Adire Extremis 6.8 Questions

Ok so...

Highs: (2) Arum Cantus G2si  Ribbon Tweeter ($99.99/each)

High Amp: Undecided

Now Dyohn said something about kits matching the G2 with the Extremis? What's that mean? Any from here, what would be a best suggestion for a strong amp? I want something really clean.  Honestly NO clue what would do for the G2, since it is 6 ohm, and that is odd for me to figure out. (Would love help in learning how to get an idea of what would be good.) As for the Extremis, I was told before it depends on the enclosure. I'm assuming the enclosure is going to be sealed. I mean this ultimately will be determined by the positioning. Any suggestions? Kick panel space is fairly limited but I guess possible. Essentially, I've got the components picked out, what next?

Recommended sealed enclosure for a single Extremis is 9.5 litres (0.33 cuft.)  You can mount them IB in your doors if you want and they should work fine (as long as you have the mounting depth.)  They really only need around 50 watts.  As far as the tweeters, you will need a properly designed passive crossover which will take their impedance into consideration, unless you plan to go active.  Then just use Ohm's Law to calculate the effective output of your amp channels into their load.  Most tweeters require less than 20 watts.

The Belle amp you have in your sig line would be a fine amplifier for this setup, and you'd have your sub channel too.  Realize if you bi-amp with active crossovers, your 4-channels will be needed for the front set, but you probably won't need or want rear speakers with this system so it shouldn't matter.