A couple of folks have indicated that you should just improve your speakers rather than add subwoofers.
The problem is: The physics of wave propogation at low frequencies (i.e. long wavelengths) suggest that these frequencies will usually remain smoothest (minimized cancellation) when originated at, or near, the wall(s). So, unless your upgraded speakers work best in-wall/onwall/against wall, this "solution" doesn't address the issue.
As to high-end 2 channel products failing to embrace .1 (or.2 or .3), that may indeed tell you something. Just something different than has been implied here. Subwoofers definitely do not hew to the "purist" 2 channel philosophy, but that doesn't mean that the choice of a subwoofer is "wrong". Maybe the philosophy needs to be re-thought.
Marty
PS - You could always forego the sub and smooth the bass region with Digital Room Correction, but I suspect that this is a greater transgression against the 2 channel orthodoxy than even the dreaded "s word".
The problem is: The physics of wave propogation at low frequencies (i.e. long wavelengths) suggest that these frequencies will usually remain smoothest (minimized cancellation) when originated at, or near, the wall(s). So, unless your upgraded speakers work best in-wall/onwall/against wall, this "solution" doesn't address the issue.
As to high-end 2 channel products failing to embrace .1 (or.2 or .3), that may indeed tell you something. Just something different than has been implied here. Subwoofers definitely do not hew to the "purist" 2 channel philosophy, but that doesn't mean that the choice of a subwoofer is "wrong". Maybe the philosophy needs to be re-thought.
Marty
PS - You could always forego the sub and smooth the bass region with Digital Room Correction, but I suspect that this is a greater transgression against the 2 channel orthodoxy than even the dreaded "s word".