however, need an old fashioned analog signal, so the processor needs
to convert the signal back to analog before it goes back to the amp.
Generally, even in highest quality effects processors, this causes a
change in the original signal, typically a loss of tonality and warmth,
also noticeable as a “harder” sound.
When you use the serial loop for an effects unit like this, then your
signal will have been ADA converted at least once. Tone junkies and
vintage freaks alike will more than likely have hives developing by now.
But, as always, there is a better way. Using the Parallel loop and the
mix (labeled “Volume”) control on the back determines how much
effect signal is being added to the original signal, which now still flows
through the amplifier. There is always an analog connection between
the send and return jacks: a parallel loop!
Important: You must set the mix control on the effects unit to 100%
wet when using the parallel loop. Otherwise there will be nasty
phasing problems resulting in unsatisfactory tone. The signal portion
that is unaffected by the mix control in the effects unit would reach
the amplifier at a different time due to the cabling, and cause phasing
cancellations.
3.2.3 Switch-able Loop as additional Volume Control
Those of you who can live without processors in the parallel loop
can use this loop for a second master volume for each channel.
To do this, just loop a short 1/4” cable from the switch-able send to
parallel loop return. Now you can choose a second master volume by
turning the mix control past 1:00 PM to full open, and push the ‘
Loop” button to activate your second master volume. Now, with the
loop activated, the mix control can act as another way to control
volume.
3.2.4 Switch-able Loop for external pre-amp
One might extend one’s tonal variety by hooking up an external guitar
pre-amp to the switch-able return jack. Now the external preamp, once
selected via the “Loop” function, can feed the Herbert’s power amp.
3.2.5 Switch-able Parallel Loop
To route your effects signal parallel to the original signal, connect the
switch-able send to the input of your effects unit and go from the
