Cayin PLUS MT-35 MK2 User manual

User's Manual
Vacuum Tube Integrated Amplifier
MT-MK35 2
VACUUM TUBE INTEGRATED AMPLIFIER MT-35 MK2
LINE1
LINE2
LINE3
SELECTOR
VOLUME
MIN MAX

Table of Contents
Thanks for choosing Cayin MT-35 MK2 Vacuum Tube Amplifier and please read the user's
manual carefully before installation and operation.
In order to prevent damage during transportation, the amplifier is packed with protective foams surrounding
the tubes. Before installation and operation, please remove these foams to avoid any risks.
Integrated
Table of Contents………………………………………………………………………………… 1
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……………………………………………………………………………………………………………3
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………………………………………………………………………………………………………………4
Maintenance…………………………………………………………………………………………………………………5
……………………………………………………………………………………………………………5
…………………………………………………………………………………………………………………6
…………………………………………………………………………………………………………………7
…………………………………………………………………………………………………………………8
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………………………………………………………………………………………………………12
…………………………………………………………………………………………………………………13
Small Tips …………………………………………………………………………………………………………………13
…………………………………………………………………………………………………………14
………………………
Package Contents
Product Features
Safety Precautions
Specifications
Warranty Service
Precautions
Front Panel
Rear Panel
Top Panel
Installation
Tube Replacement
Audio Connection
Speaker Connection
Turning on
Troubleshooting
1

Please carefully check the package first and then open it.
Package contents include:
1. Cayin MT-35 MK2 1 piece；
2. Main Fuse 2 pieces；
3. Power cord 1 piece；
4. User's Manual 1 piece；
Please make sure local voltage level is matched with the input level of the amplifier,which indicates on the rear
panel. Too low or too high voltage may cause problem. Please contact our company or our local agent if you've
found improper voltage.
Recommendation:
Keep all packing materials for future use .
Cayin MT-35 MK2 Vacuum Tube Amplifier is designed and manufactured with our original parts and
reaching the best results. We are not responsible for problems and damages caused by non-original parts
replacement in the amplifier.
Integrated
NOTE:
2
Package Contents
All other parts except above are not included.
NOTE:

1. Unplug the power cord if you are not going to use the product for an extended period of time.
2. The machine will become hot after working for a long time. Please keep the unit's ventilation open and install
the amplifier at a well-ventilated place to avoid troubles and fire hazard.
3. Forbidden to operate when the output is open or shorted.
4. Do not attempt to service this product yourself. Opening the cover may expose you to dangerous voltage or
other hazards.
5. We are not responsible for any problems caused by checking and opening without permission of our
company. For service, Please contact a qualified service technician.
6. Do not place any objects filled with liquids such as vases or some others on the top or around.
7. Clean only with dry cloth.
8. Please move the amplifier carefully not to drop the unit or be subject to other strong shocks.
3
◆ Hand-made construction with the finest point-to-point wiring.
◆ Two EI output transformers with wide bandwidth are applied.
◆ Specially designed toroid transformer for power supply.
◆ 5BK7A tubes are used in the preamp stage.
◆ Four EL34 tubes are used for AB1 push-pull amplification.
◆ External user Bias Adjustment is accessible with the BIAS meter for monitoring on the top of the amplier.
◆
◆
◆ High-quality Japanese ALPS potentiometer.
◆ Equipped with easily-installed tube cover for protection.
Headphone output jack has been used.
Triode and Ultralinear selection.
Product Features
Safety precautions

