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Introduction
Thank you for purchasing a qualiton A50i power amplier!
It is designed to deliver a high standard of musical performance. The
innovation in engineering and manufacturing this product guarantees
amusement for a long time, thanks to the output transformer made by us.
We wish you many pleasant hours of musical experience with your
qualiton A50i!
CONTENTS
PREFACE .............................................................................................................................................. 2
CONTENTS OF PACKAGE ................................................................................................................ 3
TECHNICAL SPECIFICATION ........................................................................................................... 4
FRONT PANEL CONTROLS ..............................................................................................................5
REAR PANEL TERMINALS ............................................................................................................... 6
INSTALLATION ................................................................................................................................... 7
SAFETY RECOMMENDATIONS - PLACEMENT ............................................................................ 8
SAFETY RECOMMENDATIONS - OPERATION ............................................................................. 9
FIRST INSTALLATION .......................................................................................................................11
CONNECTING ..................................................................................................................................... 12
STATUS INDICATION ......................................................................................................................... 13
REMOTE CONTROL STATUS INDICATION .................................................................................... 13
REMOTE CONTROL ........................................................................................................................... 14
REPLACEMENT OF BATTERY .......................................................................................................... 14
VACUUM TUBES ................................................................................................................................. 15
REPLACEMENT OF VACUUM TUBES ............................................................................................ 16
TROUBLESHOOTING ......................................................................................................................... 18
MARKINGS .......................................................................................................................................... 20
WASTE MANAGEMENT ....................................................................................................................21
WARRANTY ......................................................................................................................................... 22
DECLARATION OF CONFORMITY ................................................................................................... 23
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Before installing the stereo power amplier qualiton
A50i, please study this user manual carefully!
Operating your power amplier in a manner it is designed for ensures you an utmost musical experience and a reliable operation.
If you have any questions on our products or services, please do not hesitate to contact us on our
website www.audiohungary.com
PREFACE
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!
- 1pc qualiton a50i stereo amplier
- 1pc user manual
- 1pc standard mains cable
- 1pc remote control
- 1pc torx wrench (TX08)
- 1pc A23 battery
CONTENTS OF PACKAGE
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NOMINAL OUTPUT POWER
2 X 50W Stereo (measured by 1 kHz sine wave; THD < 0,75%)
TOTAL HARMONIC DISTORTION
< 0.75% (f = 1 kHz - measured at maximal output power)
FREQUENCY RESPONSE
30 Hz - 70 kHz (-3 dB, measured at maximal output power)
INPUT SENSITIVITY
425 mV asymmetric input
GAIN
+33.5 dB (8 Ω); +25.5 dB (4 Ω)
INPUT IMPEDANCE
10 kΩ
NOMINAL LOAD IMPEDANCE
4 Ω and 8 Ω
OUTPUT POLARITY
non inverting
SIGNAL - TO - NOISE RATIO
> 95 dB
POWER CONSUMPTION
300 W
VACUUM TUBE SET
4 x KT120; 4 x E88CC; 2 x ECC83
WEIGHT
25 kg
TECHNICAL SPECIFICATION
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3
1 2 4 5
FRONT PANEL CONTROLS
1
2
3
4
Main switch
Input selector rotary switch
Volume control
Status indicator LED
5
LEDs indicating active input
qualiton A50i
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1 9 10 112 3 4 12 13
!
8765
REAR PANEL TERMINALS
Line input (symmetric)
(1pc mini XLR) - Left side (L)
Line input (asymmetric)
(3pc RCA) - Left side (L)
Output - Right side (8 Ω)
Line output (asymmetric)
Output - Right side (4 Ω)
Output - Right side (0 Ω)
Output - Left side (0 Ω)
Output - Left side (8 Ω)
Output - Left side (4 Ω)
Built-in fuse box in the AC socket
AC socket
Line input (symmetric)
(1pc mini XLR) - Right side (R)
Line input (asymmetric)
(3pc RCA) - Right side (R)
1
2
3
4
5
6
7
8
9
10
11
12
13
qualiton A50i
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- Due to the vacuum tube construction of the amplier,
it may heat up during use. Thus, choose a location for
installation where the appliance can be well ventilated!
