Do you have a question about the Duncan Convertible Head and is the answer not in the manual?
Inspect your Convertible amp for hidden damage that may have occurred in transit.
Save all packing materials for potential return shipment to the factory.
Use load resistor plugs to match amp input impedance to pickup output voltages.
Guidance for matching pickup impedance to the amp's 4.7 meg-ohm input jacks.
Parallel input for a second guitar or instrument; affects volume and signal.
Controls preamp distortion/volume and sends signal to power amplifier.
LEDs indicate active channels; tone controls adjust treble, mid, and bass.
Adjusts high-end, mid-range, and low-end response using passive filters.
Controls reverberation amount and allows manual channel switching.
Connects a footswitch for channel switching and control.
Adjusts power output wattage and allows remote control via a pedal.
Houses the fuse for protection and controls power and AC polarity.
Temporarily turns off sound output while keeping tubes warm for quick restarts.
Provides AC power for external equipment, up to a total of 700 watts.
Connects external effects units and reverb units for enhanced sound shaping.
Changes EL-34 output tube operation between 100W Pentode and 60W Triode modes.
Controls speaker damping and provides impedance-matched speaker outputs.
Patches the amp's output signal directly to other audio units like mixers.
Shows the default preamp module arrangement for Channel 1 and Channel 2.
Illustrates various module combinations for achieving different sonic results.
Details module characteristics like Model, Type, Circuit, Frequency Response, and Gain.
Describes quiet, clean tube sound and low-frequency cutting for leaner tone.
Details solid-state modules and a tube module for varied tonal characteristics.
Describes compressed distortion, low gain, and up-front sound enhancement.
Details brighter, 'dirtier' tones and low-frequency cutting for cleaner sounds.
Describes high sustain, gain, chunky rhythm, and long sustain characteristics.
Provides upfront punch, brightness, and deluxe type sound options.
Details hybrid drive, more hi-end, hot/crunchy tone, and higher gain options.
Offers crisp rhythm with presence and crunchy lead sounds with EQ capabilities.
Provides odd order harmonics for metal and sounds for loud rock and roll.
Offers extended tone range and 4-band EQ for customizing rhythm and lead sounds.
Step-by-step instructions for safely removing preamp modules from the amplifier.
Step-by-step instructions for installing new preamp modules into the amplifier.
Offers methods to eliminate microphonic ringing in preamp tubes.
Compares tube types and suggests using FET/IC input modules to prevent microphonics.
Discusses EL-34 power tubes and robust alternatives like 6CA7, 6L6, and 6550.
Lists the two load resistor plugs provided with the amp and their effects.
Provides information on building custom load resistor plugs using components.
Diagnoses and resolves issues with the amplifier not powering on or producing sound.
Addresses causes of excessive hum, including power and grounding issues.
Diagnoses and resolves issues causing fuses to blow after operation or immediately.
Addresses distorted sound occurring on one or both channels of the amplifier.
Provides solutions for issues with reverb functionality and channel switching.
Offers remedies for feedback or unwanted ringing sounds from the amplifier.
| Wattage | 50W |
|---|---|
| Impedance | 4, 8, 16 ohms |
| Footswitchable Channels | Yes |
| Type | Tube |
| Tubes | 4 x 12AX7 |
| Controls | Bass, Middle, Treble, Presence |
| Effects Loop | Yes |