Velodyne DD-10+ User Manual

Also see for DD-18+: User manual Quick guide Manual Quick start guide Guide d'installation rapide

Velodyne DD-10+ User Manual Manual pdf 31 page image

www.velodyne.comDigital Drive PLUS Series User’s Manual - 25OPTIMIZATION PARAMETERS EQThe following table describes the subwoofer EQ parameters that are either automatically configured with Auto-eQPlUS and/or Self-eQ. All of these parameters can be manually customized by you using the manual-eQmethod.EQ Parameter Set withAuto-EQPLUSSet with Self-EQDescriptionlow PasscrossoverFrequency andSlopeyes no The upper limit of your subwoofer’s frequency response.The crossover frequency can be set to increments of 1Hz, between 40 Hz and 199 Hz or it can be disabled (— orOFF). The crossover slope can be set to 6, 12, 18, 24, 30 or36 dB/octave.Typically, these parameters are the same for all the presetshowever you can choose to vary the values in the differentpresets.For Self-EQ the crossover frequency is set to 160 Hz with aslope of 24 dB.The subwoofer crossover frequency can also be changedby the subwoofer’s front panel control. Please note that thistype of change is temporary until you change it and save itto the DD+ using either the TV or windows interface.Subsonic FilterFrequency andSlopeno no Sets your subwoofer’s lowest frequency limit in incrementsof 1 Hz between 15 Hz and 35 Hz. The subsonic filter slopecan be set to 6, 12, 18 or 24 dB/octave.Usually, the subsonic filter doesn’t need to be changedfrom its default of 15 Hz with a steep roll off of 24 dB. Thedefault settings provide the maximum protection at thewidest bandwidth. Increasing the crossover frequencyprotects the subwoofer more; lowering the slope protects itless.If your subwoofer isn’t adequately protected at very lowfrequencies, you can blow up the subwoofer’s amplifier orcause other damage that requires subwoofer replacement,which are very expensive repairs.It is easier to overdrive the subwoofer at these lowfrequencies because you can’t hear these frequencies.Warped vinyl records can have unexpected output at verylow frequencies and damage the subwoofer. Some cD’sare made without filtering this part of the signal out.