Velodyne DS-10 - Manual (Page 25)

oPtimizatioN PaRameteRS (eQ)
The following table describes the subwoofer EQ parameters that are either automatically configured with Auto-EQ and/or Self-EQ. All of these
parameters can be manually customized by you using the Manual-EQ method.
EQ Parameter Set with Set with Description
Auto-EQ Self-EQ
Low Pass Crossover No No The upper limit of your subwoofer’s frequency response.
Frequency and Slope The crossover frequency can be set to increments of 1 Hz,
between 40 Hz and 199 Hz or it can be disabled (-- or OFF).
The crossover slope can be set to 6, 12, 18, 24, 30
or 36 dB/octave.
Typically, these parameters are the same for all the
presets however you can choose to vary the values
in thedifferent presets.
For Self-EQ the crossover frequency is set to 160 Hz
with a slope of 24 dB. For Auto-EQ the crossover frequency is
set to 80 Hz with a slope of 24dB. The subwoofer crossover
frequency can also be changed by the subwoofer’s front panel
control. Please note that this type of change is temporary until
you change it and save it to the DS-10 using the TV interface.
Subsonic Filter No No Sets your subwoofer’s lowest frequency limit in increments of
Frequency and Slope 1 Hz between 15 Hz and 35 Hz. The subsonic filter slope
can be set to 6, 12, 18 or 24 dB/octave.
Usually, the subsonic filter doesn’t need to be changed from
its default of 15 Hz with a steep roll off of 24 dB. The default
settings provide the maximum protection at the widest
bandwidth. Increasing the crossover frequency protects the
subwoofer more; lowering the slope protects it less.
If your subwoofer isn’t adequately protected at very low
frequencies, you can blow up the subwoofer’s amplifier or
cause other damage that requires subwoofer replacement,
which are very expensive repairs.
It is easier to overdrive the subwoofer at these low
frequencies because you can’t hear these frequencies.
Warped vinyl records can have unexpected output at very
low frequencies and damage the subwoofer. Some CD’s
are made without filtering this part of the signal out.
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 DS-10
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.
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OPTImIZATION
Digital Servo User’s Manual
EQ Parameter Set with Set with Description
Auto-EQ Self-EQ