Qualiton A75 Integrated Amplifier
Product Information:
The Qualiton A75 is an audio amplifier designed for high-quality
sound reproduction. It is a versatile and powerful device that
provides an enhanced audio experience. The amplifier is equipped
with various features to ensure safety and optimal performance.
Important Safety Instructions:
- Read these instructions.
- Keep these instructions.
- Heed all warnings.
- Follow all instructions.
- Do not install near any heat sources such as radiators, heat
registers, stoves, or other apparatus (including amplifiers) that
produce heat. - Do not use this apparatus near water.
- Clean only with a dry cloth.
- Do not block any ventilation openings since this may lead to
fire. Install in accordance with the manufacturer’s
instructions. - Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two blades with one wider
than the other. A grounding type plug has two blades and a third
grounding prong. The wide blade or the third prong are provided for
your safety. If the provided plug does not fit into your outlet,
consult an electrician for replacement of the obsolete outlet. - Connect mains power supply cord only to a mains socket outlet
with a protective earthing connection. - Be careful with appliance cables! Do not lead them across sharp
surfaces, do not clam them together, and do not leave them in a
hanging position. Protect the power cord from being walked on or
pinched particularly at plugs, convenience receptacles, and the
point where they exit from the apparatus. - You must not operate the appliance with damaged cables.
- Before powering up your amplifier, make sure protective cover,
ports, plugs, and cables are checked for intactness. - Only use attachments/accessories specified by the
manufacturer. - Servicing is required when the apparatus has been damaged in
any way, such as power supply cord or plug is damaged, liquid has
been spilled or objects have fallen into the apparatus, the
apparatus has been exposed to rain or moisture, does not operate
normally, or has been dropped. - Do not touch the appliance or its mains cable with wet
hands. - In case of fire, you must not use water to extinguish the fire,
even if the amplifier is switched off. - You must not start up damaged or faulty appliance. In case of
any malfunction, unplug your amplifier immediately. - In case of a malfunction, the protective cover must not be
opened or removed. - Do not expose this equipment to dripping or splashing and
ensure that no objects filled with liquids, such as vases, are
placed on the equipment.
Product Usage Instructions:
To ensure proper usage and maximize performance, follow these
instructions:
- Read the user manual thoroughly before operating the Qualiton
A75. - Keep the user manual in a safe place for future reference.
- Ensure that the amplifier is installed in a well-ventilated
area and away from heat sources such as radiators, heat registers,
stoves, or other heat-producing devices. - Do not use the amplifier near water or in humid
environments. - Clean the amplifier only with a dry cloth.
- Ensure that the ventilation openings of the amplifier are not
blocked to prevent the risk of fire. - Use the provided polarized or grounding-type plug and connect
it to a mains socket outlet with a protective earthing
connection. - Avoid placing appliance cables across sharp surfaces, clamping
them together, or leaving them in a hanging position. Protect the
power cord from being walked on or pinched, especially at plugs,
convenience receptacles, and the point where they exit from the
amplifier. - Do not operate the amplifier with damaged cables. Replace any
damaged cables before use. - Before powering up the amplifier, carefully inspect the
protective cover, ports, plugs, and cables for any signs of damage.
Do not use the amplifier if any components are damaged. - Use only attachments and accessories specified by the
manufacturer. - If the amplifier has been damaged in any way, such as power
supply cord or plug damage, exposure to liquid, or objects falling
into the apparatus, it is recommended to seek professional
servicing. - Avoid touching the amplifier or its mains cable with wet hands
to prevent electric shock. - In case of a fire, do not use water to extinguish it, even if
the amplifier is switched off. - If the amplifier is damaged or faulty, immediately unplug it
from the power source and discontinue use. Do not attempt to repair
it yourself; seek assistance from qualified service personnel. - Do not open or remove the protective cover of the amplifier in
case of a malfunction. Refer to qualified service personnel for any
necessary repairs. - Avoid exposing the amplifier to dripping or splashing liquids.
Ensure that no objects filled with liquids, such as vases, are
placed on the equipment.
