I would go with Adire's 95 liter SBB4 Shiva alignment with a Rythmik 350 amp. Shiva mkIV $115 Rythmik 350 $155 4" port $21 http://www.acoustic-visions.com/
I would say the average speaker has Frequency response +/- 3db impedance 8 ohms Efficiency 87db 1w/1m cone woofers? polypropylene Tweeters? soft dome None of these specs can really tell you how a speaker will sound.
They have different alignments for different needs. If you read the white papers you'll see the EBS (extended bass shelf) is recommended for flat in room response.
I think the guys at Adire can explain it better then me.
You'll have to check out the PDF to see the chart. http://www.adireaudio.com/Files/Vent...plications.PDF
Thats my point. Unless you have a room treated to the max, you will not get flat bass without EQ. An anechoicly flat sub will actually have worse in room response then a sub with a shelved response (room gain).
You could bring everything down to 80 db and have very flat response, though your sub will seem less powerful. Where are all the Hsu proponents who always claim Hsu subs to have the flattest response? :crazy: I really hope this shows you how asinine those claims have been.
I think going with micro speakers is a bit extreme for your situation, and you'll probably regret it when you have to live with the sound quality. An option that will give you good sound quality, out of the way placement, and not too much trouble when moving is on-walls. Check out the ACI...
I don't know what your definition of small is, but in my view a 36" diameter tube is HUGE. A Tumult with a pair of Stryke 18" PRs will give you all the output and extension you need in a much smaller box (think 25" cube).
A pair of line array subs using 4 Dayton 8" DVC's in each sub should do the trick. They're going for $20 each right now. http://www.partsexpress.com/pe/showd...D=166913&DID=7
The biggest problem I see with using carbon fiber is trying to cure it in your garage or wood shop, and buying the right equipment to do the job ($$$).
There really isnt enough info posted (like the actual driver being used) to be definitive, but I'm guessing it's not a boomy design. Another factor to consider is how your room's effecting the bass. Most rooms give you a peak around 50 hz.