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Introduction
The
Boost 'n' Buff is not a reference to
some form of plastic surgery. It's
in fact the distillation of an idea
I've been working on for a few years
now. It's a design which is a bit of
a departure stylistically for me.
It's simple. It only has one knob.
No internal trimmers or tweaks.
Believe it or not, it actually
started out life as a 6 knob pedal,
but through a process of
consolidation, I've managed to
squeeze most of these functions
into this neat little package.
Why was
the original design so complex? Well
go grab a coffee, pull up a seat and
let me tell you,...
The
complexity arose from the fact that
I had isolated a few different
functions for booster pedals, and I
wanted to create a pedal which could
be set up to fulfill all of these.
These functions were: |
-
Buffer: With the increasing
complexity of today's pedal boards, and
with the proliferation of true bypass
pedals, guitarists are starting to
discover that your average guitar pickup
simply doesn't have enough oomph to
drive 50 feet of cable. A typical guitar
cable has 30pF of capacitance per foot,
so if all your effects are true bypass,
then in bypass mode you're effectively
adding a 1500pF capacitor across your
guitar output for the aforementioned 50
foot scenario! Add to this the inductive
component of your pickup's impedance and
you've got some serious and strange
resonances going on.
- Flat
Booster: Sometimes all that's
required is a simple booster with a flat
frequency response. This is generally
used for small volume boosts during
solos. For this application, any
alteration to the frequency response is
not a good thing. Also, for these
applications, a huge amount of boost is
generally not necessary. Up to 15db of
boost is more than adequate.
-
Treble Booster: In the case where
you're driving a valve amp into
overdrive, a flat frequency response is
generally the last thing that you want.
It will result in a very loose and
fuzzy tone, which is very difficult to
control. By altering the frequency
response, namely by boosting the top end
more than the low end, you can keep
everything nice and tight. Also, when a
guitarist uses a treble booster to push
their amp, they're generally not very
'subtle' about it. They don't use 1 or 2
db. They use 15db or more.
In the
past, these 3 distinct applications
required 3 distinct products to perform
all three functions mentioned above. Also, due to the ambiguity of
naming, some guitarists would end up
buying a treble booster, when what they
really wanted was a flat booster and
vice versa. "A booster's a booster
right?!" Wrong!
I wanted
to create one pedal that would perform all of
these functions. But this then led to a
whole bunch of questions.
- What
should the input impedance of the
buffer be?
-
Should it be variable?
-
Should there be input and output
sensitivity controls?
-
Should the control for switching
from flat to treble booster change
the gain as well?
-
Instead of a switch, should there be some kind of
control to morph from flat to
treble?
- What
about dedicated low and mid
controls?
-
Should the low and high controls be
roll-off controls or shelving EQs?
-
Active or passive?
- If
we add all this electronics in
there, will it get too noisy?
My
initial prototypes were very
complex (as you can gather from
this rather disturbing insight into
my thought processes). But despite
all the flexibility of the original
prototypes, there was something
missing. It seemed as if in adding
all these configurable parameters, I
ended up ruining the original idea
of the pedal. There was so much
circuitry in the pedal that noise
was starting to become significant.
There were also so many EQ controls
that it was actually difficult to
dial in a flat response. At unity
gain, you could hear the tone change
and it was difficult to 'dial out.'
I had
to come up with a different
approach. Unlike my other designs,
adding an extra knob, switch or
trimmer was not going to make things
better. It would only make things
worse. And then one day, a design of
stunning simplicity and utilitarian
elegance came to me.
Here it is!
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