Where did you put the XD 600/1 for power for the sub? Just interested in how you finished the project (if finished yet that is). Otherwise this is definitely something I'd like to do sometime! Looks great!
'11 BMW E92 ///M3 - ZCP and DCT
'13 Toyota Tundra - 4x4 Platinum CrewMax, 5.7l iForce V8