TWEAKER-40 HEAD
50/60Hz 300 WATTS
1) COOL BLUE PILOT LIGHT: Tells
you the amp is ON and ready to rock.
2) ON/OFF SWITCH: Turns the main
power On and Off.
NOTE: The correct procedure for turning
ON and turn OFF is as follows: When first
powering the amp ON, always have the
STANDBY switch in the STANDBY posi-
tion. Turn the POWER switch ON. Wait
about 30 seconds or longer before moving
the STANDBY switch to PLAY. Reverse
this procedure when turning the amp OFF.
Turn the STANdbY off first, followed by
POWER off. By following these steps you
will help extend tube life by not “slam-
ming” the tubes with high voltage while
they are cold.
3) STANDBY/PLAY SWITCH: The
STANDBY switch has a couple of impor-
tant functions. First, it can help extend
tube life as we described above. The other
is so that your amp can be ready and
warmed up but not producing any sound
until you switch to PLAY. This is great for
set breaks or when the amp may sit idle for
a while and you don’t want to wait for it to
warm back up before playing.
4) CHANNEL 1 VINTAGE/MOD-
ERN SWITCH: The two switch settings
modify the power amp circuit from a fairly
“neutral” sort of response (not in a bad
way) in the vINTAGe setting, to a more
aggressive tone and feel in the MODERN
position by boosting the low and high end
just the right amount.
5) MASTER 1: Adjusts the loudness of
CHANNEL 1.
6) CHANNEL 1 ON LED: Tells you
CHANNEL 1 is active.
7) CHANNEL 2 VINTAGE/MOD-
ERN SWITCH: The two switch settings
modify the power amp circuit from a fairly
“neutral” sort of response (not in a bad
way) in the vINTAGe setting, to a more
aggressive tone and feel in the MODERN
position by boosting the low and high end
just the right amount.
8) MASTER 2: Adjust the loudness of
CHANNEL 2.
9) CHANNEL 2 ON LED: Tells you
CHANNEL 2 is active.
10) BRIT/AC/USA SWITCH: This is
a really cool feature. Partly where the
TWEAKER got its name. This magical
switch lets you instantly select any one of
the three “classic” tone control circuits that
are quite familiar to all of us. The USA
setting duplicates the classic American/
California so revered in those “Blackface”
amps. The BRIT settings conjures up the
stronger lower midrange girth of the Brit-
ish amps. The AC setting creates a unique
voice that lives in the world of alternate
British amps whose three letter name
begins with V and ends in X. Use this
switch along with the tone control knobs to
create a never ending palette of classic and
unique tones.
11, 12 & 13) TONE CONTROLS: Pretty
self-explanatory. The Tweaker-40 features
the familiar passive tone control designs
of many revered classic tube amps. Dial
in beautiful, pristine clean sounds to bold,
powerful overdrive tones. You’ll find a
vast array of stellar sounds. Don’t hesitate
to turn the knobs. Let your ears create the
tones, not your eyes.
14) CHANNEL 1 TIGHT/DEEP
SWITCH: This switch is really useful for
tightening up the low end,
especially when pushing the gain. It works
by cutting the deep bass at the beginning
of the preamp. Setting the TIGHT switch
to “tight” will result in a clearer, more
defined tone. The “deep” setting retains a
full, big low end that is great for a really
robust, fat rhythm sound.
15) CHANNEL 1 HOT/CLEAN
SWITCH: In the CLEAN setting, the
gain is reduced to make is easy to dial in a
pristine clean to moderate crunch with the
GAIN knob. HOT unleashes the fury for
high gain rock or singing solos.
16) CHANNEL 1 BRIGHT/NORMAL
SWITCH: As expected, the BRIGHT
setting boosts the high end. Do experi-
ment with different combinations of the
BRIGHT on and TREBLE knob down
compared to the BRIGHT off and the
TRebLe up. You will find that with the
BRIGHT on and the TREBLE down, the
tone will be a little less midrangy com-
pared to the BRIGHT off and the TREBLE
turned up.
17) NORMAL/MID CUT SWITCH:
In the NORMAL setting, the midrange
is, well, normal. The MID CUT on opens
a whole new range of tones to further
expand your “tonal palette”. Try using
the MID CUT with your clean sound to
create a pristine, almost acoustic tone or
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