Top end copper foil caps from the likes of Duelund, Jupiter and others have never done anything but improve the sound in dozens of my speaker and electronics upgrades and modifications. Same with Path Audio resistors in my projects. While it is certainly possible that these parts would harm the sound in some piece of gear, I certainly have never heard it.
So I would like to know which hyper expensive caps sound so bright? Perhaps Mundorf Silver or SGO on the wrong tweeter and electronics combo. We listen to complete systems, not just caps. Perhaps Vcap Teflons? But not good film and foils I have used from Jupiter, Duelund, Auydn and Jantzen (Alumen Z).
It is amazing the level on sonic improvement that can be realized with smart cap, inductor and resistor upgrades in speakers. Most builders use run of the mill and “cheap” crossover parts in their $20,000 speakers. They do it to save money. That simple. Yes, one must take into account the sonic goal of the upgrade, the preferences of the listener and the other system components. Match all new parts within 1% and watch Parts that will change resistance. Smartly done crossover upgrades do wonders for reasonable cost and you can keep your speakers and system in tact without selling or buying gear.
