What you want to do is set up a distributed node subwoofer system using multiple subwoofers in different locations in the room this will smooth out bass nodes and peaks. You can use any brand to do so no real need to match manufacturers just frequency range phase and match levels. http://www.gedlee.com/Papers/multiple%20subs.pdf
Stereo Subwoofer Pairing
Does it matter if stereo subwoofers (one dedicated for each channel) are the same age or will it sound fine to use one subwoofer that is new with a used one (both subwoofers are the same model)?
Will it just take time for the new subwoofer to break in to match the used one or will they never sound close to each other?
Will it just take time for the new subwoofer to break in to match the used one or will they never sound close to each other?