Bumping the thread for some good news.
The first coaxial kit is complete and it sounds great. MTG90 and I messed with some expensive coaxials, cheaper ones, and different compression drivers. The end design might surprise you. It uses the 10" Eminence and works well in a very small sealed box, small ported box, or even a ported tower that you could nearly call full range. We've built a couple boxes and put a lot of power through each one and they all passed the test. For the past couple days I've been running it full range in a short ported tower and it's pretty crazy how much volume even a single one of these can put out. And it sounds clean and smooth doing it. Easily plays at high enough volumes to be used for main speakers in a large home theater, let alone surrounds.
Efficiency is in the mid 90's.
I don't know exactly what the flat pack cabinet will cost yet, but I do believe the entire kit should come in around $155........with the smaller flat pack!!
That doesn't count shipping though. I'm hoping to get everything together and try to figure in "free shipping" for around $170, $175 or so with Paypal fees, packaging material, etc. I'm not sure how much the package will weigh with the flat pack yet, but it should be around that price.