THE AUDIO LEVEL CONTROLS AND MIXING
The DRIVE control adjusts the signal level at the Bass MuRF’s
circuit input. With this control you can set the right input level
for virtually any instrument or line-level signal source. Turn this
control counterclockwise for strong input signals, and clockwise
for weaker sound sources.
The DRIVE light tells how strong the input signal is after being
adjusted by the DRIVE control. As the signal level increases, the
light goes from off, to green, to yellow, and nally to red. Very
weak signals do not light up this light at all. When the light is
green, the signal is below the level that results in audible distortion.
When the light is yellow, some low order distortion may be
audible, giving the sound a subtle warm analog quality. When the
signal is strong enough to drive the light into the red, the distortion
at the output becomes stronger and more distinctly audible. Watch
this light when you set the DRIVE control for the desired effect.
The OUTPUT control adjusts the strength of the Bass MuRF’s
signals that appear at the LEFT/MONO and RIGHT output jacks.
Use this control to balance the Bass MuRF’s signals with the
bypassed signal. Note that neither the DRIVE nor the OUTPUT
controls affect the strength of the bypassed signal.
USING BOTH AUDIO OUTPUTS TOGETHER
The Bass MuRF has two audio outputs: LEFT/MONO and
RIGHT. When a cable is plugged into just the LEFT/MONO jack,
Figure 12 – Left and Right Frequency
Response of the Bass MuRF’s Filters
the output of all lters are sent
to that jack. If a cable is inserted
into the RIGHT jack, then half
of the lters are sent to the
RIGHT output, and half are sent
to the LEFT/MONO output. .
Figure 12 shows the frequency
response of the left and right
outputs when both the left and
right output jacks are used.
