ifi dac v2

I have been using my HD559s for about 3 years, and I love these, the one thing which I like very much about these are the punchy/muddy bass but when I read the reviews most of them didn't like the bass as it was too muddy. So I am looking to upgrade these, what i want in my next pair is a wider...

Hello there, I am probably going to get a lot of hate for this, but here it goes. I love the way the ifi dac v2 truebass button works, it just doesn't have enough power, i was using it on a pair of HD800s. Since then, i have bought the topping a90 d90 combo. What i want to do is somehow get that...