Dont let anyone tell you that wires, capacitors, resistors, pots, etc dont make any difference. I bought some Jantzen Superior Z caps for my speakers years ago. I moved on from them several times. Migrating to oils because I felt I needed more of an 'analog' sound. Trying to tame the digititus. I came to realize that I was barking up the wrong tree. What was needed was a cable and speaker wire mod, and that the Jantzen was in fact just what I needed in the circuit. I'm glad I kept them. I have them bypassed with Mundorf SIO's and they sound much tighter and cleaner than the AmpOhm PIO's that I had bypassed with SIO's. Who would have thought. I also tried the Obligatto's with the Mundorfs and they didnt sound good. I thought the Obilgatto's were 'better' than the Jantzen's. Just goes to show you. If you bought something, it was for a reason. Dont throw it out! I know the Superior Z's reviewed well. I dont always trust the reivews though. Now I can hear the qualities that the reviewers mention. This hobby plays with my head!