I just reread this "Frequencies lower than 20 Hz are beyond our frequency hearing range: our low frequency response test - which starts as low as 10 Hz - should remain inaudible until it reaches 20 Hz. If you hear frequencies below 20 Hz, suspect this test to be corrupted by Harmonic Distortion generated from your speaker or subwoofer." Not really sure i understand the test then.Not sure how to distinguish what i should be hearing from distortion.

PeachTree 65se, PeachTree D5 and SVS SB1000 - Stereo
M80s, M22s, SVS PB3000