Velodyne Digital DrivePLUSSeries - Manual (Page 18)

The difference is hard to see at the above scale, so we have enlarged the curves below. The first image is the original curve, and the second
image the curve after moving the subwoofer one foot.
Difference between the curves and parameters:
• The low-pass crossover frequencies are the same, but the original crossover slope is 30 dB and the second slope is 24 dB.
• Note the level increase of up to 1 dB between 20 Hz and 50 Hz. This shows that even small placement changes of the subwoofer
can greatly improve the performance in the bass region.
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Subwoofer Placement Recommendations Guide APPENDIX A