With the Sub, I didn't want to compromise leg room, so had to make use of the left hand corner of the passenger footwell. Marking out the area I could lose with masking tape:
and then covering the contours with packing tape...
for the messy, smelly, unpleasant bit: Making the back of the sub box with fibreglass matting, resin and hardener:
Once that had gone off, I used a series of cardboard templates to fabricate the front of the box:
I then attached a 6.5" MDF Spacer where I wanted the sub to be (ensuring there was enough clearance) and then stretched some cloth tightly over it and stapled it behind. Painted it with Fibre glass resin and added a very thin layer of glass matting. This gave me the shape without adding weight -
and then some P38/P40 for rigidity -
Once sanded, trimmed in carpet and a temporary grill fitted.
Sits securely in the corner. Whilst I'm more than happy with the sound, I'm not happy with the way it looks - it's not stealthy enough so will be re-making a box with the sub completely hidden, firing down from under the dash...