I realize this is an old thread but I wanted to post some pics of the build and let people know the alpine subs work great. an old friend of mine that does custom high end home theater installs came over to evaluate my home theatre and was impressed with the subs. he said they sounded just as good as his high end install subs. I asked if he thought I should add anything and he said no he makes a living selling and installing audio and video equipment so I felt his opinion was honest.
I wont to take a moment to thank everyone who provided me with the knowledge to build my boxes and wanted to post some pics of the build to help anyone in the future. I see the drag and drop file upload but do not know how to do that.