Mark V and G Major 2 Channel Switching
- Thread starter gwil21
- Start date
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ryjan
Well-known member
I believe the G major only has two relays so it can only switch two functions.
SonVolt
Well-known member
I'd like for Authorized Boogie to chime in on this and whether it's safe. I have a G Major 2 as well and have been scared to test it on my Mark V.
Authorized Boogie
Well-known member
This is a guide to help customers connect their external switching devices such as the GCX Audio Switcher or the TC Electronic G System to Mesa/Boogie amplifiers that have external function switches.
1) Lonestar; Lonestar Special; Stiletto Ace, Deuce, and Trident; Roadster; Series II Road King; Rectifier Recording Preamp; Series II Rectoverb/Solo 50; Mark IV; Mark V; Two-Channel Dual and Triple Rectifiers; Three Channel Multi-Watt Dual and Triple Rectifiers; Mini Rectifier; Tremoverb; Express and Express Plus; TA15 and TA30; 2:90 Power Amp:
These amplifiers all use ground as the switching reference. The sleeve of each external switch function jack on the amplifier is connected to ground inside the amplifier, and can be connected together outside the amplifier. This means that Y-Cord function switchers can be used. Note: if the sleeve of the switching device jack is not isolated from ground, a ground loop may occur.
Note: All amps listed above that use Mono or TRS footswitch jacks can use the footswitch jack for external switching. The reference is ground, same as the external switching. In most cases Tip is the Channel and Ring is the Solo or Reverb.
2) Three Channel Dual and Triple Rectifiers (non-Multi-Watt); Series I Road King; Series 1 Rectoverb/Solo 50; Nomad 45, 55, and 100 (Nomads do not have external switching jacks, but this applies to our breakout box):
These amplifiers use -3V as the switching reference. The sleeve of each external switch function jack on the amplifier is connected to the same -3V supply, and can be connected together outside the amplifier. HOWEVER—the switching device jack sleeve MUST be isolated, or problems will occur (such as smoke, fire, and general frustration). This also means that Y-Cord function switchers can be used, but the Y-Cord cannot be connected to any other device or amplifier.
I hope this helps. Thanks!
1) Lonestar; Lonestar Special; Stiletto Ace, Deuce, and Trident; Roadster; Series II Road King; Rectifier Recording Preamp; Series II Rectoverb/Solo 50; Mark IV; Mark V; Two-Channel Dual and Triple Rectifiers; Three Channel Multi-Watt Dual and Triple Rectifiers; Mini Rectifier; Tremoverb; Express and Express Plus; TA15 and TA30; 2:90 Power Amp:
These amplifiers all use ground as the switching reference. The sleeve of each external switch function jack on the amplifier is connected to ground inside the amplifier, and can be connected together outside the amplifier. This means that Y-Cord function switchers can be used. Note: if the sleeve of the switching device jack is not isolated from ground, a ground loop may occur.
Note: All amps listed above that use Mono or TRS footswitch jacks can use the footswitch jack for external switching. The reference is ground, same as the external switching. In most cases Tip is the Channel and Ring is the Solo or Reverb.
2) Three Channel Dual and Triple Rectifiers (non-Multi-Watt); Series I Road King; Series 1 Rectoverb/Solo 50; Nomad 45, 55, and 100 (Nomads do not have external switching jacks, but this applies to our breakout box):
These amplifiers use -3V as the switching reference. The sleeve of each external switch function jack on the amplifier is connected to the same -3V supply, and can be connected together outside the amplifier. HOWEVER—the switching device jack sleeve MUST be isolated, or problems will occur (such as smoke, fire, and general frustration). This also means that Y-Cord function switchers can be used, but the Y-Cord cannot be connected to any other device or amplifier.
I hope this helps. Thanks!