- Make sure that cables connecting the amplier to the
speakers as well as cables connected to the ports of
the amplier can be effortlessly connected!
- Appliance can only operate with 50Hz frequency and
230V AC voltage. The standard AC socket and the
fuse box are placed at the rear panel.
- Never operate the amplier through an ungrounded
outlet!
- The amplier can be connected to an audio system
through RCA or mini XLR ports placed at the rear
panel.
- According to the nominal impedance of the speakers
used, the amplier outputs are speaker ports marked:
0 - 4 - 8 Ω
- With the input selector rotary switch, the chosen input
source can be activated. The activated source is indicated by illuminated LEDs, from the left to the right in
order: LINE 1; LINE 2; LINE 3; LINE 4
- Never operate the amplier without a sufcient load!
Do not power up the amplier until correct loads (4 or
8 Ω) are connected to the output ports!
INSTALLATION
!
!
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200 mm
200mm 200mm
- Avoid relocating the appliance from cold to warm
surroundings! Sudden temperature changes can
lead to moisture condensation! Please wait until
moisture is evaporated before putting your amp-
lier into operation!
- The aforesaid applies to the very rst installation
of the amplier as well. Prior to the rst installation, leave the amplier at its place of operation at
least for 2 hours!
- The appliance is designed for indoor use. Do not
operate it in wet, humid surroundings!
- Do not store any electrical device or object in a pe-
rimeter of 200 millimetres around your amplier!
- The ventilation holes of the amplier must not be
covered (by tablecloth, curtain, newspaper, book,
etc.)! Impaired ventilation can lead to overheating
and irregular operation conditions!
- Do not use the appliace next to heating sources
and radiators! Keep it away from hot or dusty en-
vironment and ame!
SAFETY RECOMMENDATIONS - PLACEMENT
!
qualiton A50i
!
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- Improper installation may cause breakdown!
- Before powering up your amplier, make sure
cover, ports, plugs and cables are checked for
intactness!
- You must not start up damaged or faulty appliance! In case of any malfunction, unplug your
amplier immediately!
- Components must not be changed or repaired
by the user! In case of a malfunction, the cover
must not be opened or removed!
- In case of an emergency, unplug your amplier
immediately!
- In case of a faulty operation, contact our service!
- Improper repair may lead to a loss of warranty!
- The appliance may only be used by qualied
adults or children above 14 years of age if super-
vised by a qualied adult!
- Keep the appliance out of the reach of children!
- Make sure your domestic animal does not lie or
sit on the top of the appliance!
- Irrespective of protection circuits built in in your
amplier, always make sure it is connected and
operated in a proper manner!
SAFETY RECOMMENDATIONS - OPERATION
!
!
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- At the mains cable and output ports, there is no
risk of electric shock. Nevertheless, the appliance must be handled with care!
- If you do not use your amplier for a long time,
unplug the appliance carefully!
- Do not block the openings of your amplier since
this may lead to re or electric shock!
- The protection rating of this appliance is IP20.
This means the appliance is protected from solid
objects larger than 12 millimetres. However, it is
not protected from moisture!
- Operation voltage is 230V AC, operation frequency is 50 Hz!
- Never operate the amplier through an ungrounded outlet!
- The AC socket features a built-in fuse box. Ensure replacement fuses with rating T 6.3 L (type
time-delay, low breaking capacity).
SAFETY RECOMMENDATIONS - OPERATION
!
qualiton A50i
!
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- Be careful with appliance cables! Do not lead
them across sharp surfaces, do not clamp them
together and do not leave them in a hanging position!
- You must not operate the appliance with damaged cables!
- In case of re, you must not use water to extinguish the re, even if the amplier is powered
down!
