Jim G wrote:
I don't know the crossover details either. I do remember assembling several brands of film capacitors @ 4.7uf. None actually measured 4.7uf however. There were easily heard differnces between the capacitors with slightly different values. Only 2 brands measured close enough to double blind test. I think they were approximately 4.4uf and within 1% of each other. No one was able to correctly identify the difference. I imagine few actually measure the competing capacitor brands they are comparing in this type of application to less than 1% and most of the differences heard are the varying values.
To be fair, the system was set up pretty hastily and not set up for optimum performance before starting. Hell, that could take weeks/months and require significant room treatment. I believe it may be possible there could be a difference between capacitors in spacial or atmospheric characteristics had the system (including the room) been capable of showing those characteristics. We really were only able to compare basic, but critical characteristics like toneality, and timbre.
And Jim pretty much said what I have been trying to say and failed. Or -- put another way -- "The devil is in the details!"