Amptweaker BigRock Pro User manual

Cool Ideas:
•Dual illuminated Boost controls via Boost footswitch
•3 band EQ, with Smooth Edge and PlexEQ switches
•3 effects loops, Universal, Boost, and SideTrak loop
that works when the pedal is OFF!
•Noise gate with internal adjustments, tracks gain
•Mid Boost switch tweaks Boosted tone to cut through
•Internal Fat switches for warmer Rhythm and/or Boost
•Pre/Post select switches for Universal and Boost Loops
•Can be used as a preamp, or into clean channel
•Runs on 9V-18V, like changing from 50 to 100W amp!
•LED lit knobs when using an adapter
Welcome! Thanks for purchasing the BigRock Pro™
pedal, the first Amptweaker™ handmade product
designed with your advice. This version of our very
popular TightRock™ & FatRock pedals has a dual
boost system, 3 effects loops, & added 3 band
EQ...which helps get even heavier tones not
available with the standard versions. Keep the
ideas coming!
good tone comes from tweaking ...
TM
James Brown,
Amp Engineer
Welcome! Thanks for purchasing the BigRock Pro™
pedal, another Amptweaker™
designed with

How does the work?
Volume-
Master
Volume,
for overall
volume
SideTrak Loop– This loop
is active when the BR Pro
is bypassed. Send to
ʻclean effectsʼIn, Return
from ʻclean effectsʼOut.
True Bypass
Switch–directly
connects Input Jack
through SideTrak
loop to Output Jack
Input Jack-
from guitar or
previous pedal
-Battery(s)
disconnected
if unplugged
Mid
Boost–
active
with
Boost
Foot
Switch DC Jack- 9-18
VDC regulated
supply, center
pin ground(-).
9V is like 50W
amp, 18V is
more dynamic
like 100W amp
Output
Jack–
connect
to next
pedalʼs
input or
amp
Gain- adjusts distortion,
switch sets gain, ON for
modern, OFF for vintage
Tight– set high for
aggressive, chunky
attack, low for thick
fatter distortion. Two
Fat switches inside!
PlexEQ & Smooth Sw–PlexEQ tweaks mids
& edge for stack tones, Smooth warms highs
Gate–cuts
noise, and
tracks gain
control.
Internally
tweakable
3 Band
EQ– very
flexible for
rock, and
even some
metal
Boost Footswitch–
adds Gain & Volume
boost knobs, Boost
EFX Loop, Mid
Boost switch, and
internal Fat switch

LEDs–light up
the knobs if an
adapter is used
Battery
Switch– This
switch turns
the battery(s)
off when not in
use. No need
to unplug the
input..disabled
when using an
adapter
Specs:
•Input impedance: 240K Ohm (effect on)
•Output Impedance: 1K Ohm (effect on)
•Current: 18mA with 1 or 2-9V batteries, 22mA with 9V adapter, 24mA with
18V adapter(adapter adds knob LEDs)..internal switch disconnects 1-9V
battery clip. Keep battery clips taped when not in use
•Adapter: 9-18VDC adapter w/5.5mm X 2.1mm positive barrel center ground(-)
•Housing: 14 Gauge galvanized steel
•Weight: 3 pounds, Dimensions: 5.625”W X 5”D X 2.125”H
©2014 Amptweaker, LLC, 3482 Keith Bridge Rd, Box 345
Cumming, GA 30041
handmade in USA www.amptweaker.com
Universal Effects Loop-
effects in this series loop
are always active when
the BigRock Pro is On.
A switch on the bottom
positions this loop before
or after the distortion.
Battery Door–The battery door is held closed by
magnets, and opens just by pulling out... with no tools
needed! An internal switch allows using 1 or 2 batteries.
Boost Loop– this effects
loop is only active when
the Boost Ftsw. is selected

TM
good tone comes from tweaking . . .
EFX Loop Pre/
Post Switches-
puts loops before
or after the BRP
9V-18V Battery
Switch-set to 9V when
using 1 battery to
disable one terminal
Hidden Tweaks under the battery compartment
Fat Rhythm/Fat Boost Sw-for an even
fatter attack on Rhythm and/or Boost
Extra Gate- turn clockwise
for even more noise gating
Main Gain-Tracking
Noise Gate- clockwise
to increase gating effect,
down to reduce gate
DELAY
GUITAR IN
OUT
NORMAL: BRP has
EQ always, adds
Delay when Boost
ON, Chorus only
when bypassed.
IN
OUT
EQ
SideTrak™
CLEAN
EFX
DUAL AMPS:
Take Chorus
OUT to 2nd
ʻCleanʼamp
instead of RET
of SideTrak, for
dual amp A/B
CLEAN FX IN ST:
Clean pedal or
preamp, only works
when BRP is OFF
IN
OUT
CHORUS