the capacitance meter puts a signal out to measure capacitance value it can fry you tweeters! Don’t be a dummy like me, remove the capacitor from the circuit. My mistake cost me a few hundred bucks; however, I was able to replace the ribbons later and now have a spare set of tweeters. I am good with my mistake now, but when I looked at my tweeters and saw those shredded tweeters I was kicking myself.