Do dedicates headphone amplifiers provide any considerable befits as compared to just sticking your headphones in the stereo amplifier jack. When using headphones what's the difference in using a headphone amp compared to a stereo amp? Thanks

So ive got a Grado SR 125i and ive done the hole punch mod. added 3 holes and feel like ive got some real good base nearly perfect amount. I also play the grados through a JDS labs C421 headphone amp. The base booste makes it sound real nice and the amp does definitely make a difference in the...