Howdy! Sorry I did not get back to you sooner. It is kind of hard describe their signature because nothing really stands out - they are very neutral. I know that may sound boring, but they are anything but. I am a bass head and enjoy exaggerated, but tight bass and I feel these are a bit low frequency shy, but that is just me. After I've had them on my head for a while, my ears adjust and the bass is fine. The treble is clean and airy and the midrange is not pronounced - like I said, neutral. For me, they are good, casual headphones.
TL/DR: Great sounding headphones that may be best suited for background music whilst doing something else.