I have a Kenwood subwoofer. Now, I know the dimensions of the box, the lenght of the port, that the driver is 8 inch, the amplifier put 100w RMS and that it appears to be tuned at around 35Hz or 40Hz (by the shape of the graph response). I know those are not at all the parameters to build a sonosub, but I wonder if you experienced guys can help me on this. I think that it could be possible to make an audible sonosub from all this. Worth it? is there any possibilites to have a lower extension? For example, what happens if I just give the drive and the port twice the volume?