Amptweaker Bass tight fuzz User manual

Welcome! Thanks for purchasing your Tightfuzz™
pedal, the first Amptweaker™ handmade product
desigded with your advice. The Bass TightFuzz is
based on consumersʼrequests for a more tweakable
fuzz box, with both Germanium and Silicon transistors.
Automatic biasing extends the range from very clean
tones to killer fuzz using a single Fuzz control. Keep
those ideas coming!
Cool Ideas:
•True Bypass switching–with special input circuitry,
works great with active pickups or other pedals in front!
•Dry Low control blends in dry lowend for big bottom
•Tight Attack control lets YOU dial in the chunk
•Fuzz, Volume, & Tone with 60ʼs-70ʼs Tone switch
•Germanium/Silicon output transistor switch
•Edge switch smoothes out the buzz
•Pre/Post selectable Effects Loop-tracks Bypass Switch
•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
Thanks for purchasing your new Bass TightFuzz™
pedal, another Amptweaker™
designed with

How does the work?
Transistor SW–selects Germanium(warmer) or
Silicon(brighter/higher gain) output stage transistor
Tone–EQ,
adjusts highs
up and down
to balance
with lows
Volume–
distortion
Volume,
set for
boost or
balance
with the
bypassed
levels
Output
Jack–
connect to
next pedal
IN or amp
Edge SW–
set to Smooth
for a softer
and less
buzzy tone
True Bypass SW–disconnects
all circuitry and directly connects
Input Jack to the Output Jack
Input Jack–from
bass or previous
effect. The battery
disconnects when
unplugged
60ʼs–70ʼs
Tone SW-
tweaks EQ
for bright
60ʼs or full-
range 70ʼs
fuzztones
DC Jack– use
regulated 9V–
18VDC supply,
center pin (-)
9V is the most
distorted, while
18V is cleaner,
and louder–
works better
for clean
boosting
Fuzz– adjusts
distortion, while it
automatically
adjusts bias for
better clean tones
Tight– set
higher for
aggressive,
chunky
attack or
lower for a
thicker, fatter
distortion
Dry Low–
blends in
clean
lowend
for fatter
bottom!

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 of the Loop. Usually
Compressors sound best on Pre, while
Delays or Chorusʼsound 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: 250K Ohm (effect on)
•Output Impedance: 1K Ohm (effect on)
•Current: 11mA with 9V battery, 22mA 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
Bass TightFuzzʼs On/Off Switch

TM
good tone comes from tweaking . . .
Amptweaker, LLC
5885 Cumming Hwy, Suite 108-98
Sugar Hill, GA 30518
Other Tips & Tricks:
•Effects like compressors, treble boosters, octavers, or
overdrives tend to work best in the Effects Loop, set to Pre.
•Effects like EQ, chorus, vibe, delay, reverb and most other
mod effects tend to sound best with the Loop set to Post.
•Add an overdrive/distortion pedal in the Effects Loop (set to
Pre) to tweak the Bass TightFuzz for more distortion and
sustain! The Dry Low will blend in the low part of the drive.
•Add a clean boost or EQ pedal in the Effects Loop (set to
Post) for more output level or to further tweak the fuzz tone.
•With higher Volume/lower Fuzz settings, the Bass TightFuzz
sounds like a small tube amp(with Tight DOWN, 70ʼs tone,
Smooth ON) or a treble booster(with Tight UP, 60ʼs tone).
•For the thickest, buzziest fuzz, use Silicon, 70ʼs, Edge OFF,
Fuzz turned UP and Tight turned DOWN. Dry Low to taste.
•Select Pre/Effects Send to use it as a switchable ʻcleanʼ
send to another effects chain, tuner input or second amp.
•Select Post/Effects Send to send to another amp AFTER
the Bass TightFuzz for a big stereo solo tone.
•When using extremely high settings on the Tight control,
you will likely need to increase your the Dry Low control.
handmade in USA
www.amptweaker.com
©2013 Amptweaker, LLC