High-Pass and Low-Pass Filter combined with Notch Filter.
The W791 combines sweeped high-pass and low-pass filter with a notch filter. The module ist best suited for filtering of disturbances of any kind.
Inputs and outputs of the modules are balanced and available in electronically and transformer balanced versions. The maximum operation is level is + 30 dBu- Due to the double balanced principle of adt-audio, the internal headroom is also + 30 dBu.
The High-Pass and Low-Pass Filter is a 'maximum flat' filter with 24 dB/oct. slope steepness. The high-pass can be swept from 'OFF' (> 25 kHz) to 2 kHz. The switch 'x0.1' shifts this range down to 2.5 kHz to 200 Hz. The low-pass filter ranges from 'OFF' (< 15 Hz) to 300 Hz. The 'x10' switch shifts this frequency range to 150 Hz to 3 kHz. The filters are active when the FILT ON switch is pressed.
The sweep range of the Notch Filter covers the entire audio band, divided into 3 ranges that can be selected by the MULT switch. The frequency control covers a range of 1 to 10. The entire filter frequency range reaches from 20 Hz to 20 kHz. The q-factor of the filter can be controlled from an octave down to less than a half tone. Using such small settings allows precise suppression of disturbances. The attenuation in the cut band can be adjusted from 0 dB to more than 40 dB in the MAX position. The notch filter section has a separate bypass switch.
The hard-bypass connects input and output of the device in the off state.
The W791 high-pass, low-pass, and notch filter is a single slot V700 standard modules that fits into standard frames.