According to research, where are the best places for subwoofers and where are the best place for mains?
For example, when you have 4 subwoofers, the best locations for them are
1. Middle of each 4 walls
2. Corner of each 4 walls
3. 1/4 Corner of each 4 walls (front & rear walls)
And where do most people place their 2 mains? Probably the 1/4 corners of the front wall.
So if the subs are in the 1/4 corners of the front wall, placing the monitors atop them is like having 2 towers in the 1/4 corners of the front wall, which are also good locations for the subs.
If you have 4 subs in each of the four 1/4-corners, which are excellent locations for 4 subs, placing 4 monitors atop them would be like having 4 towers.
Where do most people place their towers and subwoofers?
Main Towers are usually in the front 2 corners or 1/4-corners.
Subs in the middle of the 4 walls? Probably not.