
OPERATING MANUAL
Qube-300
LassC
D
Taurus
Box Electronics
ul Cieszyńskiego 4
81-881 Sopot
Poland
tel +48 58 550 66 46
tel/fax +48 58 551 90 05
e-mail info@taurus-amp.pl
www.taurus-amp.pl
Bass guitar
amplifier
Qube-300
RoHS
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Union and other European countries with separate collection programs)
This symbol, found on your product or on its packaging, indicates that this product should not be treated as
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will helpprevent potential negative consequencesto the environmentand human health, which could otherwise
be caused by inappropriate disposal of this product. The recycling of materials will help to conserve natural
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household waste disposal service orthe retailstore where youpurchased thisproduct.
DESIGNED BY MUSICIANS FOR MUSICIANS

Dear bass player! You have one of the smallest and the most
effective amplifiers as well from the sign of Taurus. We hope that
this gear will come up to your expectations.
Taurus Qube − 300 bass head is the smallest and the lightest bass
amplifier in Taurus's amps line. The compact size of the head was
attained by applying the newest, most advanced technology.The
SMPS (Switch Mode Power Supply) power supply and Class D
power amplifier in conjuction with classic analog pre−amp provide
great efficency, power, dynamic and sound selectivity . As all
Taurus amps, the Qube − 300 is very easy to operate.The MLO
system equalization control in which the Qube is equipped with,
achieves easy and intuitive tailored sound using only bass and
treble potentiometers.This sound correction simplifies finding the
right tone colour of an instrument.
6
A
Connect a cabinet of the proper power and impedance to the amplifier, see
page 5 in theoperation manual.
It's recommended to connect 4 ohm cabinets with Speakon−Speakon
cable. This link warrants better connection quality and reliability then
Jack−Jack cable.
B
Set every front panel controllers and switches on following positions:
− GAIN, BASS, MIDDLE, TREBLE controllers in middle position,
− Tone switches in middle position.
C
Connect your bass guitar to one of the inputs Active or Passive depending
on your instrument, then turn the power on.
D
Turn on the Volume in optimal position, then you can start playing if your
gain level is too small, set the gain knob to desired level. Don't let the
preamp to be distorted by setting to big gain level.
E
Next step will be creating your sound colour using controllers and
switches available on the front panel.
7
GETTING STARTED
PRECAUTIONS
MLO − SYSTEM
The “MLO” (Mid Level Optimization) is Taurus proprietary system allowing
for an easy, intuitive and extremely comfortable optimization of the overall
sound of the bassguitar.
The MLO System provides all new possibilities. It ensures most accurate
proportion of medium frequencies in accordance of your manual settings
of bass and trebles. This very intuitive and logical system supports
musician's choice for most desirable sound.
In addition, the MLO equalizer ensures virtually no change in overall volume
while changing the bass frequencies. Unlike most of the standard amps,
adjusting bass frequency the musician notices change of the sound not the
volume.
Middle−range Level Optimization
− 1 −
CAUTION! It is necessary to comply with basic rules while using devices
supplied from AC power.
The device should be supplied with current of parameters complied with
markings on the product.
It is recommended to use plugs with grounding. Without grounding while
touching and adjusting metal knobs of the amplifier, small crackling can be
audible.
Use fuses of parametersrecommended bythe producer only.
Protect the device againstmoisture.
A perfusion ofthe devicemay cause damage orelectric shock.
The amplifier should be place in a spot that anables free air circulation for
the cooling system towork properly.
The device should beused awayfrom a heat sources.
It is necessary to remember that too loud play may cause hearing
damages.
Never try to repair thedevice personally.
− 6 −