4
Specifications
◆ To reduce the risk of electric shock, do not remove the cover.
◆ No user serviceable parts inside. Refer servicing to qualified
service personnel.
◆ To reduce the risk of fire or electronic shock, do not expose
the unit to rain or moisture.
The lightning flash with arrowhead symbol is intended to alert user to the presence of uninsulated
“dangerous voltage” within the product's enclosure that may be of a risk shock to persons.
The exclamation point is intended to alert user to the presence of important operation and maintenance
(servicing) instructions accompanying the appliance.
RISK OF ELECTRIC SHOCK
CAUTION
DO NOT OPEN
ITEM
SPECIFICATIONS
【 】Power Output
TR:18W+18W (RMS )
UL:35W+35W ( )
Triode mode
RMS Ultralinear mode
【 】 Frequency Response
8Hz～55KHz (-3dB)
【 】THD
1%(1kHz)
【 】S/N Ratio
89dB
【 】 Input Sensitivity
300mV
【 】Input Impedance
100kΩ
【 】Output Impedance
4 , 8ΩΩ
【Headphone 】Output Impedance
16Ω~300Ω
【Input Connector】
LINE1,LINE2,LINE3
【× × 】W D H
326mm×272mm×184mm
【 】Tube
12AX7×1、12AU7×2、EL34×4
【 】Net Weight
13.5kg
【Power Consumption】
260W
【Working Condition】
Temp：0℃～40℃ Humidity： 20%～80%
【Storage Condition】
Temp：-20℃～70℃ Humidity： 20%～90%

Warranty Service
1.This product is warranted for a period of twelve months beginning from the date of purchase.
2.The defective product must be returned to your dealer or our company for repairing when your dealer or our
company accepts your requirement.
3.The warranty doesn't extend to any product that has been opened by you without permission of our company.
NOTE:
◆
◆
Use the soft dry cloth to clean up the chassis regularly.
Do not use any chemicals for cleaning.
Maintenance
5
The information in this manual is subject to change
without further notice.
NOTE:
VACUUM TUBE INTEGRATED AMPLIFIER MT-35 MK2
LINE1
LINE2
LINE3
SELECTOR
VOLUME
MIN MAX

Precautions
YALIDA YN-401
◆ Connect the power only after finishing other connections.
◆
◆
◆
It is normal that power transformer becomes hot for extended period of operation.
Unplug the power cord if you're not going to use the product for an extended period of time.
Please make sure corresponding voltage is the same as required. We are not responsible for damage caused
by misuse of unsuitable voltage.
6
Connection of power cord:
Connect the speaker cables and signal cable first and then insert the power cord into the power socket.
Connected to AC Input
NOTE:
Connected to the power socket
LINE1LINE2LINE3
INPUT
ZHUHAI SPARK ELECTRONIC EQUIPMENT CO., LTD.
260
RISK OF ELECTRIC SHOCK
CAUTION
DO NOT OPEN
SPEAKER OUTPUTRIGHT
48
LEFT SPEAKER OUTPUT
4 8
M MKT-35 2

7
Front Panel
1.Power Switch
Used to switch on/off the amplifier.
2.Volume Knob
Used to control volume
3.
4. BIAS Meter
Used to mornitor the working current of
the power tube.
Backlight of the Meter is on when
switching on.
Headphone Socket
Let you enjoy the high-quality music with
headphone.
5. Input Selector
Used to choose 4 types of audio sources.
You can hear sound from LINE1 when LINE1 indicator is on.
You can hear sound from LINE2 when LINE2 indicator is on.
You can hear sound from LINE3 when LINE3 indicator is on.
Diagram 1
POWER
ON
OFF
1354
2
VACUUM TUBE INTEGRATED AMPLIFIER MT-35 MK2
LINE1
LINE2
LINE3
SELECTOR
VOLUME
MIN MAX

8
Rear Panel
1. Signal Input Terminal
Used for audio source input.
2. Right Channel Output
Used to connect with the right channel of speaker.
3. Left Channel Output
Used to connect with the left channel of speaker.
4. Power Socket with Main Fuse
Main fuse is located just below the power socket.
Replace the fuse with the same type as indicated.
13
Diagram 2
24
LINE1LINE2LINE3
INPUT
ZHUHAI SPARK ELECTRONIC EQUIPMENT CO., LTD.
260
RISK OF ELECTRIC SHOCK
CAUTION
DO NOT OPEN
SPEAKER OUTPUTRIGHT
48
LEFT SPEAKER OUTPUT
4 8
M MKT-35 2

