Only if you're replacing cheap non-polarized electrolytics with poly or mylar. Yours do have NPEs that could stand replacing. There's little to no benefit in 'upgraded' polys. You can chalk up the miracle results claimed from using $200 caps to placebo effect. Your crossovers are quite rudimentary, and a better design might be an improvement, but crossover design is a field that requires years of experience to perfect.
3/8/14 at 3:17pm