The post says bass E ... If they are listening to bass guitar playing a low E then what they are localizing is the overtones at much higher frequency. If they are playing a straight 41 Hz tone from a tone generator, then they may be localizing based on harmonics (from distortion produced by the woofer driver). I highly doubt that anyone can localize a pure 41 Hz tone - I could be wrong, but the wavelength is too long to localize to any degree in a typi Nice subs!!! These should sound great. Good price too!