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We recommend using George Dennis speaker cabinets. These bass cabinets utilize special Celestion
loudspeakers and guarantee clear sound projection. Moreover, these cabinets are made of 13 – ply birch
plywood and are fitted inside with vertical sound wave breakers and padding. Cabinets come in three
versions:
GD115B, 300 W RMS, 1 x 15“ + Tweeter or GD 115BS (small version)
GD410B, 600 W RMS, 4 x 10“ + Tweeter
GD210B, 300 W RMS, 2 x 15“ + Tweeter
Tweeter can be switched off at will. Connecting jacks are 2 Neutrik Speakon.
Points about BIAS.
Our apms use power tubes which are always paired in selected quartets. BIAS varies in each individual
manufacturer of tubes, resulting in a different overall sound of an amp. We therefore recommend that a BIAS
tune up will be performed by a qualified technician. The BIAS tuning trim pot is located inside the chassis on
the main printed circuit board. !!! Never remove chassis with the power ON !!! The preamp uses 3 pcs of 12
AX 7 ( ECC 83 or 7025 ) which can be changed by the player without worrying about BIAS.
How do you begin.
1.
Prior to using the amp first check the correct voltage selection on the back panel ( USA, Canada, Japan
115 V, Europe and Britain 230 V ). Fuses should be selected according to the instruction on the back panel.
2.
Plug the power cord into a wall socket and connect the footswitch via supplied connecting cable
Jack-Jack to Footswitch on the back panel. Turn the Master Juice knob to a position 0 and switch the
POWER switch on the front panel to a position ON. Wait approx. 1 – 2 minutes and switch the STANDBY
switch to the position ON. Your amp is now ready to be used.
3.
The control knob WARM plus the entire MIDDLE control section can be switched ON and OFF at will by
the footswitch, which comes with every amp. However, to ensure a proper function of footswitch the control
switches on the front panel must be in position MIDDLE OFF and the one switching WARM in the position
NORMAL.
4.
To begin creating your sound we recommend you turn all the knobs on the front panel to position 5 and
the switches to position left or 1. As you proceed experimenting, don’t be afraid to use the extreme
positions of the knobs. Let your personal taste, not the knob positions, be the guide.
BASSIC TUBE 120 and 200 - front panel controls.
From left:
INPUT HI
– input for instruments not equipped with active electronics
INPUT LO
– input for instruments with active electronics
+6 dB
– in the position ON you obtain a 6 dB boost in input sensitivity in both inputs
GAIN
– preamp signal saturation control
BRIGHT
– boost of high frequencies in preamp
HEAT
– creation of warmer and gutsier sound
WARM
– switch placed after frequency controls, helps to obtain more saturated sound
BALLS
– more gain while bass frequencies are being more pronounced
CHOICE
– two types of sound color in bass frequencies
BASS
– bass frequencies control
INPUT
LO
HI
Bright
Normal
Warm
STANDBY
George Dennis Ltd.
MUTE
Choice
On
POWER
FILTERS
Off
Choice
Bright
ON
ON
ON
MASTER
JUICE
GAIN
MIDDLE
HEAT
BALLS
BASS
TREBLE
Choice
OFF
OFF
Fine
Soft
Extreme
+ 6 dB
OFF
On
OFF
ON
OFF
O N
OFF
ON
I
II
I
II
I
II
Содержание BASSIC TUBE 120
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