How low does the AdireRAVA sub go? On their site this info isn't there as straight forward as like how the HSU site says "25 Hz to 100 Hz +/- 2dB freq response". There is a freq response graph on the Adire site but I don't know how to interpret it. Even at 20Hz the dB level is as high 78, does it mean that it can be considered to go as low as 20Hz? Or should only a range of 4-6 dB from the max (87dB) be considered to see how low it can go?