Qualiton A75 User’s Manual
CONTENTS
IMPORTANT SAFETY INSTRUCTIONS………………………….. 4 MARKINGS ……………………………………………………………………. 8 PREFACE ……………………………………………………………………….. 9 BASIC INFORMATIONS ………………………………………………..10 TECHNICAL ASSISTANCE AND SERVICE INFORMATION … 11 GENERAL SPECIFICATIONS…………………………………………12 ELECTRICAL SPECIFICATIONS ……………………………………13 FRONT PANEL………………………………………………………………14 REAR PANEL…………………………………………………………………16 CONTENTS OF PACKAGE …………………………………………….18 PLACEMENT…………………………………………………………………19 INSTALLATION OF VACUUM TUBES ……………………………20 USING THIRD PARTY VACUUM TUBES ……………………….23 BLOCK DIAGRAM …………………………………………………………24 CONNECTION DIAGRAM ……………………………………………..25 AC MAINS CONNECTION …………………………………………….26 GOOD TO KNOW…………………………………………………………..27 REMOTE CONTROL ……………………………………………………..28 INSERTING / REPLACING BATTERY ……………………………29 REPLACEMENT OF FUSE …………………………………………….30 WASTE MANAGEMENT ……………………………………………….31
4 IMPORTANT SAFETY INSTRUCTIONS
PLEASE READ THEM BEFORE OPERATING THIS EQUIPMENT!
1. Read these instructions. 2. Keep these instructions.
QUALITON A75
9. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
3. Heed all warnings.
4. Follow all instructions.
5. Improper installation may cause malfunction!
6. Do not use this apparatus near water.
7. Clean only with a dry cloth.
8. Do not block any ventilation openings since this may lead to fire. Install in accordance with the manufacturer’s instructions.
10. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
11. Connect mains power supply cord only to a mains socket outlet with a protective earthing connection.
USER’S MANUAL
5
IMPORTANT SAFETY INSTRUCTIONS
12. Be careful with appliance cables! Do not lead them across sharp surfaces, do not clam them together and do not leave them in a hanging position.
Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
16. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tipover.
13. You must not operate the appliance with 17. Unplug this apparatus during lightning storms or
damaged cables.
when unused for long periods of time.
14. Before powering up your amplifier, make sure 18. No userserviceable parts inside. Improper
protective cover, ports, plugs and cables are checked repair may lead to loss of warranty! Refer servicing
for intactness.
to qualified service personnel.
15. Only use attachments/accessories specified by the manufacturer.
6
QUALITON A75
IMPORTANT SAFETY INSTRUCTIONS
PLEASE READ THEM BEFORE OPERATING THIS EQUIPMENT!
19. Servicing is required when the apparatus has been damaged in any way, such as power supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
23. Do not touch the appliance or its mains cable with wet hands.
24. In case of fire, you must not use water to extinguish the fire, even if the amplifier is switched off.
20. You must not start up damaged or faulty 25. The appliance may only be used by qualified
appliance. In case of any malfunction, unplug your adults or children above 14 years of age if
amplifier immediately.
supervised by a qualified adult.
21. In case of a malfunction, the protective cover must not be opened or removed.
22. Do not expose this equipment to dripping or splashing and ensure that no objects filled with liquids, such as vases, are placed on the equipment.
26. Keep the appliance out of the reach of children.
27. Make sure your domestic animal does not lie or sit on the top of the appliance.
28. If you do not use your amplifier for a long time, unplug the appliance carefully.
USER’S MANUAL
7
IMPORTANT SAFETY INSTRUCTIONS
29. To completely disconnect this equipment from the AC mains, disconnect the power supply cord plug from the AC receptacle.
30. The mains plug of the power supply cord shall remain readily operable.
31. Do not expose batteries to excessive heat such as sunshine, fire or the like.
32. WARNING! To reduce risk of fire or electrical shock, do not expose this equipment to rain or moisture.
33. CAUTION! To reduce the risk of electric shock, do not remove cover.
8 MARKINGS
QUALITON A75
The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance instructions in the literature accompanying the appliance.
CAUTION: Hot Surface! Do Not Touch! Protective cover of the product may become hot when operating this product continuously.
The product meets the relevant directives and standards of the European Union.
Supplied with alternating current (AC).
115 V / 230 V Nominal supply voltage.
50 Hz / 60 Hz Nominal supply frequency.
The crossed-out wheeled bin is the European Union symbol for indicating separate collection for electrical and electronic equipment. This product contains electrical and electronic equipment which should be reused, recycled or recovered and should not be disposed of with unsorted regular waste. Please return the unit or contact the authorised dealer from whom you purchased this product for more information.
USER’S MANUAL
9
PREFACE
Before installing the Qualiton A75 stereo amplifier, please study this User’s Manual carefully!
