Velodyne Digital DrivePLUSSeries - Manual (Page 13)

Illustrative of Technique
If you use the “Crawl Test” technique in your listening room, what you hear or the variations you see in the frequency response curves will be
different than those in this document. The evaluation we did was to illustrate the validity of the “Crawl Test” technique. What you hear and see
depends on the acoustical properties of your room.
Figure 1: Listening Room Layout & Evaluated Subwoofer Locations
Evaluation by Listening
In order to use the “Crawl Test” technique:
1. We put the subwoofer in the location of the main listening seat. To avoid having to lift the heavy subwoofer onto the seat of the chair,
we moved the chair back slightly and put the subwoofer on the floor where the chair normally is.
2. We played some music through the audio system. We choose a song that had somewhat repetitive and moderate amount of bass in it.
3. We reset the subwoofer volume to its factory setting.
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Subwoofer Placement Recommendations Guide APPENDIX A