Nice a powerful with good bass, very clear. Probably favoring the lower range more but I don't recall it being boomy. The first headphones I was really satisfied with. I had them for a few years but accidentally snapped off one of the ear pieces. I payed about $80 at the time.
Found them at my local Borders bookstore. I was on a budget but wanted something decent. I didn't expect much as far as sound quality but was pleasantly surprised. Excellent bass for it's size, very comfortable, overall a more powerful (dynamic) and clear sound than I expected for the price (around $40 I think).
The first headphones that made me go "wow"! Amazingly clean and dynamic sound much better than anything I heard before. Clean and well defined bass that made other headphones sound fuzzy and bloated. (~ $60)
Much like the SR60 only better. If my first impression of the SR60 was "Wow, these are really good!" Than my first impression of the SR80 was more like "Wow, these are amazing!".(~ $80)
My first Audio-Technica headphones. I was on a budget and looking for something better than the Koss (UR-18 or UR-19 I think) I had which are in the running for the worst sounding headphones I've ever owned. The Audio-Techica's retail for about $40 but you can find them for half that price. I didn't expect much for the price but was again pleasantly surprised as I was with the PortaPro's. Nothing amazing, but very good for the price range. Gave me just a hint of a reminder of the Grados sound, not nearly in the same league, but still a reminder. Very comfortable with overall good construction. One of the best parts of this headphone; I have a bad habit of stuffing headphones into an overstuffed backpack, it's easy for cheaper plastic headphones to break which happens too often. These headphones have a break-apart design which has prevented them from actually breaking. I can just click them back together. Very awesome. An excellent value for around $20 that most stores sell them at.