Q-tron Audio PRE14B4 Manuale utente
Q-tron Audio
Q-tron Audio Manual PRE14B4R2 Page 1(5)
Q-tron Audio PRE14B4 Pre-amplifier
user manual
Q-tron Audio
Q-tron Audio Manual PRE14B4R2 Page 2(5)
INTRODUCTION..................................................................................................3
CONTENT OF DELIVERY....................................................................................3
UNPACKING ........................................................................................................3
SETUP..................................................................................................................3
FUNCTION...........................................................................................................3
CONTROLS AND CONNECTORS.......................................................................3
Front panel....................................................................................................................................... 3
Back panel....................................................................................................................................... 4
REMOTE CONTROL............................................................................................4
PERFORMANCE DATA:......................................................................................4
CONTACT INFORMATION...................................................................................5
Q-tron Audio
Q-tron Audio Manual PRE14B4R2 Page 3(5)
Fig 1 Front view
Introduction
PRE14B4 is a pre-amplifier with low output impedance and very high transparency, 4
select-able inputs and a relay-switched volume control built with discrete resistors
Content of delivery
1. Amplifier PRE14B4
2. Remote control
Unpacking
Put the box on a table or other steady surface. Open the box and put the amplifier on a
steady surface with the front panel facing towards you.
Setup
Connect the amplifier to the mains voltage with a standard IEC 320 mains cable.
Connect signal sources to the connector inputs.
Connect a power amplifier to the connectors marked output.
Q-tron Audio
Q-tron Audio Manual PRE14B4R2 Page 4(5)
Function
The amplifier is equipped with RCAphono and XLR connectors for input and output
signals. The active circuit in the amplifier is powered by an advanced power supply with
controlled start-up sequences to prolong the tubes’ life and avoid any voltage transients
on the output.
Start-up procedure
Switch on the mains and switch on the back panel to position 1. Push the front panel
push button, and after a few seconds, the display will be lit. After 60 seconds the area
around the front panel push button will be lit green and the amplifier is then ready for
operation.
Controls and connectors
Front panel
On-switch with an integrated on indicator, this is a switch button which when pushed in
will start the switch-on sequence of the amplifier.
Combined volume control and channel selector knob. The volume level is controlled by
turning the knob and the channel is changed by pushing the knob slightly inwards.
Volume and channel can also be controlled remotely.
Indicator display. This display indicates volume level from 0 to 64 where 0 is the lowest
volume and 64 is the highest volume. When a channel is changed either by pushing the
control knob or by the remote control the channel is shown momentarily from C1 to C4
Back panel
Input connectors left and right
Connectors marked 1 and 2 These connectors accept standard XLR male plugs
Connectors marked 3 and 4 These connectors accept standard RCA phono plugs
Output connectors left and right
Connectors marked 1 These connectors accept standard RCA phono plugs
Connectors marked 2 These connectors accept standard XLR female plugs
Mains power inlet with integrated fuse holder and mains switch.
Q-tron Audio
Q-tron Audio Manual PRE14B4R2 Page 5(5)
The power inlet accepts a standard power cord with an IEC320 plug. The 2 mains fuses
can be accessed if the power cord is removed and the fuse cover/holder is removed,
replace the fuses only with fuses of the same rating, (for 230VAC mains power fuse
rating is 2A slow blow and for 120VAC mains power fuse rating is 4A slow blow). The
mains switch to power up the amplifier is set to position 1, and in position 0 the amplifier
is disconnected d from mains power.
Remote control
The remote control can be used to adjust the volume or to change the channel, there is
also a muting function where the volume can be toggled between the actual setting and
0 and back again. To increase/decrease volume push on the upper or lower part of the
large black circle. To change the channel push the right or left part of the large black
circle. For muting push the centre button in the large black circle.
Q-tron Audio
Q-tron Audio Manual PRE14B4R2 Page 6(5)
Performance data:
Gain 14dB, (5 times)
Channel balance difference when adjusting volume +- 0.05dB
Input impedance 40 kohm
Output impedance 1k ohm
Harmonic distortion, (THD) <0.001% at 1kHz at 1V out
balanced mode, 100kohm
load
Frequency response 5 - 100kHz - 1dB
Noise and hum 100 dBA below 1 V out
Volume control 64 1dB steps
Mains voltage 230V ± 10%
Power consumption 100W max
Dimensions 430 x 110 x 370 mm,
(W x H x D)
Input connectors Gold plated RCA phono,
2 inputs
Gold plated XLR, 2 inputs
Output connectors Gold plated RCA phono,
1 output
Gold plated XLR, 1 output
Mains connector IEC320 socket with
integrated Power switch
Remote Control function Volume level, input channel
selection, mute
Weight 13kg
Contact information
Manufacturer Q-tron Audio Sweden
www.qtron.se [email protected]e
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