Hi, I'm looking for a completely neutral headphone amp for my smartphone which is very quiet. I was looking at the Topping NX1 which is super cheap, but after reading the entire thread I'm not sure it's really neutral. Then I thought about the FiiO E11 but I read this in the Topping thread...

Hi everyone,   I've been lurking here for a long time, learning a lot from the knowledgeable members here, as I got deeper and deeper into audiophilia. I never had anything to contribute, so I didn't register until now. I'd like to share with you a strange discovery that I made while...