Front Panel Operation
ENGLISH
Channel Section
Pressing a channel button has two functions:
When coming from a different channel it recalls the last setting in the new selected channel.
When pressing in the same channel it cycles the
modes: GREEN > ORANGE > RED > GREEN...
Each mode remembers the FX, Reverb and Master settings.
Example: You are in OVERDRIVE ORANGE with FX + REVERB and you press CLEAN. The amp switches to the last Clean mode you had (let’s assume it was CLEAN GREEN with REVERB). If you press the OVERDRIVE switch you go back to OVERDRIVE ORANGE with FX
+REVERB. This allows bouncing between channels without losing the settings. If you now press OVERDRIVE again, you go to OVERDRIVE RED with whatever FX, MASTER and REVERB settings you had last time you were in this mode.
Pressing REVERB (7) switches the reverb ON and OFF in the current channel.
Pressing FX LOOP (4) switches the parallel FX loop ON and OFF in the current channel.
Master Section
REVERB Control (7)
Alongside the REVERB switch each channel has its own reverb control allowing individual level settings of the effect.
MASTER 1 / MASTER 2 (5)
These are the master volume controls of the amplifier. They can be assigned individually to each of the modes as you wish and the master selection will be stored in each of the modes.
PRESENCE, RESONANCE (6)
These controls are power amplifier controls and only have effect when playing through a speaker (not in silent recording). They affect how the power amplifier reacts to the connected speakers and how much control the amplifier has over them.
Increasing the RESONANCE control emphasises the natural speaker’s resonance for an improved bass response. In the same way, increasing the PRESENCE control emphasises the speaker’s high frequencies which will be heard as an improved high frequency response which adds presence to the sound.
Presence and Resonance constitute a powerful power amplifier equaliser, allowing responses from a ‘^’ shape when they are fully counterclockwise, which is felt as a mid boost, to a ‘v’ shape when they are turned clockwise, which is felt as a scooped sound. Again, the effectiveness of these controls is highly dependant on the kind of connected speakers. Care has to be taken to avoid over excursion of the speaker cones in high resonance settings.
FX LOOP (4)
This is a programmable FX loop which features a MIX control on the rear panel and it is located after the
(4)engages this effects loop. Please refer to the Serial / Parallel Loop description later on in the handbook for its operation.
FOOTSWITCH / MIDI PROGRAM (3) This switch has a dual function:
Pressing it once we enter the FOOTSWITCH PROGRAM mode. It is indicated by a continuous red light.
Pressing it twice we enter the MIDI PROGRAM mode. It is indicated by a blinking red light.
Footswitch program and use
The JVM range features a new type of fully configurable footswitch. Connection to the amplifier requires a standard mono 1/4" jack to jack cable. Any guitar lead will work and practically there should be no limit in its length.
When the front panel FOOTSWITCH / MIDI PROGRAM switch is off, the footswitch operates in safe mode and executes the commands the moment the switch is pressed down.
If you enter the FOOTSWITCH PROGRAM mode (LED red) you will be able to program the footswitch but nevertheless the footswitch and the amplifier will remain fully operational with the only difference that the commands will be executed when releasing the footswitches, as opposed to the normal mode.
Each of the individual footswitches has 2 modes of operation: preset store and switch store.
In preset store mode, any of the footswitches can be configured to store the current amplifier status. The current channel, master, FX and reverb status will be stored and recalled when the respective footswitch is pressed.
To store the current status simply:
Set the amplifier to FOOTSWITCH PROGRAM mode (red light ON).
Press and hold the desired switch for about 3 seconds.
The FX footswitch LED will flicker a couple of times indicating that the preset has been stored.
In switch store mode, any of the footswitches can be configured to replicate the front panel switches and the amplifier will react exactly in the same way as when you operate them on the front panel.
All the front panel switches can be mapped to any of the footswitches without any limitation. The only exception is the FOOTSWITCH / MIDI PROGRAM switch which cannot be assigned to the footswitch.
To assign any of the front panel switches (except FOOTSWITCH / MIDI PROGRAM) to any of the footswitches simply:
Set the amplifier to FOOTSWITCH PROGRAM mode (red light ON).
Press and hold the desired footswitch.
While holding the footswitch down, in less than 3 seconds, press the front panel switch you want to map.
The FX footswitch LED will flicker a couple of times indicating that the switch has been mapped.
From now on the selected footswitch will act exactly in the same way as if you press the related front panel switch.
Switches and presets can be assigned as wished without limitation and in any order (again, except the FOOTSWITCH / MIDI PROGRAM switch). The footswitch configuration is stored in the footswitch itself, not in the amplifier. Resetting the amplifier will not affect the footswitch configuration as well.
The footswitch can be
MIDI operation
Pressing the FOOTSWITCH / MIDI PROGRAM switch (3) twice puts the amplifier in MIDI waiting mode, the LED will flash until a valid MIDI program change command is received.
On reception of a MIDI program change command the amplifier stores the current status (Channel + FX + Reverb + Master Settings) in the MIDI program number received. It is possible to store up to 128 different MIDI presets.
To exit this status without waiting for incoming MIDI data press the FOOTSWITCH / MIDI PROGRAM switch (3) again.
Note about MIDI channels: By default the amplifier is configured to listen to MIDI channel #1 but it can be changed to listen to any of the
16 MIDI channels as follows:
Switch the amplifier off (Power switch (1), not Standby (2)).
Press and hold the FOOTSWITCH / MIDI PROGRAM switch (3).
Switch the amplifier on (Power switch (1)).
Release the FOOTSWITCH / MIDI PROGRAM switch (3), the LED will start to flash.
Send ANY MIDI command using your MIDI pedalboard or any other MIDI equipment.
The amplifier will detect which channel came in and configure itself to listen to that MIDI channel only. From now on any MIDI preset you had previously stored will be activated only on the new channel regardless of what channel you used before, this allows a fast reconfiguration should there be a MIDI conflict with any other outboard equipment.
If you want to exit the MIDI channel selection without any action press the FOOTSWITCH / MIDI PROGRAM switch (3) while waiting for MIDI data.
ENGLISH
6 | 7 |
