I used to have the FSX series in my front doors and some coexials in the back and they did well but I upgraded all 4 to the NPX series and the sound clarity after a re tune was absolutely amazing. The old speakers had a crackle at higher volumes but the new ones barely crackle and there paired with the frequency bass blockers as well only in the front with my tweeters. Over all a great purchase and would recommend the NPX series. The low profile and lighter speaker is vey nice as well. Don’t let that fool u because it’s a smaller magnet or whatever
