Would I benefit from a headphone amp?


I have a TOTL Sony D6C cassette walkman and Grado 325 Headphones. Could a headphone amp worthwhile enhance this combo? It sounds wonderful as is but Im greedy for more. Is the headphone amp in the Sony of a good quality that I would only hear a marginal difference? Also there is one output and input. Can I use a split cable and get stereo sound? Thanks
128x128blueranger
Cassette walkman? Is this a serious post? I was pretty sure they don't even make cassettes anymore.
Beats digital. Cassettes recorded on a well set up TOTL deck with a good well set up TT sound incredible on the Sony pro walkman.
WM-D6C has a decent headphone out and can drive almost all headphones.

I use a Yamamoto HA-02 with my D6C. Make sure you use the line out instead of the headphone output.

I find the HA-02 to be superior with my headphones than the headphone out of the WM-D6C.