Out 1, Out 2, Etc; Crossover Filters; Parametric Equalizers - BBE DS24 User And Reference Manual

Digital speaker processor
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9.4 OUT 1, OUT 2, etc.

Each tab selects an output channel. Use this screen to program crossover frequencies, fil-
ter type, and up to five parametric EQ's. In addition, the same programming choices as on
the GAIN screen are duplicated here, but just for the selected output channel.
9.5 Crossover Filters: [insert screen shot of PEQ filet settings screen]
The Low and High frequencies set the frequency bandwidth for the selected channel of
the crossover. For example, in a three-way crossover, the Low Band might be 60 Hz to
200Hz; the Mids 200Hz to 1800Hz and the Highs 1800Hz to 15 kHz.
The different filter types and slopes, including Bessel, Butterworth, Linkwitz-Reilly and
shelving filters with different Q values each offer particular advantages and disadvan-
tages depending on the application and conditions.
Most analog crossovers use 24 dB/octave, so this is a good place to start.
The window also includes a graphic display that shows the response curve of the current-
ly selected filters and equalizers in a Level vs. Frequency graph.
Clicking on any of the filter text boxes (lower left of the window) opens a new window
called XOVER. Use the sliders to browse the available filter types and click on the desired
one. Use the horizontal slider to select the corner or "knee" frequency. This is the frequen-
cy point at which a filter begins to attenuate any signal above (for Low Pass) and below
(for High Pass) the selected frequency. The choices are preset in specific increments and
ranges that correspond to the selected crossover architecture (2 Way, 3 Way. etc.).
You can use the PEQ to help compensate for dips or peaks at the crossover points.
Remember though that less equalization is better: try to use a combination of slope, filter
type and frequency to get the crossover point between bands (for instance: low to mids
or mids to highs) as "flat" as possible. The will minimize the need for additional equaliza-
tion
Always check the manufacturers specifications for the speakers you are using so the
proper crossover settings can be used, Incorrect settings or mis-wiring (sending lows to
a HF driver for instance) can damage or destroy your equipment. BBE Sound is not liable
for any direct or consequential damages caused by improper use of its equipment.

9.6 Parametric Equalizers:

The next set of text boxes provides Frequency, Gain and Q setting choices for five bands
of parametric equalization (PEQ) per output channel. There is also a check box for Flat,
which will bypass the settings for that particular filter. In a similar manner to the
Crossover filters above, clicking on any text box will open the PEQ filter settings window.
CREATING A PROGRAM
23

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