FullRange 2 way Tang Band 1808 and LB12 suggestion

I have a Pair of TB 1808 8" FR drivers and a pair 12" Eminence Lab12 driver Looking for suggestion to make system thats 2.2 so FR will be seperate box and subs will be seperate box Also I have a Pair of peerless STW 350 15" sub drivers so incase you feel lab cannot do and STW can I have no issue

have Hypex amps and miniDSP 2x4HD no skils to calculate box or make passive crossover.
Room Size is 15ft wide 28ft depth and 10ft height
I listen to various music like techno electronic and pop also I like loud.
regards
anand
 
or woofer and satellites, assuming a woof is under each of the full range drivers.

I think a subwoofer (in general) blends better when it is between the 2 front speakers.

That is a big room, and you like techno.

200hz (or higher) crossed 18db (or steeper) should allow some pretty decent volume levels.
Lab 12 kinda dips past 200hz anyway.
Fs=22hz, qts = .38, Vas 4.42ft3
That will go deep, but 30hz excursion may be too much.

I think diysoundgroup has a 12" flat pack that is near 4ft3 tuned to around 22hz for near $200.

Passive crossover will be tricky as you may need to pad down the 1808, but that gives you room for baffle step.
 
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when the frequency is larger than the baffle, some of the sound goes around the box, not as much is going to you.

Do you have an equalizer ?

Without it, it would be a very wide box, maybe 23" wide...................
that would be its (maybe) 3db down to cross to the lab 12.