SPL Channel One 2950, Руководство пользователя

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AIR BAND
The high frequency filter in the equalizer module is described as the AIR BAND. A coil-
capacitor-filter with so called bell characteristics and a center frequency of 17.5 kHz comes
into operation here. At this frequency the maximum possible accentuation is +10 dB, the
maximum possible damping is -10 dB.
The soft and natural tonal property, characteristic of the coil-capacitor filter, lends itself
extremely well to provide clarity and ... well, air, to vocals in the upper frequency range
thereby improving their presence. On the other hand harsh sounds can be lent a more
pleasant sound characteristic through damping.
The characteristics of the AIR BAND filter are shown in diagram 2 on page 26.
FET DISTORTION
The DISTORTION control offers the capability of applying distortions to signals. The distor-
tions are infinitely variable from 0% through to distinctly perceptible harmonics. The distor-
tion stage is located in front of the equalizer so that the newly created spectrums can also be
processed with the EQ.
A (more or less over-driven) field-effect transistor forms a part of the distortion circuitry. It’s
characteristic curve is similar to a tube and sounds distinctly “warmer” than a pure diode-
distortioner.
The signal level is of utmost importance to the operating mode of the DISTORTION module.
To achieve useful results the level should lie in the range 0 to + 6 dB. Over and above this
the results are strongly dependent on the condition of the input signal and its spectrum.
The processing of sinewave-like signals (e. g. e-piano, vocal, guitar) is audible much earlier
than signals with predominant harmonical contents (e. g. snare drum, hi hat etc). It is recom-
mended that time and effort is taken to find the correct setting.
IMPORTANT: To avoid irritations at the beginning of a recording it is recommended to deac-
tivate the EQ, and in particular set the DISTORTION control to 0%. If not, tonal changes will
occur immediately and furthermore, in the case of the DISTORTION control, additional distor-
tions.
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Channel One
Equalizer/FET Distortion
Control Elements