I make good use of the built-in EQ on my Clip and have an actual graphic equalizer inserted between my sources and headphone amplifier. And have since I became involved in this hobby (early 80s - still using the same equalizer!). EQ is essential to hearing music the way you want to hear it and having/using it would save a lot of Head-Fiers a lot of time, trouble and $. Does the recording engineer know what suits your ears? No. The headphone manufacturer? No. Anyone else that manufactured anything in your signal chain? No. Can it make a pair of crummy headphones sound good? Probably not. Can it make a pair of decent headphones sound great? You betcha. Constantly switching DACs, amps and headphones is a waste of resources. You can put together an inexpensive system that gets you 90% of the way there and make it nearly perfect (for YOUR ears) with an equalizer. So... get a decent system, make it sound the way you want with an equalizer and spend your online time researching music.