This design is for a small ported enclosure using the CSS FR125S
The FR125S takes over from its predecessor, the WR125S, by extending response to 20Khz and has impressive bass capability
due its XBL2 motor and 6mm one way XMAX.
The gross internal volume of the enclosure is 9 litres: (h)245 x (w)175 x (d)210 mm,
tuned to ~54Hz. Port size used: (d)40mm x (l)121mm.
External panel dimensions (using 18mm thick panels).