the line driver would offer you some what of a better s/q but probly not noticable if your amp is a class D if it A or A/B most likely they will get louder and you could turn your gain down so there is less distortion when you turn them up. I have an audiobahn line driver pushing 2 class D's and for that its noticable because of the split of power between the 2 that and my head unit is cheap. well hope this helps