11. FOOTSWITCH JACK SOCKET.
The footswitch jack socket (rear of amplifier) enables channel switching using any latching
footswitch.
12. OUTPUT SWITCH. (HALF/STBY/FULL)
The output switch (found next to the power switch on front of amplifier) runs the valves at a low
plate voltage (reducing output power and running in Class AB-1) in the HALF position and at a
higher plate voltage (increasing output power and running in Class AB-2) in the FULL position.
The middle position is the standby position. This switch should be in the standby position for
around two minutes after first powering up the amplifier!
13. 2 OUTPUT TUBES/4 OUTPUT TUBES SWITCH.
The 2 Output Tubes/4 Output Tubes switch (found on rear of amplifier) removes two of the EL34
output valves, when in the 2 OUTPUT TUBES position. This switch also takes care of the speaker
impedance (in the background), when in the 2 OUTPUT TUBES position. This means that the
speaker impedance is always as stated in the screen print, above each speaker output jack
socket, regardless of the position of this switch.
14. OUTPUT POWER COMBINATIONS.
Output switch HALF, 2 OUTPUT TUBES = 35watts Class AB-1.
Output switch HALF, 4 OUTPUT TUBES = 70watts Class AB-1.
Output switch FULL, 2 OUTPUT TUBES = 50watts Class AB-2.
Output switch FULL, 4 OUTPUT TUBES = 100watts Class AB-2.
(The power amp will overdrive earlier when switched to the HALF, Class AB-1 position).
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