10" woofer(x2) or 10" subwoofer

Assuming I'm crossing over to the mids between 100Hz & 150Hz and using a plate amp to drive each channel what would be the (dis)advantages of using two 10" woofers http://www.parts-express.com/pdf/295-357s.pdf instead of one subwoofer http://www.parts-express.com/pdf/295-460s.pdf? Cabinet size is a non issue. I'm currently running the RS265HF, but I've been wondering if there might be a sound quality advantage to running two of the RS270s since they've got much lower Mms. Or would that potential advantage only be applicable if I were to run the drivers higher up into the midrange?
 
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And the reason I"m inquiring about this is my hunch that the 2 woofer drivers would sound more dynamic and lower distortion in the middle and upper regions of its passband, while coming out the same as the sub driver at the bottom.
I doubt the lightweight aluminum cones would have lower distortion than the sub.
The pair being more efficient, it is possible they might not suffer as much from dynamic compression if you tend to play compressed musical styles quite loud, but with their power rating at 100 watts compared to 350, that is only a maybe.
 
Assuming I'm crossing over to the mids between 100Hz & 150Hz and using a plate amp to drive each channel what would be the (dis)advantages of using two 10" woofers http://www.parts-express.com/pdf/295-357s.pdf instead of one subwoofer http://www.parts-express.com/pdf/295-460s.pdf? Cabinet size is a non issue. I'm currently running the RS265HF, but I've been wondering if there might be a sound quality advantage to running two of the RS270s since they've got much lower Mms. Or would that potential advantage only be applicable if I were to run the drivers higher up into the midrange?
Here are some thoughts about using dual 10" drivers:
  • Having two 10" drivers (positioned one above the other) would help smooth out the "floor bounce" effect of the speaker. -advantage
  • The two woofers you listed, the RS270, need to be in a really large box whether vented or sealed. This was mentioned above. -disadvantage (maybe not since you say cabinet size is not an issue)
  • When you put woofers in a large box, distortion caused by the non-linearity of the air-spring is reduced, and there is more "room" to add stuffing/damping material that will adsorb the backwave from the driver. -advantage
  • Both drivers have low distortion motors. -Tie
  • The two woofers have lower Le (inductive component of voice coil) giving better performance at higher frequencies. You might think about moving up the crossover point to the mid(s) to 250-300Hz, because these drivers will work well there. -advantage

Mms is not at all a factor in the equation.

It looks like the 2 driver combo wins.

-Charlie