ghulamr,
Are you ruling out a Swarm type bass system?
If it's too expensive for you, I understand. Prior to the Swarm, I tried multiple brands and models of single and dual sub configurations and positions in my room ( Velodyne, REL, JL, Hsu, Klipsch, Polk, B&W, Theile and a few others) and none performed as well as the Swarm.
My main speakers and center ch are Magnepans, which are notoriously difficult to integrate subs with. The Swarm system was the only system I tried that blended seamlessly with the Magnepans for music and still delivered the bass impact I wanted for ht. It truly is a state of the art bass system.
I'm unaware of any single or dual sub setup using conventional subs, at any size or price, that can match the performance of the 4 moderately sized Swarm subs properly positioned. I do believe, though, that utilizing 4 of almost any top line conventional subs properly positioned in a distributed bass array system would likely outperform the Swarm subs. I've never personally tried this but I know it would cost about 4x or more than the $3K price of the Swarm and probably only deliver marginal bass response improvements.
The 4 sub distributed bass array system is the result of years of research on in-room bass response conducted mainly by 2 PHDs in acoustical engineering, Dr. Earl Geddes and Dr. Floyd OToole. Google their names if you'd like to learn more about their experiments, conclusions and White Papers.
My intention is to share my many years of experience and knowledge trying to achieve the same bass response it seems you're now searching for. I have no financial or other interests with Audio Kinesis/Swarm other than purchasing their bass system and knowing how well it works in my system.
My opinion is that the single 15 x18 x20 sub that you are looking and hoping for does not exist. Sorry, but it's as simple as that.
The $3K Swarm system is the least expensive solution I'm aware of that will provide you with the bass performance you described.
Tim
Are you ruling out a Swarm type bass system?
If it's too expensive for you, I understand. Prior to the Swarm, I tried multiple brands and models of single and dual sub configurations and positions in my room ( Velodyne, REL, JL, Hsu, Klipsch, Polk, B&W, Theile and a few others) and none performed as well as the Swarm.
My main speakers and center ch are Magnepans, which are notoriously difficult to integrate subs with. The Swarm system was the only system I tried that blended seamlessly with the Magnepans for music and still delivered the bass impact I wanted for ht. It truly is a state of the art bass system.
I'm unaware of any single or dual sub setup using conventional subs, at any size or price, that can match the performance of the 4 moderately sized Swarm subs properly positioned. I do believe, though, that utilizing 4 of almost any top line conventional subs properly positioned in a distributed bass array system would likely outperform the Swarm subs. I've never personally tried this but I know it would cost about 4x or more than the $3K price of the Swarm and probably only deliver marginal bass response improvements.
The 4 sub distributed bass array system is the result of years of research on in-room bass response conducted mainly by 2 PHDs in acoustical engineering, Dr. Earl Geddes and Dr. Floyd OToole. Google their names if you'd like to learn more about their experiments, conclusions and White Papers.
My intention is to share my many years of experience and knowledge trying to achieve the same bass response it seems you're now searching for. I have no financial or other interests with Audio Kinesis/Swarm other than purchasing their bass system and knowing how well it works in my system.
My opinion is that the single 15 x18 x20 sub that you are looking and hoping for does not exist. Sorry, but it's as simple as that.
The $3K Swarm system is the least expensive solution I'm aware of that will provide you with the bass performance you described.
Tim