I have a question about the audiophile capacitor replacement. In normal production boards, signal coupling capacitor normally using polar electrolytic capacitors. In some higher grade models, bi-polar electrolytic capacitors will be introduced. Some people will upgrade it will audio grade capacitors such as oil caps, polypropylene caps. In my audio device, the coupling caps are 100uF polar electrolytic caps. I am looking for Jensen oil caps and it will be very expensive and the size is very big. Someone suggests me I can replace with 20uF oil caps instead of huge big one. If it is right, is there any rule of thumb to do the exchange calculation or any theory behind the idea. It seems the capacitor values will be 5 times lower than the original value and I am worry about the filter DC function. Thanks a lot for any input for the information.