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The output transformer in the VX100 has 3 separate secondary windings; a 16 Ohm, an 8 Ohm and a 4
Ohm. This makes it easy to connect many different combinations of speakers. There are five speaker
output jacks: 1 x 16 ohms, 2 x 8 ohms, (wired in parallel), 2 x 4 ohms, (wired in parallel).
So here are all the possible combinations:
1. For a single 4 Ohm cabinet, use either of the 4 Ohm sockets.
2. For a single 8 Ohm cabinet, use either of the 8 Ohm sockets.
3. For a single 16 Ohm cabinet, use the 16 Ohm socket, (internal speaker).
4. For a pair of 8 Ohm cabinets, use both of the 4 Ohm sockets
5. For a pair of 16 Ohm cabinets, use both of the 8 Ohm sockets.
Always ensure a speaker is connected to the amplifier before powering up or damage to the output
transformer may result. Never unplug a speaker when the amplifier is ON as this is even more likely to
damage the transformer and the output valves.
POWER AMP BASS FOCUS SWITCH
This function alters the negative feedback at low frequencies in the poweramp resulting in a ‘looser’ or
‘tighter’ overall bass response. This will be affected by the positions of the tone controls so please
experiment with this switch to achieve the bass response you desire.
MIDI Section
The switchable functions of VX100 can be activated using a standard MIDI controller. All of the
combinations of functions can be found in the table below. There are 24 separate MIDI Presets; for
example, Preset 3 will switch GAIN I/II to GAIN II, MASTER I/II to MASTER I, PREAMP FOCUS to OFF and
EFFECTS LOOP to ON. Any function labelled N/A in the table will not be available for that particular
Preset. For example, in Preset 3, CLEAN/CRUNCH is not applicable because the amp will be switched to
Gain II where that function is not available.
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