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Listed below are the most important recommendations for the use of the
8x4 Selector:
1- To avoid any equipment failures its vital to connect to the 8x4 Selector the
following things: the instrument, the amplifier inputs, the amplifier outputs and
the speakers. The initial connection should be with the amplifiers turned off or
Stand by.
2- Once everything has been connected you can use the 8x4 Selector with
all the amplifiers permanently switched on. It's not necessary to use the
Stand By mode each time that you want to change the amplifier.
3- In the case where some speaker outputs are not being used, be careful
not to select them to avoid the amplifiers functioning without being charged.
4- This Selector contains an input mute system and phantom charge for the
amplifiers which have not been selected.
5- We recommend, to avoid any possible ground noise (This is not mandatory
and may the type of amplifier configuration you use, you will not have ground
noise), that only one of the amplifiers is connected to the electric ground*.
Preferably the most powerful amplifier or that which has the highest
consumption. By doing this avoid hum noise caused by ground loops.
NOTE: That doesn´t mean that the other amplifiers are not connected to the
ground. They are connected through the Selector. See the folllowing chart:
AMPLIFIER 1
(MOST POTENCIAL AND THE
ONLY ONE CONNECTED TO
THE ELECTRIC GROUND)
*This ground technique is very common in live performance setups and referenced in many
guitar electronic books, example: TUBE GUITAR AMPLIFIER ESSENTIALS by Gerald
Weber - Foreword by Joe Bonamassa.
RECOMMENDATIONS
AMPLIFIERS 2,3 ... 8
(NOT CONNECTED TO THE
ELECTRIC GROUND)
5
NOTE: We recommend the use
of a lif grounding plug adapter
(see photo below) or amp cables
without the ground pin (see
photo below).
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