Operating your amplifier 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
10 BASIC INFORMATIONS
For your convenience, please fill out the following lines to facilitate any future technical assistance and repair service:
Serial Number: _______________________________
Date of purchase: _______________________________
Dealer Name: _______________________________
Vacuum tubes used: _______________________________ _______________________________ _______________________________
QUALITON A75
USER’S MANUAL
11
TECHNICAL ASSISTANCE AND SERVICE INFORMATION
If at any time you have any questions about your Qualiton product, do not hesitate to contact your local Qualiton dealer, who is at your disposal. If you or your dealer need more help, you can receive technical assistance at:
Audio-Hungary Ltd. 132 Derkovits Street 4400, Nyíregyháza, Hungary Phone: +36 42 446-688 Fax: +36 42 446-688 E-mail: [email protected]
If it becomes clear that your Qualiton product needs service, you should still contact your local dealer first. You can also contact us directly for more instructions at one of the contact details above.
12 GENERAL SPECIFICATIONS
Number of input ports / channel
Number of output ports / channel Tubes required
Weight Dimensions Power requirement
QUALITON A75
3 unbalanced Stereo IN 1 balanced Stereo IN
2 unbalanced Power OUT 4 x KT120 (KT150 or KT170 optionally)
4 x 12AT7 2 x 12AX7
21 kg 35 x 42 x 22 cm
620 W
USER’S MANUAL ELECTRICAL SPECIFICATIONS
Rated output power Input impedance, Balanced Stereo IN Input impedance, Unbalanced Stereo IN Input sensitivity, Balanced Stereo IN Input sensitivity, Unbalanced Stereo IN
Gain Frequency response Total Harmonic Distortion Signal-to-noise ratio
Load impedance
13
2 x 75 W 40 kOhm 10 kOhm 920 mV, to rated output 920 mV, to rated output +28.5 dB (RL = 8 Ohm) 25 Hz to 70 kHz (-3 dB, rated output) < 0,1% (f = 1 kHz, rated output) > 100 dB (RL = 8 Ohm, rated output) 4 or 8 Ohm
14 FRONT PANEL
QUALITON A75
1
2
3
4
USER’S MANUAL
15
FRONT PANEL
1. MAIN SWITCH with position indicator
2. VOLUME control allows adjustment of the stereo listening level
3. INPUT LEDs indicating the selected input port. From left to right: BALANCED INPUTS – LINE 1, 2, 3
4. INPUT SELECTOR switch allows selection of amplifier channel used.
16 REAR PANEL
QUALITON A75
1
2
3
4
5
USER’S MANUAL
17
REAR PANEL
1. BALANCED INPUTS accept high level program source signals.
2. LINE 1, 2, and 3 INPUTS accept high level program source signals
3. Right speaker outputs 0-4 Ohm – connect a 4 Ohm speaker 0-8 Ohm – connect an 8 Ohm speaker
4. Left speaker outputs 0-4 Ohm – connect a 4 Ohm speaker 0-8 Ohm – connect an 8 Ohm speaker
5. IEC appliance AC INLET with main switch.
18
CONTENTS OF PACKAGE
Once you have unpacked the entire contents of the package, you can now check that you have received all the accessories.
– 1 pc Qualiton A75 – 1 pc Remote Control – 1 pc User’s Manual – 2 pcs ECC83 or 12AX7 vacuum tubes – 4 pcs ECC81 or 12AT7 vacuum tubes – 1 pc Standard Mains Cable – 1 pc Torx Wrench (TX10)
QUALITON A75
USER’S MANUAL
19
PLACEMENT
· Please read the following carefully to select a correct location for your amplifier.
· IMPORTANT! Due to the vacuum tube construction of the amplifier, it may heat up during use. Thus, choose a location for installation where the appliance can be well ventilated.
· The ventilation holes of the amplifier must not be covered (by tablecloth, curtain, newspaper, book, etc.). Impairing ventilation can lead to overheating and irregular operation conditions.
· The aforesaid applies to the very first installation of the amplifier as well. Prior to the first installation, leave the amplifier at its place of operation at least for 2 hours. Once this time is over, the amplifier can be powered up, according to this guide.
· The appliance is designed for indoor use. Do not operate it in wet, humid environment.
200mm
200mm
200mm
· Do not stack multiple units on top of each other.
· Avoid relocating the appliance from a cold to a warm environment. Sudden temperature changes can lead to moisture condensation. Please wait until moisture is evaporated before putting your amplifier into operation.
