Drubin - You can set up the Veolodyne in each way you described. I go preamp -> sub -> amp -> speakers. I find the that the sonic gains of high-passing my speakers outweigh the loss of transparency by having the sub in the chain.
Though - if you dont want to mess with the "architecture," just use a preamp output, or run another set of speaker wires from your amp to the sub. You can still do all the room correction with the sub hooked up these ways.
for 17 x 23 x high ceiling, you would want the 15".
for 10 x 16, you want the DD10.
For sub sizes, room volume is everything. If changing it between rooms a lot is a must, go with the DD12.
Though - if you dont want to mess with the "architecture," just use a preamp output, or run another set of speaker wires from your amp to the sub. You can still do all the room correction with the sub hooked up these ways.
for 17 x 23 x high ceiling, you would want the 15".
for 10 x 16, you want the DD10.
For sub sizes, room volume is everything. If changing it between rooms a lot is a must, go with the DD12.