I guess I did forget to put that the 4in woofer I have is from 65 Hz - 23 kHz, -10 dB. The 5in is from 50 Hz - 23 kHz, -10 dB.

Basicly will I hear a difference from the 4in and 5in? Both have same power handling btw just one has a bigger woofer that's all. I don't have any specs for the SPL. I just needed to know that in general can you hear the difference on the lows from 65hz to 50hz that's all.