a good say to check on this fast or slow subs (response) is to shut down the amps and leave only the sub on while music is playing.
i find it's not very "musical".
when i hear very low freq. sounds that seem to be directional, this is caused, i suspect, by harmonics of the instrument playing those sounds, higher than 80 Hz.

Last edited by J. B.; 01/16/12 05:54 PM.