
About the Burnish Boost
The Burnish Boost is effectively a miniature class A amplifier with an output
transformer. It can generate approximately 18dB of clean boost before
clipping, depending on input levels.
A friend calls our EP-PRE a “Tone Polisher”. Our Burnish Boost is more a
burnishing tool for tone than a polisher. It leaves an impression on your tone
in the form of a mid presence boost, but not a mid hump. It also exhibits a
similar, but more pronounced Phase Response to the EP-PRE, giving it a full-
bodied sound.
The Burnish is a relatively clean boost, but, if you drive it hard enough it will
gradually be forced into soft, progressive clipping, in a similar way to a class
A Tube amp. There is none of the harsh clipping that is usually associated
with “transistor” amps. Running the Burnish Boost from an 18V supply will
increase headroom.
As with our EP range of pedals, in the Burnish, we have used isolated jacks,
twisted, shortest practicable path wiring and optimum grounding methods to
keep noise at a minimum. The PCB is made from high quality FR4 board
with a full ground plane.
Power Supply
The Burnish Boost is designed to operate from a 9V - 18V DC supply.
Maximum allowed voltage is 18V DC.
External Power Supply
Power can be supplied from a 9V - 18V DC regulated power pack with a
2.1mm coaxial plug with negative connected to the centre pin. Although the
Burnish Boost uses only 3-6mA, depending on voltage, the power pack
should be rated at greater than 20mA. Use only a REGULATED supply.
Some of the new switch mode supplies are not suitable for use with the
Burnish Boost, because they generate excessive electrical noise.
These power supplies may be marked “FOR ITE USE “. The pedal is
protected from reverse power connection by a diode, connected across the
positive and negative contacts of the DC jack. If an incorrectly polarized or
AC supply is connected, this diode will effectively short circuit the supply,
protecting the pedal circuitry from damage. If an incorrect power supply
remains connected, the power supply may be damaged.
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Battery
A battery compartment is provided for powering the pedal from a 9V battery.
If you use a battery, it should be replaced when the voltage has dropped to
8V
To access the battery compartment, peel off the non-slip base, which is
attached with genuine Velcro, commercial quality, hook and loop tape.
Remove the four screws that hold the bottom of the box in place.
The battery snap is held to the inside of the box with Velcro. Separate the
Velcro and attach the snap to the battery. The battery will fit sideways
between the switch and the end of the box. The pedal serial number is also
located in this area.
Replace the bottom of the box and the non-slip base. Note: The bottom of
the box has foam rubber on the inside, but the rubber does not cover the area
where the battery sits. If the bottom is the wrong way round, it won’t fit over
the battery.
Using the Burnish Boost
Foot Switch
The switch is 3PDT, True Bypass and has gold contacts for reliability.
Note: The switch can assume a “half-operated” state if the plunger is
bumped during travel and set-up. This is a characteristic of the gold contact
switch mechanism and not a fault. Always fully operate the stomp switch
once before using the pedal.
Level Control
The Level control adjusts the output of the Burnish Boost from zero to full
output.
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