Here is the theoretical normalized frequency response from the box. The 3dB points are 57Hz and 505Hz. The spike at 2kHz is a vent resonance peak. The BassBox program takes many parameters into consideration and helps a lot to get the exact chamber volumes and vent tunings. The next pair of screenshots are from Google Sketch-up. You can click to enlarge. There is no way I could have crammed the devices in there without this model. This is a shot of the wired crossover. The box is ready to be closed.