Just to provide a point of view (sort of a reality check): HD650 on Stratus is still HD650 IMHO and will be on Starlett too. If you dont admire the headphone on something like Valhalla 2 / Project Sunrise, I highly doubt it would change much with Stratus and therefore the same most probably applies to Starlett. Dont overblow effect of amplifiers to headphones. I unfortunately see this happening all the time which only causes unrealistic expectations to others. It happened here too (see above from @ColtMrFire ) ... ... HD650 cannot have a deep, hardhitting bass on any amp on the planet. Take a look at its FR and distortion graphs to understand why. It gets a bit better with higher quality amps but still cant touch planar magnetics or even something like Auteur in this regard. HD650 is cool but wont magically transform into something else just because you plug it into something else.