There is quite a large range for the SC10 to work in 13-25L. I started out not removing the 8" but after some approximate calculations it only came out at 15L which would have worked but I wanted bigger. Dan was the guy who told me to take out the 8" mounting plate. I thought it was part of the chassis but it was just held in by 5 screws. It's a bit of a PITA to get all the trim off but made a heap of difference in size and gives the box some positive locking options.
Here are the Sub specs:
http://www.morelhifi.com/support/pdf/mo ... Series.pdfThese speakers are great and I would recommend them to anyone. I have the same sub in my MX5 but this one is the 2 ohm version. HDP5 @ 2 ohms puts out 550 watts, should be fine but we will know soon. I'm running a Audison Lrx5.1k In the Mazda so the 4 ohm is fine.
All up the box took me about 25 hours over about a week. The downside is there is friggin dust all over the place from sanding the bog and the glass. It was however, really satisfying to finish and a fair bit of fun in the making.
Richard.