· Do not store any electrical device or object in a perimeter of 200 millimetres around your amplifier. Do not use the appliance next to heating sources and radiators. Keep it away from hot or dusty environment and flame.
20
INSTALLATION OF VACUUM TUBES
1. You have to remove the protective cover to prepare for the insertion of the electron tubes. The protective cover locks in place with relatively high resistance, be careful not to scratch the device while removing it. See the figure below.
2. Remove a tube from one of the boxes labeled ECC83 and carefully place it in one of the positions labeled ECC83 / 12AX7 on the amplifier. Make sure that the holes in the electron tube socket fit the pins of the electron tube correctly. See the figure below.
3. Repeat the previous step with the other ECC83 and ECC81 tubes.
4. Carefully put the protective cover back in place. See the figure below.
QUALITON A75
USER’S MANUAL
21
INSTALLATION OF VACUUM TUBES
KT88 – KT170 KT88 – KT170 KT88 – KT170 KT88 – KT170 12AT7 12AT7 12AX7 12AX7 12AT7 12AT7 ECC81 ECC81 ECC83 ECC83 ECC81 ECC81
22 INSTALLATION OF VACUUM TUBES
KT88 – KT170 12AT7/ECC81
QUALITON A75
USER’S MANUAL
23
USING THIRD PARTY VACUUM TUBES
· Audio-Hungary Ltd. does not recommend the use of any other electron tubes in the A75 preamplifier other than those supplied with the device.
· Audio-Hungary Ltd. cannot and does not warrant against, and shall have no liability of any kind for any defects resulting from the use of vacuum tubes from third parties and such defects will void the warranty.
24 BLOCK DIAGRAM
QUALITON A75
USER’S MANUAL CONNECTION DIAGRAM
Q40-S SPEAKER (OPTIONAL)!
Q40-S SPEAKER (OPTIONAL)!
25
MEDIA SERVER (OPTIONAL)
MAGNETOFON (OPTIONAL)
CD PLAYER (OPTIONAL)
RADIO (OPTIONAL)
26 AC MAINS CONNECTION
QUALITON A75
· The Qualiton A75 is factory configured for one of the following AC Mains Voltages:
~ 115 V/60 Hz at Amps 10 AT ~ 230 V/50 Hz at Amps 6,3 AT
WARNING! Do not connect any external source to the appliance until you have connected it to a mains socket outlet with a protective earthing connection.
· Make sure you want to operate the A75 at the AC mains voltage and frequency marked on the back.
· The standard IEC power inlet with fuse holder are placed on the rear panel.
· The amplifier is of Class 1 construction and must be connected to a mains socket outlet with a protective earthing connection.
· The appliance can be operated safely only with the supplied standard IEC mains cable.
USER’S MANUAL
27
GOOD TO KNOW
The Qualiton A75 features a sophisticated, fully automatic bias control system for the four power tubes. This circuit continuously monitors the behavior of each tube and regulates the bias voltages accordingly.
28 REMOTE CONTROL
SOURCE VOLUME
MUTE
1. SOURCE 2. VOLUME UP 3. VOLUME DOWN 4. MUTE
QUALITON A75
USER’S MANUAL
29
INSERTING / REPLACING BATTERY
PLEASE NOTE: A75’s remote control comes without battery. The remote control operates with type A23 battery. Battery should be installed by the user before first use:
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 an A23 battery, as shown in the diagram.
3. Place back the cover and fasten it tightening the screws.
30 REPLACEMENT OF FUSE
The IEC power inlet features a builtin fuse holder. The specification of replacement fuses are: 6,3 AT for 230 V AC mains and 10 AT for 115 V AC mains.
1. Open the fuse holder with a screwdriver.
2. Change the used main fuse (b.) for the spare fuse (a.).
1.
QUALITON A75
a. b.
2.
USER’S MANUAL
31
WASTE MANAGEMENT
· The appliance and its packaging are made of recyclable materials.
· The appliance contains repairable or recyclable components and materials. Waste separation makes their recycling possible.
· A faulty appliance or an appliance meant to be discarded has to be sent or brought to an adequate waste collection place or to our company site.
· For further information on waste disposal please contact our company or local authorities.
Audio-Hungary Ltd. Hungary 132 Derkovits Street 4400 Nyíregyháza
WWW.AUDIOHUNGARY.COM
Audio Hungary