Top Panel
9
3.
4.V1、V2、V3:5BK7A
5.
Used to select Triode/Ultralinear working state.
TR:Triode Operation State;
UL: Ultralinear Operation State.
1.
2.A1、A2、A3、A4: EL34
Bias Adjustment Knob for Power Tubes
(A1、A2、A3、A4)
Bias Selector Switch(A1、A2、A3、A4)
Used to select corresponding tube for bias
adjustment.
Triode/ Ultralinear Indicator
◆ Be careful of the high temperature of the tubes during operation.
◆ Replace the tubes carefully and correctly.
◆ Power tubes must be matched for well function.
NOTE
Diagram 3
Diagram 5
Bias meter during working
Note: When working normally,
the pointer should stay within
the A zone, still , it would move
for the voltage fluctuation.
Diagram 4
Bias meter when not working
A
Bias adjustment for the power tube:
Turn the BIAS SELECTOR Switch to the power tube you
are preparing to adjust. Adjust the corresponding BIAS
ADJ. small knobs with flat screwdriver, and inspect the
BIAS meter on the top panel and make sure the
pointerkeeps in the center. Bias adjustment for A1, A2,
A3, and A4 are the same. After all have been adjusted,
do it one more time, to make sure all the bias level of A1,
A2, A3, and A4 are the same.
Sample of Bias adjustment for power tube A1:
1. Turn the BIAS SELECTOR Switch to A1;
2. Turn the BIAS ADJ. knob A1, until the pointer of the
bias meter keeps in the center.
The same for A2, A3, A4.
A1
A2
A3
A4
BIAS ADJ.
A2
A1BIAS ADJ.
A3
A4
POWER TRANSFORMEROUTPUT TRANSFORMER
WIDE FREQUENCY RESPONSE
OUTPUT TRANSFORMER
WIDE FREQUENCY RESPONSE
BIAS SEL.
BIAS SEL.
TR UL A3
A4
A1A2
V1 5BK7A
V3 5BK7A
TR UL SEL.
V2 5BK7A
1 1
22
3 34 4
5
4

10
Carefully read and follow the manual for installation:
◆ Do not place the machine near heat sources such as radiators, heat registers or other products that produce
heat.
◆ In order to avoid being overheated please keep the unit's ventilation open.
◆ Do not expose this appliance to rain or moisture.
◆ Keep the amplifier in a certain distance so that it can be easily connected.
◆ Amplifier should install steadily and make sure all four feet are on the same level.
◆ Keep the amplifier over 15cm's distance to the surrounding walls.
Installation
Please make sure local voltage level is matched with
the input level of the amplifier, which indicates on the
rear panel. Too low or too high voltage may cause
problems or shorten the amplifier's life.
Tube Replacement
NOTE:
Tubes for the Machine Tubes Replacement
5BK7A
EL34
5BK7-A
EL34、6CA7、6L6、5881

11
Audio Connection
Connection method of Cayin MT-35 MK2 with other audio equipments Take pictures below for your reference.
To audio
output terminal
•
•
•
•
•
Pleace refer to the manuals of other connected equipments during the installation.
Do not insert the power cord into the main socket before all other equipments are
well connected.
Rrefers to right channel while L represents left channel.
Please take the right guidance for connection as wrong connection may cause
noise, low-grade function or damage.
Do not fasten signal cable together with power cable and speaker cables. It will
worsen the acoustic fidelity.
NOTE:
Wrong connection
Right connection
LINE1LINE2LINE3
INPUT
ZHUHAI SPARK ELECTRONIC EQUIPMENT CO., LTD.
260
RISK OF ELECTRIC SHOCK
CAUTION
DO NOT OPEN
SPEAKER OUTPUTRIGHT
48
LEFT SPEAKER OUTPUT
4 8
M MKT-35 2

