Amadeus Barrios

Hi guys, Bought a Alhambra 7PA spruce few months ago. The guitar has great volume but the 3rd(G) strings sounds a lot dead, so does the 2 first frets in general. I still have the original hard tension daddario strings in it. The Alhambra supporters sugested carbon strings but I've heard bad things about this kind of strings. Any possible help? Thanks a lot!