The depth of the Notch is in excess of 60dB
The Optimizer´s proportional- Q parametric filter design, combined with its switchable alternative filter modes, gives you the flexibility to emulate many different types of equa- lizer.
The Boost/Cut control beco- mes the Gentle/Steep control in Notch, Band-Pass, High- Pass or Low-Pass modes. Turning the control fully anti-clockwise produces a gentle roll-off while turning it fully clockwise produces a steep-sided response.
The Optimizer has active output stages for each filter increasing phase stability dramatically.
addition each filter is equipped with a notch-filter. Selecting the Notch mode overrides the mode switch selector. So com- plex combinations of filter types can be used in the same sig- nal path. For example, a parametric filter could be combi- ned with a High- and Low-pass and Notch filter.
When working in Notch, Band-pass, High-Pass or Low- Pass modes, you have a choice of roll-off characteristics which greatly extends the tonal capabilities of the Optimizer. For example, in the Notch filter mode, you have control over frequency and bandwidth and also over the steepness of the sides of the notch. The depth of the Notch is in excess of 60dB, providing an extremely high degree of rejection compared with conventional parametric filters.
The subjective performance of certain classic equalizers is highly dependent on the roll-off characteristics of their filter circuitry. These equalizers sound excellent, but their circuit topography imposes a rather fixed character on them. By contrast, the Optimizer´s proportional-Q parametric filter design, combined with its switchable alternative filter modes, gives you the flexibility to emulate many different types of equalizer. In addition, you can set up further equa- lization types that even the best conventional equalizers can- not provide.
To keep the control layout simple, the BoostCut control used in Parametric mode becomes the Gentle/Steep control in Notch, Band-Pass, High-Pass or Low-Pass modes. Turning the control fully anti-clockwise produces a gentle roll-off while turning it fully clockwise produces a steep-sided res- ponse. If the control is set in the center position, the input signal will cancel itself out completely, resulting in no out- put. Settings between the extremes and the center (null) posi- tion produce further useful variations in filter slope charac- teristic, though you may need to compensate for the level loss incurred by settings close to the center position, by tur- ning up the Output level control.
Selecting a steep filter characteristic produces a tightly focused, punchy tonal characteristic while choosing a gentle slope produces a subtle change in tonality which has the effects of adding a sonic gloss to the programme material.
We have invented a new all active output stage approach to mixing filters: Commonly filters in parametric or graphic equalizers mix passively resulting in increased phase distor-
