Operational Elements
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LF-LMF Cut and LF Boost
The low cut frequency range extends from 30 Hz to 1.9 kHz and will be referred to in this text as
Optically these filter bands may be represented as having a shelving characteristic with an 6 dB slope. Passive filters do not allow for direct alteration of the slope gradient because this quality is
The lowest frequencies begin here with 10 Hz, then follow with 15, 18, 26, 40 Hz, and so on. At this point one might think that such a lavish set of frequency choice in this range might be a bit overdone, as there is acoustically a rather limited amount of audio material of any real significance below 26 Hz. However, these choices are anything but arbitrary. These frequen- cies represent a consistent
MF-MHF Cut and LMF-MHF Boost
The midrange bands elevate the Passeq to a complete combination of filter options that classic passive designs do not offer. Both midrange bands exhibit peak filter characteris- tics, that is, when viewed from the boost band, the frequency curve appears as
The
The overlapping band characteristics give a good idea of the available degree of precision in frequency adjustment: For example, one can boost in the
14 | Passeq |