Wisdom Audio DCAB-1 - Manual (Page 24)

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notch 1, 2, 3 The high pass portion of the crossover has three independent, parametric notch
filters. The first two columns give you control over the center frequency (in Hz)
of the filter, for the Left and Right speakers, respectively. The next two columns
give you Left/Right control over the amplitude (or depth) of the notch. The last
two columns give you control over the Q (or width) of the notch. Taken togeth-
er, these controls allow you to tame the three largest or most troublesome peaks
in the system’s response, as measured in your own listening room.
The Amplitude and Q parameters interact with each other to a significant
degree. Specifically, when the Q is at 100% (an extremely narrow spike or
notch), the effect on the frequency response is minimal. As you open up the
Q, not only does the result affect more frequencies (which you would expect),
but the absolute size of the correction increases. Thus the amplitude values in
decibels are suggestive rather than authoritative. Some experimentation will be
necessary until you develop a “feel” for the nature of the controls.
Important Make sure your adjustments in the high pass (planar) section of the
DCAB-1 are all acting above the crossover frequency. Similarly, limit
your low pass (woofer) corrections to frequency below your selected
crossover frequency.
boost 1, 2, 3 The high pass portion of the crossover has three independent, parametric boost
filters. The first two columns give you control over the center frequency (in Hz)
of the filter, for the Left and Right speakers, respectively. The next two columns
give you Left/Right control over the amplitude (or height) of the boost. The last
two columns give you control over the Q (or width) of the boost. Taken togeth-
er, these controls allow you to tame the three largest or most troublesome dips
in the system’s response, as measured in your own listening room.
The Amplitude and Q parameters interact with each other to a significant
degree. Specifically, when the Q is at 100% (an extremely narrow spike or
notch), the effect on the frequency response is minimal. As you open up the Q,
not only does the result affect more frequencies (which you would expect), but
the absolute size of the correction increases. Thus the amplitude values are sug-
gestive rather than authoritative. Some experimentation will be necessary until
you develop a “feel” for the nature of the controls.