I like it.
I'd say give the headphones a good sharpen and the same with the "H!" then get rid of the yellow blur from the cords and you'll have a sweet sig.
You drew those headphones from scratch? Very detailed.. I don't like the blurriness either..or the color yellow, but the sig itself is neat. I would have added more color outlines to the H!.
Yup. I can't work on this anymore, though. I had to reformat my computer due to my friends idiocy, so the PSD went along with the rest of my stuff.
But thank you for the comments.