Viper MF-105B warranty Basic Settings for checking out the filters

The Bass MuRF’s FILTERS

The Bass MuRF’s seven resonant filters have fixed center frequencies and a shelving(lowpass) filter that has a fixed cutoff frequency. These frequencies are shown on the legend underneath the filters’ sliders. Their frequencies are: 110 Hz(shelving filter), 160 Hz, 240 Hz, 350 Hz, 525 Hz, 775 Hz, 1.2K and 1.8K.

Each filter has a slider that adjusts the gain of that filter. In this respect, the Bass MuRF resembles a graphic equalizer. When a filter’s slider is all the way down, the gain for that filter is zero, and the filter’s output is zero. When the slider is all the way up, the filter’s output is maximized. The resemblance to a graphic EQ ends there. The Bass MuRF’s filters have a characteristic that sets them far apart from a graphic equalizer. A graphic equalizer will theoretically not color the signal at all when all the sliders are set to the same level. The Bass MuRF’s resonant filters and shelving filter on the other hand color the signal a great deal, adding warm analog resonances at pleasing intervals through out the frequency spectrum of a bass instrument. We’ll now show how the Bass MuRF’s filters affect your MF-105B frequency response. We will always start with this ‘basic’ panel setup, which is:

1) Set each of the filters’

sliders to all the way up.

2) Switch the PATTERN to

Bank A, Pattern 1. Pattern 1

turns off the Animation so you

can hear the effect of just the filters.

Figure 5 - Basic Settings for checking out the filters.