In a real sense, more bass and deeper bass are the same thing.
Bass rolls off for any given distortion spec and any given roll-off (deviation) at a given frequency. So...
If you want bass at -3db to a 90db reference level at X% THD, your current setup will roll off at (purely illustrative example) 35hz.
Because you have added more surface area to your woofer array, the woofer excursions will now be shorter at 35hz. Because THD increases with excursion, you have effectively cleaned up your bass at -3db at 35hz. It’s now less than X%.
You’ll now find that, for the same X% THD at -3db from your reference, you can crank the system an extra 3db. X% THD Bass will now be available at (say) 30hz -3db. You may have to adjust your main speakers at the x-over point to maintain flat response, but you will get “deeper bass” from the new set up, all else being held constant.
Bass rolls off for any given distortion spec and any given roll-off (deviation) at a given frequency. So...
If you want bass at -3db to a 90db reference level at X% THD, your current setup will roll off at (purely illustrative example) 35hz.
Because you have added more surface area to your woofer array, the woofer excursions will now be shorter at 35hz. Because THD increases with excursion, you have effectively cleaned up your bass at -3db at 35hz. It’s now less than X%.
You’ll now find that, for the same X% THD at -3db from your reference, you can crank the system an extra 3db. X% THD Bass will now be available at (say) 30hz -3db. You may have to adjust your main speakers at the x-over point to maintain flat response, but you will get “deeper bass” from the new set up, all else being held constant.