Hi 2 all have a few questions: 1.)What does this look like, but you usually separate the sub around or at 70 heart upwards, or? 2.)Do you have to specify a frequency from which the woofer starts??So to say, the frequencies from 30 heart?? Because so 15 heart or so can not give again anyway!! 3.)Produces then a subwoofer actually a little kickbass or not at all!!! I heard that the sub probably should not produce a kickbass, since the kickbass ortb ar for the ear is !! Is that true? Mfg