OUT-A
Amp 1
OUT-B
Amp 2
Press 'IN' the 180º
to reverse the phase
of OUT-B to bring the
two amps in phase.
Switchbone V2
Radial Engineering Ltd.
8
When both amps are on, there are two things to watch for… the
fi
rst
is noise, the second is phase. If you hear noise, try depressing the
ground lift switch on OUT-B. This works in conjunction with the isolation
transformers to eliminate hum and buzz caused by ground loops. This
lifts the audio ground, not the electrical safety ground.
When using two different ampli
fi
ers, these will often be out of phase
whereby one amp will be pushing the speaker forward while the other
will be pushing it backwards. This causes phase cancellation that is
most noticeable in the low end and can make the amps sound distant.
To test, face your two amps together (speaker to speaker) and listen.
Try depressing the 180
º
polarity reverse switch on OUT-B to hear the
difference.
ADDING A TUNER OR THIRD AMP
You can add a tuner to your setup using the dedicated TUNER out. This
output is both buffered and transformer isolated to ensure clocking noise
from the tuner is not audible in the guitar signal path. This also permits
the tuner out to be reassigned as a third amp when required.
Switchbone V2
Radial Engineering Ltd.
9
DRAG CONTROL LOAD CORRECTION
Drag is used to set the load that is being applied on the
pickup. We noticed early on that pickups sound quite
different depending on the type of amp or buffering circuit
to which they are connected. Drag lets you set the load to
match your personal setup and deliver a tone to your amp
that sounds as if you are connected directly. Set the DRAG
control to 12 o’clock and then rotate the control using a guitar pick as a
screwdriver. Turning the control clockwise will brighten the tone while
turning it counter-clockwise will darken it. Adjust to suit.
It is important to note that Drag will only work when used with regular
magnetic pickups and true-bypass pedals. In other words, the load that
is applied to your pickup will be established by the
fi
rst buffer in line.
Once the signal is buffered, other buffers down the line will have little
or no effect. The Bigshot EFX™ dual effects loop router provides a
great cost effective solution if you would like to bypass pedals that don't
feature true bypass themselves.
When the BOTH/OUT-C set & forget switch is in the OUT position, the
Switchbone V2 is con
fi
gured like a typical ABY switcher. In this mode,
the tuner output is always on. When the BOTH/OUT-C switch is pushed
inwards, it changes the BOTH function to add OUT-C so that no signal
will be present on TUNER/OUT-C unless the footswitch is depressed.
When used for a third amp, you should check for noise and phase
following the steps detailed above. Always use Amp-A as the reference
for phase.