Rochambeau Musical Apparatus (RMA)
The RMA Mudlark is a fairly straightforward circuit.
There is an initial boost section followed by both a bass & treble Baxandall tone stack, and a fuzz section, feeding a final output section.
The order of the tone stack & fuzz can be reversed with the flip of a switch and a bi-color LED serves as both status and order indicator. Red = boost->EQ->fuzz->output, and Blue = boost->fuzz->EQ->output.
Furthermore, there is an optional modification that allows a switchable mode which increases the gain while decreasing sustain with self-oscillation at extreme gain settings.
The RMA Mudlark comes in two primary configurations: three knob and five knob. The five knobs are as follows:
- initial gain setting (boost)
- mid gain setting (boost output level)
- output level (no mystery there)
- bass level
- treble level
In the three knob configuration controls 1 & 2 are employed in a single dual gang control, and 4 & 5 are tied to a secondary dual gang control, however, CCW rotation turns bass up while turning treble down, and CW rotation turns treble up while turning bass down.
Runs on standard 9-volt center negative DC power connection.