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SHAPING TONE
While finding the sweet spot and getting the right tone with the Black Box
Analog Design™ pre is more about feel than anything, it is still helpful to
know how each part of the circuit behaves and reacts. This section goes into
more detail about how each control affects the tone and gives some ideas
The Pentode stage gives you the most extreme control over the frequency
response of the mic/pre combination. In the graph below you can see how the
Pentode has a frequency response that "tilts" around a fixed top end depending
on the gain setting.
L + R
-20
-40
-60
125
Along with control over the frequency response, the Pentode can be pushed
into the Triode much the way you can drive one stage of a guitar amplifier into
the next. The result here is of course much more subtle but it can have a very
pleasing effect.
8
A CLOSER LOOK
Pentode Stage
250
500
Pentode 8 o'clock
Pentode 1 o'clock
Pentode 4 o'clock
1000
2000
A N A LO G D E S I G N
4000
8000
16000
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