This was my first Audio Technica headphone and I had never seen it before but I took a chance and I'm so glad I did because it's become one of my favorite headphones I've had.
They have a very detailed sound with great clarity but they can sound a touch bright at times but I haven't experienced any harshness from it. The bass is very clean with good definition and a nice bit of punch as well. Mids come through more than you'd think with a somewhat V-shaped headphone and they are very clear. The highs have a lot of sparkle but to me never sound harsh or overbearing. Soundstage and imaging are both quite good for a closed-back headphone with a nice 3D presentation.
I really enjoy this headphone a lot and anyone that likes a very detailed clear headphone will like the AP2000ti.