Registered User
Join date: Dec 2010
742 IQ
I have an ESP LTD M-300FM

basically the action on the first 12 frets is a bit too low, yet 12-24 frets are a little big to high.

I tried adjusting the posts, didn't help.

What can I do?
Registered User
Join date: Jun 2009
72 IQ
I'm not great on the subject but it sounds like your neck relief needs adjusting (via the truss-rod)