www.velodyne.comDigital Drive PLUS Series User’s Manual - 23However, you can make the correcting filters more aggressive or adjust it in other ways to match your listeningpreferences. Auto-eQ PlUS serves as an excellent starting point for those of you who want to manually adjustparameters to modify the frequency response profile and the parametric filter frequencies, bandwidths andlevels. It’s your subwoofer, not ours any more. you have the freedom to make it sound the way you want it to.Optimize for Subwoofer Placementwhen you unpack the subwoofer, you place it in the room according to the information in the general sectionand optionally the ”crawl Test” section in the Subwoofer Placement Recommendations Guide. The “crawl Test”can help you to improve the bass reproduction quality by simulating moving the subwoofer around the roomusing acoustic reciprocity to find the placement that gives you the sound you like best. With the ”Crawl Test”you have to move around the room. moving yourself around is easier than moving a heavy subwoofer around.NOTE: If you want to use the ”crawl Test”, do so before performing any of the optimization methods.Room placement is one step to equalize the subwoofer(s) to the room. Subwoofers operate at extremely lowfrequencies, which are primarily omni-directional. Hence; you can’t usually tell where the bass is coming from.Finding the best location for your subwoofer in your room is a trial and-error process.with the ”crawl Test” Technique:• You find the best tradeoff between appearance of the subwoofer in the room and the subwoofer soundquality.• You optimize the subwoofer placement when the room is in the configuration that it is in when you typicallylisten, such as doors opened or closed, curtains open or closed, etc. Additionally, you can learn what effectthe configuration has on bass quality, by changing it and listening or measuring.• You can rely just on what you hear to pick a location or you can use the microphone and Auto-EQPlUS sweeptone with the subwoofer setto manual eQ to look at the frequency response graphs to see which locationis best.NOTE: your satellite speakers also contribute to how your audio system sounds. If moving your satellites is anoption, you might likewise place them through experimentation and measurement.