Amptweaker FatRock User manual

Welcome! Thanks for purchasing your FatRock™
pedal, another Amptweaker™ handmade product
designed with your advice. The FatRock is based on
consumersʼrequests for a warmer version of our
popular TightRock™ distortion pedal. It ranges from
moderate to high gain distortion with built-in noise gate,
gain boost and PlexEQ switches and it has SideTrak, a
second effects loop that works when the pedal is OFF.
Keep those ideas coming!
Cool Ideas:
•True Bypass switching–buffered when pedal is ON
•Tight Attack control lets YOU dial in the chunk
•Gain, Volume, & Tone with Gain and PlexEQ switches
•Noise gate threshold automatically tracks gain control
•Pre/Post selectable Effects Loop-tracks Bypass Switch
•SideTrak™ Loop comes on when pedal is OFF
•Battery On/Off switch with red ʻDonʼt Forgetʼindicator
•LED lit knobs when using a DC adapter
good tone comes from tweaking ...
TM
James Brown,
Amp Engineer
Welcome! Thanks for purchasing your FatRock™
pedal, another Amptweaker™
designed with

How does the work?
Noise Gate–
reduces noise,
adjusts
threshold
automatically
with gain
adjustment
Tone–EQ,
shelves
highs up
and down
to balance
with lows
Volume–
a Master
Volume,
set for
boost or
balance
with
bypassed
levels
Output
Jack–
connect to
the next
pedalʼs
input or
amp
Tight– set
higher for an
aggressive,
chunky attack-
lower for thick,
fatter distortion
True Bypass
Switch–directly
connects Input
Jack through the
SideTrak loop to
the Output Jack.
SideTrak Loop- this
loop is active when the
FatRock is bypassed.
Send to ʻclean effectsʼ
Input, Return from ʻclean
effectsʼOutput. See back
page for other ideas.
Input Jack–from
guitar or previous
effect. The battery
disconnects when
unplugged
PlexEQ–sets
EQ to vintage
stack tone
Gain & Boost SW–
controls amount of
distortion: vintage
gain with Boost out
and Gain low, and
modern high-gain
tones when cranked!
DC Jack– use
regulated 9V–
18VDC supply
with center pin
grounded–9V
sounds like a
50W amp tone
while 18V is a
cleaner, louder
100W tone.
Like a variac!

Amptweaker, LLC
5885 Cumming Hwy, Suite 108-98
Sugar Hill, GA 30518
handmade in USA
www.amptweaker.com
©2013 Amptweaker, LLC
Battery Door–
The battery
door is held
closed by a
magnet, and
can be opened
just by pulling
sideways
EFX Loop Switch–selects Pre(before) or
Post(after) position for the Loop. Usually
Compressors sound best on Pre, while
Delays & Reverbs sound better on Post
LEDs–light up
the knobs if an
adapter is used
Battery Switch–
This switch turns
off the battery
when not in use-
not active when
using an adapter
Specs:
•Input impedance: 100K Ohm (effect on)
•Output Impedance: 1K Ohm (effect on)
•Current: 12mA with 9V battery, 28mA with 9V adapter, 45mA with 18V
adapter (adapter adds knob LEDs)
•Adapter: 9-18VDC adapter w/5.5mm X 2.1mm positive barrel center ground
•Housing: 14 Gauge galvanized steel
•Weight: 2 pounds, Dimensions: 3.75”W X 5”D X 2”H
Effects Send & Return– Itʼs
easy to create your own effects
chains using this series loop–
and the added effects track the
FatRockʼs On/Off Switch

TM
good tone comes from tweaking . . .
DELAY
GUITAR
IN
OUT
IN
OUT
CHORUS
GUITAR
DELAY
GUITAR
IN
OUT
IN
OUT
EQ
GUITAR
SideTrak™
3 Channels–FR ON = Lead,
TD ON + FR OFF = TD Crunch Rhy.
TD + FR OFF = Clean
Dual Effects–FR has Delay
only, clean has Chorus only
Fix Clean Tone–The EQ only
works on Clean, so the amp
tone can be right for FR
Dual Amps–FR goes to black
amp, clean goes to tweed, may
need ground lift on 1 amp only