Well, if you look at your rooms dimensions you have a room mode at 282.50hz. Room modes are caused by the dimensions of ones room.
The reason I mention the 282.50 freq. mode is because that one is common to all three dimensions, so is stacked one upon another. There are many other room modes of course but none are stacked (in your room) and are evenly spaced out and fairly close together so as not to cause major problems.
If we look at a 10'x10'x10' rooms modes (cube) we would find many stacked modes which are common to all three dimensions:
56.50hz
113.00hz
169.50hz
226.00hz
282.50hz
339.00hz
395.50hz
452.00hz
508.50hz
and on and on, You can see why this room could cause problems and why people say the worst room would be a "cube room".
To answer your questions: It's not likely that large speakers have an advantage over smaller speakers plus subs.
It's more likely that any one person would only find a difference between the two because of poor speaker/sub integration caused by x-over settings and or placement issues.
The Velodyne DD-15 is a very good sub...are you having integration problems?
" I get nice full-range sound, and on pieces that are over-hot in the bass, I can just turn off the Velodyne for a while."
This statement does suggest a setup problem, you have the subs level set to high, or a placement issue, or both.
Dave
The reason I mention the 282.50 freq. mode is because that one is common to all three dimensions, so is stacked one upon another. There are many other room modes of course but none are stacked (in your room) and are evenly spaced out and fairly close together so as not to cause major problems.
If we look at a 10'x10'x10' rooms modes (cube) we would find many stacked modes which are common to all three dimensions:
56.50hz
113.00hz
169.50hz
226.00hz
282.50hz
339.00hz
395.50hz
452.00hz
508.50hz
and on and on, You can see why this room could cause problems and why people say the worst room would be a "cube room".
To answer your questions: It's not likely that large speakers have an advantage over smaller speakers plus subs.
It's more likely that any one person would only find a difference between the two because of poor speaker/sub integration caused by x-over settings and or placement issues.
The Velodyne DD-15 is a very good sub...are you having integration problems?
" I get nice full-range sound, and on pieces that are over-hot in the bass, I can just turn off the Velodyne for a while."
This statement does suggest a setup problem, you have the subs level set to high, or a placement issue, or both.
Dave