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Speaker Outputs| output impedance options | 4 ohms, 8 ohms, 16 ohms |
|---|---|
| simultaneous output capability | All three jacks may be used simultaneously |
Technical Specifications| driver stage tubes | 1 x ECC 83 (or 12ax7 or 7025), 1 x ECC 82 (or 12AU7) |
|---|---|
| power stage tubes | 4 x EL 84 |
| output per channel in pentode mode | 50 watts RMS |
| output per channel in triode mode | 25 watts RMS |
| input sensitivity | 300 mV to 10 volts |
Presence Control| presence 1 adjustment | + 4 dB @ 4000 Hz, broadband |
|---|---|
| presence 2 adjustment | +2 dB @ 6000 Hz, broadband |
Cooling and Protection| cooling system | Temperature-control-circuitry, heat exchanger, and Papst fan |
|---|---|
| thermal protection | Automatic shut-off |
Essential precautions for operating and handling tube amplifiers safely, including warm-up and cooling.
Details the Stand by, Volume, and Presence controls located on the front panel.
Covers power cord jack, main fuse, voltage selector, and anode fuse details for operation.
Compares Pentode and Triode modes, their sonic impact, and power differences.
Details connecting a footswitch to change presence modes between PRESENCE 1 and PRESENCE 2.
Explains the cooling system, heat exchanger, fan, and automatic shut-down feature.
Describes the input jacks, their purpose, and input bridging capabilities for various configurations.
Explains the impedance options (4, 8, 16 ohms) for connecting speaker cabinets.
Lists key technical details including tubes, output power, input sensitivity, and presence control specs.
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