Nov 11, 2011 · PS500 vs HD650: HD650 darker, more laid back, more bass quantity stronger bass slam and impact. PS500 more forward, more intimate. Technicalities wise, once you can get over the dark Sennheiser sound, the HD650 is more resolving and has a more three dimensional soundstage with proper imaging and depth. Agree with Mulveling's comparison and assessment on HD600 vs. HD650. I may also add that the HD650 is harmonically richer, and more body to the sound. The HD600 is more neutral. I prefer the HD600 listening to analog front end, and HD650 with digital front end. Nov 23, 2011 · You can't really go wrong with the HD650, it is a very well rounded headphone. I've run a side by side comparison between AKG 701, Grado RS1 and HD650 and after that chose to purchase the HD600 (I got a good deal, so it made sense over the HD650) Wouldn't touch the 701s, they have no bass. What is the difference between Grado RS1e and Grado RS2e? Find out which is better and their overall performance in the headphones ranking.