Velodyne Digital DrivePLUSSeries - Manual (Page 31)

Adjust the subsonic filter if your media requires it or if peaks
and valleys exist at the very lowest frequencies that you
can’t correct using room placement of the subwoofer and/or
parametric filter adjustment. Use of a lower slope at the
lowest crossover frequency should be done only
intermittently to extend the life of your Digital Drive PLUS
subwoofer. The proper setting for these parameters is
dependent on playback level and size of the room.
Experiment carefully and choose the correct setting
for your usage.
Typically, during Manual-EQ these parameters are the same
for all the presets. However if your media is so demanding
and varied for different listening modes, you might want to
set these filters individually for each preset.
Phase Yes No Adjust the phase delay of your subwoofer’s output signal
from 0° to 180° in 15° increments to allow a better blend to
the satellites at crossover and account for distance or delay
differences. During Manual-EQ, we recommend you adjust
the polarity before adjusting the phase.
Polarity No No Your subwoofer’s polarity can be either positive (+) or
(+/-) negative (-). Toggling between these settings reverses the
audio signal’s phase 180 degrees. This can be helpful with
extreme placements, certain crossover slopes or blending
to main speakers driven by amplifiers with inverted polarity.
Volume Yes Yes During Manual-EQ, you can set the volume level from 1 to
(1-99) 99 for each preset (1-5) separately from the Setup preset
(the 0 or global preset) volume. The Setup preset volume
can be changed permanently or temporarily using the
Windows and TV screen interfaces or temporarily using the
volume control on the remote or the volume knob on the
front of the subwoofer. If the change made by the volume
control on the front or on the remote is desired to be
permanent, you must enter either the TV screen interface’s
setup menu or the Windows Setup Program and select to
save and exit. Otherwise, the new volume setting will be
lost upon turning off power to the subwoofer.
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Digital Drive PLUS User’s Manual OPTIMIZATION
EQ Parameter Set with Set with Description
Auto-EQ PLUS Self-EQ