- Never touch the appliance or its mains cable with
wet hands!
- Clean the appliance with a dry cloth while it is
unplugged!
- Never operate the amplier without a sufcient
load! Do not power up the amplier until correct
loads (4 Ω or 8 Ω) are connected to the output
ports!
- Connect your amplier to the other elements of your
sound system according to the connection diagram!
- Plug in your appliance!
- Switch the main switch on the left to the position ”l”
and wait for for the LED under the volume control
to turn from red to white.!
SAFETY RECOMMENDATIONS - OPERATION FIRST INSTALLATION
qualiton A50i
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8Ω / 50W
+
-
Made in Hungary
Model: SV40
8Ω / 50W
+
-
Made in Hungary
Model: SV40
CD PLAYER
(OPTIONAL)
(OPTIONAL)
SZIMMETRIKUS
BEMENETI
ESZKÖZ
MAGNETOFON
(OPTIONAL)
TURNTABLE
(OPTIONAL)
MM PICKUP
RECORD PLAYER
(OPTIONAL)
REC
TURNTABLE
(OPTIONAL)
MC PICKUP
SV 40 SPEAKER (OPTIONAL)!
qualiton A50i
POWER SUPPLY (OPTIONAL) qualiton PHONO RIAA (OPTIONAL)
SV 40 SPEAKER (OPTIONAL)!
!
CONNECTING
The diagram applies to
connecting 8 Ω speakers.
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- The status indication LED is placed at the front panel,
under the volume control. The LED can indicate the
followings:
- No illumination:
Appliance powered down.
- Turning from red into white light:
Current ows through the vacuum tubes, according to
the anode current value set by the manufacturer.
- Continuous red light:
Appliance is muted.
- Vibrating white light:
Radio communication (receiving signals coming from
remote control)
- Vibrating red light:
Radio communication (while the amplier is muted)
REMOTE CONTROL STATUS INDICATION
- During adjusting volume, the LED indicating
communication is illuminated white.
- After pushing the button ”mute”, the LED indicating communication is illuminated red.
STATUS INDICATION STATUS INDICATION
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REPLACEMENT OF BATTERY
1. Unscrew the screws on the back (a.b.c.)
with the torx wrench, included in the
package, then remove the cover! (d.)
2. Insert one A23 battery, as shown in the
diagram!
3. Put back the cover and fasten it tighte-
ning the screws!
volume
mute
2
3
4
1
Should your remote control not operate, remove its
back with the torx wrench,
included in the package,
and replace the one A23
battery!
1
2
LED indicating communication
Volume up
4
Mute
3
Volume down
REMOTE CONTROL
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KT120
E88CC E88CCECC83E88CC E88CCECC83
KT120 KT120 KT120
T X 08
1.
a.
b.
c.
d.
a.
b.
c.
d.
2. 3.
REPLACEMENT OF BATTERY VACUUM TUBES
T X 10
(OPTIONAL)
a.
b.
c.
d.
T X 10
1 2
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REPLACEMENT OF VACUUM TUBES
Unplug your amplier and do
not operate it at least 2 hours
before replacing tubes!
1. Unscrew the screws a.b.c.d.
with a torx 10 wrench!
2. Remove the protective cover
in the indicated direction!
3. Remove the vacuum tubes
carefully, then insert the replacement tubes on their spots!
T X 10
(OPTIONAL)
T X 10
3 4
a.
b.
c.
d.
qualiton A50i
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REPLACEMENT OF VACUUM TUBES
4. After putting back the protective cover, fasten it with the
screws a.b.c.d.
(In the case of tube replacement, before you
insert non-OEM tubes, please contact our
company and enquire about their compatibility!)
qualiton A50i
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Malfunction 1: Amplier does not power up.
1.a Make sure the amplier is plugged in!
1.b Be sure the main switch at the front panel is in
’I’ position!
1.c Should the fault persist after going through
points 1.a and 1.b, carefully check the mains
cable for intactness!