FEATURES MAIN FEATURES
Power output:
300W RMS/4ohm,
200W RMS/8ohm,
INPUTS
GAIN
VOLUME
TONE:
BASS, MIDDLE, TREBLE MLO
BASS, TREBLE t .
PUNCH
MUTE
PROTECTION indicator.
CLIP
Protections: Short circuit, thermal overload, power overload.
Casing dimensions: [W x S x G] 66 x 200 x 155 mm
Overall dimensions: [W x S x G] 66 x 190 x 180 mm
Weight: 1,7kg
HEAD AND SPEAKER CABINETS CONFIGURATION
5
: active and passive.
control.
control.
one switches
− increases sonic expression.
− button.
power amp control.
200W set
control with system.
300W set
450W set
14
GAIN True/Bost
MLO Equalizer
QUBE−450 QUBE−450QUBE−450
8ohm
Min. 200W/RMS
2 x Min. 150W/RMS
8ohm
8ohm
4ohm
Min. 300W/RMS
MUTE
DI−output
PUNCH
SPEAKON/JACK combo
− 2 −− 5 −

FRONT PANEL
OPIS EQUALIZERA PARAMETRYCZNEGO
32
REAR PANEL
VOLUME
3
2
3
10
1
MUTE
Bass Amplifier
Qube
54
6
8
MUTE
300
PROT
7
CLIP
MUTE
12 13 14
e
v
i
t
c
A
1
e
v
i
s
s
a
P
2
[1]
− Active
[2]
[3]
assive bass instrument INPUT
− P
− GAIN control − True/Boost “True” position (MIN) means that
GAIN BASS MIDDLE
3
2
3 4 6 8
1
PRE-CUBE
True Boost
SYSTEM
bass instrument INPUT
BASSGAIN TREBLEMIDDLE VOLUME
54
6
7
8
11
2
2
3
4
3
4
DBS
Punch Punch
5 7 9 11
11
2
2
3
4
4
A B
PUNCH
2
3
3
4
TREBL E
[JACK 6.3mm].
[JACK 6.3mm].
.
TREBLE
11
2
4
the instrument signal is not increased at input stage.
The signal is the same as the pickup and preamp output.
[4]
[5]
BASS control with MLO−system.
−
− Triple BASS − switch to reduce or boost low frequency
[DBS−cut/OFF/DBS−boost].
[6]
− MIDDLE control.
[7]
− PUNCH triple switch − High−Punch/off/Low=Punch
[8]
− TREBLE
[9]
− Triple TREBLE − switch to reduce or boost high frequency
CONTROL with MLO−system.
[CUT/OFF/PRESENCE].
[10]
− VOLUME control.
[11] −
[12]
[13]
[14]
MUTE on/off switch.
− ON/MUTE indicator
− Power amplifier CLIP indicator
.
.
− STANDBY and PROTECTION indicator
LED is illuminated when nothing is connected at the Amp
Input. If LED is illuminated when instrument is connected, the
Power Amp protection circuits are active.
− 3 −
Standby
PRO T
CLI P
ON
TEST
LIFTPOST
D.I.
4−8oh m
[1]
[2]
1
1
2
2
− Balanced LINE OUTPUT
− SPEAKERS output
3 4
3 4
PRE GND
450W/ 4ohm
300W/ 8ohm
Made in P oland
.
[XLR]
[combo SPEAKON and 6,3mm
POWER
5
5
Fuse: 3 .15A−230 V 6.3A−120 V
6
6
JACK]
.
4ohm − minimum impedance
It's recommended to connect 4 ohm cabinets with Speakon−
Speakon cable. This link warrants better connection quality
and reliability then Jack−Jack cable.
[3]
− LINE OUTPUT PRE/POST EQ switch.
[4]
− LINE OUTPUT GROUND LIFT switch.
[5]
− POWER switch.
[6]
EC POWER INPUT socket with AC fuse.
−
Fuse: 3,15A/230V
Fuse: 5,0A/120V
4
4
PROTECTIONS
This amp is armed with several Power Amp protection circuits. PROT LED
placed at front panel of the unit indicates their activity. If PROT illuminates
with constant light while instrument is connected, that means Power Amp
is blocked by PROTECT circuits. Temporary overload or short circuit at
Speaker Output will cause PA to be blocked for about 4 seconds. After this
time amp will start working again without any user action. If this kind of
situation occurs, cabinet connection and impedance should be checked
(lowest possible impedance is 4 ohms). If amp does not restart after 4
seconds, that may indicate Power Amp has overheated. It may take few
minutes before the cooling system will decrease temperature of PA to the
safe level.
− 4 −