bluefirestarter

I installed these in the front of my 98 TA (w/monsoon) I hooked them up with the same hookups as the stock speakers. When I turn it up the highs lose quality dramatically.. My question is should I use the crossover boxes that came with Alpine speakers and plug it in the same line as the mids? If makes a difference I have a separate amp for my 6.5' kickers for the sail panels