12
Speaker Connection
Attach the positive from your speaker to the 4 or 8
ohm terminal and the negative to the 0 ohm
terminals separately. If your speakers are 6 ohm, 4
ohm or 8 ohm (recommended) terminal is
preferential and it would not cause damage to the
amplifier.Connecting the left and right speakers
according to the guidance can make sure of the
acoustic fidelity.
Connect the speaker cables with the amplifier after it is
well connected with the speakers.
Connect both of the speakers to make sure of the
acoustic fidelity.
Please notice the signal direction indication of the
cables.
Do not mix up the positive and negative ends of speaker
cables or it will cause short circuit.
•
•
•
•
1. Unscrew the terminal knob
2. Insert the speaker cable
3. Screw the terminal knob
Check the impedance of your speakers:
NOTE:
Connection of speaker cables:
Banana plug Normal plug
SPEAKER（L）SPEAKER（R）
BLACK
RED
BLACK
RED
+-
+-
LINE1LINE2LINE3
INPUT
ZHUHAI SPARK ELECTRONIC EQUIPMENT CO., LTD.
260
RISK OF ELECTRIC SHOCK
CAUTION
DO NOT OPEN
SPEAKER OUTPUTRIGHT
48
LEFT SPEAKER OUTPUT
4 8
M MKT-35 2

13
• Turn on the amplifier and the power LED will be on.
It shines and indicates that the amplifier is working.
• If the LED is not on please contact with our local
agent or our company.
• Select the right audio source channel, adjust the volume
to a certain position and then you can enjoy themusic
you prefer.
Turning On
Before turning on the amplifier please make sure all connections are right and power supply is stable.
1. When the audio system is under working state, don't
unplug the signal cable or speaker cables, or it will
cause damage to the amplifier and other equipments.
2. It should at least takes 2 minutes before you turn on the
power again, or it will cause damage to the vacuum
tubes.
NOTE:
Read the Manual—— Please read the user's manual carefully before installation and operation.
Keep the Manual——Please keep the manual for future reference.
Warning Signs——Don't tear off or rub off the serial number.
Operation——Do the operations as you are instructed in the Manual.
Parts—— If you are going to use parts not supplied by our company like power cord, fuses etc please
make sure that parts you used are compatible with the safety requirements. Or it will cause fire or electric
shock.
Placement——Put the amplifier on a level place. Make sure that it doesn't bring damage to the children,
adults and the amplifier itself.
Power——Please make sure the local voltage is the same level as indicated on the rear panel.
Overload——If the power socket is overloaded with other equipment, it will cause fire or electric shock.
Warranty Service——Do not open the product and change the components inside yourself. Opening
the cover may expose you to dangerous voltage or other hazards. The warranty doesn't extend to any
product that has been opened by you without permission of our company.
Troubleshooting——If any problems when you are using the product, please check according to
following tips to look for the exact reason. Please contact with our company if you can't solve the
problem.
Smal l Ti ps

14
Please follow the instruction in the manual in order to keep the amplifier work in its best state. If wrongly
operated and you thought that would be troubles please check according to following tips to look for the exact
reasons.
NOTE: is the registered trademark of Zhuhai Spark Electronic Equipment Co., Ltd.
Problem Cause Remedy
NO OUTPUT
Backlight of the Meter is Off
Backlight of the Meter is On
Sound Distortion
Noise output
Sound field Positioning
is not so good.
Power cord is not well-connected.
Main fuse is out.
Troubles of inner parts or components.
Volume is at ZERO.
NO signal input.
High input signal level.
Ground of input signal cable is open
or bad contact of the input signal
cable.
Components or circuits are in trouble.
Signal input cables or speaker
cables are wrongly connected.
Check power cable connection
or power outlet connection
Replace with the same type
and value fuse.
Please contact with local
agents or our company.
Turn up the Volume.
Check the function of the
sound source.
Check the input selection and
switch to the proper input.
Turn down the volume to
suitable .position
Replace the input signal
cable with a new one.
Please contact with local
agents or our company.
Reconnect it as suggested in
the manual.
Troubleshooting