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A 100nF C0G/NPO is about 24 dollars a pop , example -> Kemet C0G CapI can't imagine what will be the price if at 2.2uF.
Quote from: BravoV on October 28, 2019, 03:38:15 amA 100nF C0G/NPO is about 24 dollars a pop , example -> Kemet C0G CapI can't imagine what will be the price if at 2.2uF. Huh? No they're not. I've used a bunch of 100nF NP0 caps when I need stability and it's not worth expending more design effort to use something cheaper. They're usually about a quarter, like GRM31C5C1E104JA01L at US$0.23 in quantity 100.It also looks like Kemet has recently introduced a new NP0 line that's about a factor of 5 cheaper, but they're not stocked at distributors yet. (Example part at Mouser.)
Replace with polymer caps. Only better, nothing worse, at least for audio DC blocking.