Has anyone ever replaced the soldered op-amp inside to a discrete one? I think Burson and Dexa are the biggest discrete op-amp manufactures, I once changed my Zero Dac op-amps to discrete one's and it made a huge difference. Any doubt's, is the op-amp soldered for a reason?   Demonstrative...

I think it's the deal with build quality/-materials, that let's people think that these are more mid-fi headphones. Now i don't mean they have bad build quaility or anything, they just tend to be a bit "plasticy" compared to similary priced headphones. at least in my opinion.   I have been...

So, I bought the OPA637 Zero Dac couple months ago. I would have opted for the cheaper versions, becouse I was gonna upgrade the op-amps anyway. But since the OPA637 was the only one that the Finnish importer had, I bought it.   My initial toughts weren't that great. Before the Zero Dac I...