qualiton A50i User manual

- 01 -

Introduction
Thank you for purchasing a qualiton A50i power amplier!
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

- 2 -
Before installing the stereo power amplier qualiton
A50i, please study this user manual carefully!
Operating your power amplier in a manner it is de-
signed for ensures you an utmost musical experi-
ence and a reliable operation.
If you have any questions on our products or ser-
vices, please do not hesitate to contact us on our
website www.audiohungary.com
PREFACE

- 3 -
!
- 1pc qualiton a50i stereo amplier
- 1pc user manual
- 1pc standard mains cable
- 1pc remote control
- 1pc torx wrench (TX08)
- 1pc A23 battery
CONTENTS OF PACKAGE

- 4 -
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 Ωand 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

- 5 -
3 1 2 4 5
FRONT PANEL CONTROLS
1
2
3
4
Main switch
Input selector rotary switch
Volume control
Status indicator LED
5LEDs 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 amplier,
it may heat up during use. Thus, choose a location for
installation where the appliance can be well ventila-
ted!
- Make sure that cables connecting the amplier to the
speakers as well as cables connected to the ports of
the amplier 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 amplier through an ungrounded
outlet!
- The amplier 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 amplier 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 indi-
cated by illuminated LEDs, from the left to the right in
order: LINE 1; LINE 2; LINE 3; LINE 4
- Never operate the amplier without a sufcient load!
Do not power up the amplier until correct loads (4 or
8 Ω) are connected to the output ports!
INSTALLATION

!
!
- 8 -
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-
lier into operation!
- The aforesaid applies to the very rst installation
of the amplier as well. Prior to the rst installa-
tion, leave the amplier 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 amplier!
- The ventilation holes of the amplier 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
!
- 9 -
- Improper installation may cause breakdown!
- Before powering up your amplier, make sure
cover, ports, plugs and cables are checked for
intactness!
- You must not start up damaged or faulty app-
liance! In case of any malfunction, unplug your
amplier 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 amplier
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 qualied
adults or children above 14 years of age if super-
vised by a qualied 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
amplier, always make sure it is connected and
operated in a proper manner!
SAFETY RECOMMENDATIONS - OPERATION

!
!
- 10 -
- At the mains cable and output ports, there is no
risk of electric shock. Nevertheless, the applian-
ce must be handled with care!
- If you do not use your amplier for a long time,
unplug the appliance carefully!
- Do not block the openings of your amplier 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 frequ-
ency is 50 Hz!
- Never operate the amplier through an ung-
rounded outlet!
- The AC socket features a built-in fuse box. En-
sure replacement fuses with rating T 6.3 L (type
time-delay, low breaking capacity).
SAFETY RECOMMENDATIONS - OPERATION

!
qualiton A50i
!
- 11 -
- 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 posi-
tion!
- You must not operate the appliance with da-
maged cables!
- In case of re, you must not use water to extin-
guish the re, even if the amplier 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 amplier without a sufcient
load! Do not power up the amplier until correct
loads (4 Ω or 8 Ω) are connected to the output
ports!
- Connect your amplier to the other elements of your
soundsystemaccordingtotheconnectiondiagram!
- 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.

- 13 -
- 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 amplier is muted)
REMOTE CONTROL STATUS INDICATION
- During adjusting volume, the LED indicating
communication is illuminated white.
- After pushing the button ”mute”, the LED indi-
cating communication is illuminated red.
STATUS INDICATION STATUS INDICATION

- 14 -
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
234
1
Should your remote cont-
rol 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
4Mute
3Volume down
REMOTE CONTROL

- 15 -
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
- 16 -
REPLACEMENT OF VACUUM TUBES
Unplug your amplier 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 repla-
cement tubes on their spots!

T X 10
(OPTIONAL) T X 10
3 4
a.
b.
c.
d.
qualiton A50i
- 17 -
REPLACEMENT OF VACUUM TUBES
4. After putting back the pro-
tective 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 compati-
bility!)

qualiton A50i
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Malfunction 1: Amplier does not power up.
1.a Make sure the amplier 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 amplier for intactness, according to the
instructions stated in „SAFETY RECOMMEN-
DATIONS—OPERATION”
1.f If the preceding points are all checked and
the amplier 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