Duncan Convertible 2000 Owner's Manual - Page 11
Browse online or download pdf Owner's Manual for Musical Instrument Amplifier Duncan Convertible 2000. Duncan Convertible 2000 19 pages.
Print Page11. Channel Selector Jack: This jack accepts a standard 1/4" guitar or speaker cord (not
supplied) for connection to the footswitch. When hooked tip the footswitch allows you to change
channels and take advantage of the independent Volume, Overdrive, Tone and Reverb controls.
12. Variable Power Control: This control changes the power amplifier current to reduce or
increase power amplifier wattage 100 watt tube amps are great for playing in large clubs where
you need lots of power, but for smaller places, a low powered amp might be more useful. With the
Convertible 2000, you dial in the amount of power you need, from 100 watts down to 5 watts.
-For the cleanest signal, use oil 100 watts and turn the Master Volume control to adjust loudness.
-To get amplifier distortion, you need to work the power amp section hard-pushing it beyond its
limits. For a distorted sound, turn the Master Volume Control past 1 o'clock and use less power.
You will get a warm round distortion that is heard only on small amplifiers.
Variable Power is not like typical preamp overdrives. The Variable Power circuit actually controls
the output stage of the amp. When the Master Volume control in set low, you will notice little or no
change from the Variable Power control because you are asking the amp to give you very little
wattage. The higher you set the blaster Volume control, the more you will notice the effect of
Variable Power. Experiment to rind where you like it best.
Note: The full power range (6 to 100 watts) is available when running the amp in the Pentode
mode (See Page 11 for Pentode/Triode Switch.) Variable Power iv-ill control 3 to 60 watts in the
Triodo mode.
13. Variable lower Jack: Use this jack with a passive volume pedal (100-500K ohm range) to
remotely change Variable Power.
- CAUTION: An active volume pedal (the type that uses batteries or a.c. power) will not work in
the circuit.
When you turn up the Variable Power, you not only got the most power available, but also less
distortion from the amp. If you want to change Variable Power while you're playing, a volume
pedal lets you do it easily. Many players like to use all 100 watts while playing clean rhythm and
then use Variable Power with a volume pedal to reduce the power and get amplifier distortion for
lead work.
Variable Power can also be changed with a footswitch. When the footswitch is "Off" you will get
all 100 watts. When the footswitch is "on", you will get only 5 watts. When using the footswitch,
the Variable Power Control knob will have no effect. Your only choices are 100 watts or 6 watts.