Hi I'm building a ported box 200cm wide, 53.5cm deep and 58.5cm high out of 2.5cm mdf with 2x16cm ports and an RLP18" sub. Does anyone have any thoughts on the best orientation for the ports and sub? Eg. front firing sub with ports on either the same side or opposing sides or the sub and ports on either side of the box similar to a sonotube but laying down?