Hey gang, Long time listener, first time caller. I just got my new Avatar 4X10 last week and it sounds great for the price! Very clear and punchy. I took some measurements on it and plugged the numbers into WinISD. It looks like the internal volume is somewhere between 2.8 and 3 cubic feet, and there are 2 ports, each 3.75" with basically no length. According to WinISD this would put the tuned frequency at about 80 Hz. If I increased the length of the ports to 5", this would lower the tuned frequency to around 54 Hz. My questions are: How would this affect the overall sound of the cab? If I did this, is there an increased risk of damaging the speakers?