Dear 240zracer: The Eldartford suggestion: run the subwoofer in mono way is really the best one because you don't have to add any other " stage " ( rumble filter ) to the signal.
Like Eldartford already posted the pumping in your woofer cones are adding intermodulation distortion and certainly makes a degradation to the signal reproduction.
Regards and enjoy the music.
Raul.
Like Eldartford already posted the pumping in your woofer cones are adding intermodulation distortion and certainly makes a degradation to the signal reproduction.
Regards and enjoy the music.
Raul.