1.d Should the fault persist after going through
points 1.a, 1.b and 1.c, check whether the
front panel gauge illuminates red! If it does
not, check the power supply of your at!
1.e Should the fault persist after going through
points 1.a, 1.b, 1.c and 1.d, check the fuse of
the amplier for intactness, according to the
instructions stated in „SAFETY RECOMMENDATIONS—OPERATION”
1.f If the preceding points are all checked and
the amplier still does not power up please
contact our company!
Malfunction 2: The illumination of the status indi-
cator LED does not turn white.
2.a Should the indicator illumination not turn into
white after 60-90 seconds, please contact our
company!
TROUBLESHOOTING
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Malfunction 3: No sound from the speakers.
3.a Check the operation of the amplier according
to section 1 and 2!
3.b Be sure that the audio source is connected to
the input ports of the amplier!
3.c Be sure that the audio source is turned on!
3.d Be sure that the volume control knob is turned
up!
3.e Be sure that the speaker cables are correctly
connected to the correct ports!
3.f Check whether the speaker cables are correctly
connected to the speaker ports!
3.g If the preceding points are all checked and the
fault persists, please contact our company!
Malfunction 4: No sound from one side, no stereo
sound.
4.a Check the operation of the amplier according
to sections 1 and 2!
4.b Change your audio source! Make sure you are
listening to a stereo record!
TROUBLESHOOTING
qualiton A50i
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4.c If the preceding points are all checked and the
fault persists, please contact our company!
Malfunction 5: Noisy or distorted sound.
5.a Check the operation of the amplier according
to sections 1, 2 and 3! Should the fault persist,
please contact our company!
Malfunction 6: The top of the amplier is hot.
6.a Due to the inner circuitry of the amplier, this is
a normal phenomenon. For further information
check section ’INSTALLATION’.
MARKINGSTROUBLESHOOTING
- The product meets the directives and
standards of the European Union.
- Supplied with alternating current.
- Nominal supply voltage.
- Nominal supply frequency.
- Product requiring waste separation.
- Warning! This component can only be
replaced by components specied in
this user manual!
!
qualiton A50i
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- The appliance and its packaging are made of recycla-
ble materials.
- The appliance contains repairable or recyclable com-
ponents and materials. Waste separation makes their
recycling possible.
- A faulty appliance or an appliance meant to be dis-
carded has to be sent or brought to an adequate
waste collection place or to our company site!
- For further information on waste disposal please con-
tact our company or local authorities!
WASTE MANAGEMENT
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WARRANTY
The serial number of your appliance (engraved on a metal plate) is placed
on its bottom. Please refer to this number while contacting our company!
__________________________________________________________
Set of tubes used:
_______________________________________
_______________________________________
_______________________________________
Measurement conducted by:
Date: ________________ P.H.
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DECLARATION OF CONFORMITY
We, Audio-Hungary Ltd., declare, taking this declaration under our total responsibility, that tube power amplier model Qualiton A50i
is in conformity with EN 55013, EN 61000-3-2, EN 61000-3-3, and EN 55020 in accordance with the Directive 2006/95/EC of 12
December 2006.
This declaration certies compliance with the indicated directives but implies no warranty of properties. The safety instructions of
the accompanying documentation shall be observed. This declaration of conformity is issued under the sole responsibility of the
manufacturer.
Issuer:
Audio-Hungary Ltd.
Nádor Street 28.
4400 Nyíregyháza Hungary
Place, date: Hungary , 21.05.2016
Legally binding signature:
Andras Imre Fabian
Document: 2016/02.
Manufacturer:
Audio-Hungary Ltd.
Nádor Street 28.
4400 Nyíregyháza Hungary
We declare that the designated product(s): Qualiton A50i is/are in
conformity with the European Directives:
EN 60065:2015
EN 55014-1:2006+A1:2009+A2:2011
EN 55014-2:2006+A1:2009+A2:2011
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