7
4. General operation
4.1. Channels
The
Crunch Machine
has 2 channels :
A Classic channel, which provides a smooth, full tone with a rich harmonic content.
A Rock channel, based on a Plexi-type circuit. This channel will allow you to reach
higher levels of ‘crunch’ and overdrive.
The channel
[11]
switch allows you to activate one or the other channel.
You can also use the footswitch to select your channel. See chapter 8. Footswitch for more
information.
4.2. Power-up
1)
Check that the power
[1]
switch is in the off position, and the standby
[3]
switch is in the
standby position. The volume knobs on both Classic and Rock channels should be set on
0.
2)
Connect a load to the appropriate speaker output
[18]
(showing the same impedance).
3)
Connect the amplifier to an earthed 230VAC outlet
4)
Put the power
[1]
switch in the S.S. or Tube position, depending on the desired rectifier
mode (see chapter 5.3 for more details)
5)
Wait 5 mn before putting the standby
[3]
switch in the Home or Stage position,
depending on the desired maximum output power level (see chapter 5.4 for more details)
4.3. Rectifier mode
The
Crunch Machine
offers 2 selectable rectifier modes, which influence the amplifier’s power
supply:
