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
I found that a dedicated headphone amp was a real eye opener using AKG 701s. This was a home based amp- OTL using 6080 NOS output tubes and one of my better 6SN7s as an input. It was not exactly cheap around $1500- But WOW what a difference. I refrain from suggesting the amp because the owner has been discredited, but his product if one of his good ones was amazing.
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.