popular A3 User manual

Vacuum Tube Amplifier
POPULAR® A3
(User's Manual)
Date of last revision: 16.2.2015

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Contents
Acknowledgement....................................................................3
Important notice ......................................................................4
Safety Instructions....................................................................5
1. Front panel of the amplifier .................................................8
2. Rear panel of the amplifier...................................................9
3. After unpacking the amplifier ............................................10
4. Connecting the speakers ....................................................11
5. Connecting the turntable ...................................................12
6. Connecting the CD player...................................................13
7. Connecting the AUX device ................................................14
8. Connecting the TAPE/EQ device.........................................15
9. Connecting the Bluetooth device.......................................17
10. Putting the amplifier in operation....................................18
11. Technical parameters .......................................................20
12. Solving the possible problems..........................................21

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Acknowledgement
We appreciate that you have just selected the
POPULAR® A3 amplifier. We believe that you’ll be satisfied
with its bringing the joy of vacuum tube sound, which is very
popular even after so many years. It is due to a vacuum tube
principle itself, which provides the sound with fullness,
freshness and pleasant feeling of warmth.
On behalf of our company we thank you for your
expressed confidence.

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Important notice
You have got an electrical device working with the
dangerous voltage and therefore please, read carefully the
following pages and thoroughly observe instructions of this
User Manual!!!
The manufacturer is not responsible for property damages
or personal injuries caused by operating the unit in way
nonconforming to the User Manual instructions.

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Safety Instructions
1. The amplifier is intended to operate in a dry interior
with temperature range of 0°C to 40°C.
2. The amplifier SHOULD be protected against the
water, or its sources. It means that amplifier shouldn’t
be located near the water pipeline, bathtub, wash-basin,
washing machine, pools, and so on.
3. The amplifier as well as its ventilation holes MUSTN’T
be covered by ANY material except for the original
cover delivered by manufacturer, because the amplifier would
be overheated or even fire could occur eventually.
4. You shouldn’t enter into the amplifier and its
ventilating holes by ANY subject. Therefore keep the
amplifier beyond reach of children.

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5. In case of fault bring the unit into a certified service
or directly to the manufacturer eventually. In any case
don’t try to repair device by yourselves.
6. During operation of the amplifier its vacuum tubes
are of high temperature and there is a danger of
serious burn injuries. Keep the amplifier out of reach of the
children.
7. Carry out the exterior cleaning of the amplifier each
time only after disconnecting the power supply cable.
If the amplifier is operating, switch it off using the power
switch, disconnect the supplying cable and wait until complete
cool down of amplifier! Don’t clean using the chemicals and
organic solvents. It is sufficient to use a gently moistened cloth
made of micro threads. After wiping, the amplifier may be
switched on only after proper drying up.

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8. For powering use delivered mains EURO cable. The
amplifier is designed for the 230V/50Hz electrical
power network with protective PE conductor. In any case don’t
connect the amplifier to sockets without the middle earthing
plug, or otherwise disconnect the protective PE conductor!
9. Before first putting the amplifier into operation
please, follow the instructions in User Manual.
10. In case of any comments please, contact us on e-
mail address [e-mail]

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1. Front panel of the amplifier
1. Volume –serves for adjusting the total volume of amplifier, 2. Channel change-over switch –used for selection of audio input required.

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2. Rear panel of the amplifier
3. Turntable earthing terminal, 4. Input of turntable, 5. Input for CD player, 6. Input for AUX device, 7. BYPASS change-over switch, 8. Input for connection of output from TAPE/EQ device, 9. Output to the input of TAPE/EQ device, 10. Terminals of speaker (left channel), 11. Terminals of speaker (right channel), 12. Feeding EURO connector, 13. Main switch Prav

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3. After unpacking the amplifier
After unpacking the amplifier please, check whether
the EL84 and ECC83S vacuum tubes are at the right locations,
and pushed into place rightly. Eventual insufficient pushing
into position can be caused by transport. Use a dry cloth and
using the soft circular motions push the vacuum tube into its
place.
Note: Don’t try to push the vacuum tube applying perpendicular force
downward, because feet used are very rigid in order to reach a quality
coupling. A gentle circular motion downward facilitates this
operation and you don’t risk any damage of the vacuum tube.