Looking for a DAC/amp with adjustable treble/bass

[peternguyen]

Hi all. My FiiO E17 stopped working on me so I am now considering upgrading. What I love about the E17 though was that it had an equalizer. I currently have a Beyerdynamic DT 880, and while I like the sound of these headphones, I find the bass underwhelming. Being able to use an equalizer on the E17 to increase the bass (and the treble a bit as well) made the sound much more enjoyable to me.
 
So I would like to know: what amps or DAC/amps are there that have an option to change the treble/bass, or at least a decent option to increase the base? I will be using this setup with my PC.

 

[peternguyen]

Sorry, I just realized that I should be posting this in the "Introductions, Help and Recommendations" section. I shall head over there.