Cayin HA-1A MK2 User manual

User's Manual
VACUUM TUBE HEADPHONE AMPLIFIER
HA-1 2AMK
VOLU ME
INPUT
SELECTOR IMPEDANCE
SELECTOR
MIN MAX
PHONES A PHONES B
POWER
ON OFF
VACUUM TUBE HEADPHONE AMPLIFIER HA-1A MK2
65-150Ω
8-32Ω
33-64Ω151-300Ω
600Ω
CD AUX

Table of Contents
Thanks for choosing CAYIN HA-1A MK2 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.
Vacuum Tube Headphone
Table of Contents
Package Contents…………………………………………………………………………………………………………2
Product Features………………………………………………………………………………………………………2-3
Safety Precautions………………………………………………………………………………………………………3
Specifications………………………………………………………………………………………………………………4
Maintenance………………………………………………………………………………………………………………5
Warranty Service…………………………………………………………………………………………………………5
Precautions…………………………………………………………………………………………………………………6
Front Panel…………………………………………………………………………………………………………………7
Rear Panel…………………………………………………………………………………………………………………8
Installation………………………………………………………………………………………………………………9
Tube Replacement ……………………………………………………………………………………………………9
Audio Connection………………………………………………………………………………………………………10
Turn on……………………………………………………………………………………………………………………11
Small Tips…………………………………………………………………………………………………………………11
Troubleshooting ………………………………………………………………………………………………………12
……………………………………………………………………………………………… 1…………
1

Please carefully check the package first and then open it.
Package contents include:
1. CAYIN HA-1A MK2 1 piece
2. Users' Manual 1 piece
3. Power cord 1 piece
4. Main Fuse 4 pieces(100V～120V:T1AL250VX2; 220V～240V:T500mAL250VX2）
Please make sure the AC voltage selector on the rear panel is setup correctly for your local power supply
voltage . 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 HA-1A MK2 Vacuum Tube Headphone 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.
NOTE:
2
Package Contents
All other parts except above are not included.
NOTE:
Product Features
◆Deploy Electro-Harmonix EL84EH (Russian) as power tube
◆Deploy 12AU7 as signal tube
◆Deploy NOS 12DT5 as power regulation tube
◆Deploy premium grade Z11 EI-core as power transformer
◆Deploy wide-band premium grade Z11 EI-core output transformer, the unique layer winding
technique offer high quality and versatile at the same time
◆Deploy premium grade ALPS-27 rotary potentiometer as volume control
◆Specially designed 5 steps output impedance selection offers precise matching to most
headphones available on the market

1.Unplug the power cord if you are not going to use the amplifier for an extended period of time, and keep
the machine in proper condition
2.The machine will become hot during operation, Please keep the amplifier at a well-ventilated
environment and do not cover the amplifier with anything.
3.Do not operate the amplifier when the output is open or shorted, will cause serious damage to the
amplifier and associated equipment.
4.Do not attempt to service this product yourself. Opening the cover may expose you to electric shock or
other hazards.
5.Do not attempt to disassembly the machine, all service and maintenance must be conducted by
authorized service technician.
6.The amplifier must be keep away from water dripping or water splitting, do not place any objects filled
with liquids such as vases or some others on the top or around.
7.Please disconnect power cable before you attempt to clean the machine. Please use soft clean cloth to
wipe clean the chassis, do not use volatile solution or corrosive cleaning product.
8.Please handle with care, do not drop the machine and avoid shock or collision with other hard subjects.
3
Product Features
Safety precautions
◆Designed with commonly available vacuum tubes, allow tube rolling with compatible tubes
from different brands and dates, users can fully appreciate the strength of tube amplification.
◆Dedicated implementation of single-ended amplification circuit offer simple, pure and
devoted music presentation.
◆Extensive Power Management consideration with separated power supply to signal and
voltage amplification, using power regulation tube further isolate the two stage power supply
from each other, this can safety the components are operated at the best possible condition,
and the audio performance will be significantly enhanced.
◆Equipped with Pre-out connection, making the amplifier can function as an audiophile grade
tube preamp with paired with an active speaker or a power amplifier.
◆Two sets of Neutrik 6.35mm stereo headphone output work in parallel, Phone A set for
Dynamic presentation, Phone B set for Soft presentation.
◆Design with an innovative circuit layout and highly effective shielding consideration, the
components will function at premium environment to ensure high quality audio performance
form the amplifier.
◆Optimised air duct cooling system to disperse heat out of the amplifier effectively, ensure the
amplifier can work stably for long hours.
◆Deploy 3 independent supporting foot to optimize shock absorption and improve audio
performance.

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.
TYPE
ITEM
SPECIFICATIONS
Headphone
Output
(PHONES A)
(PHONES B)
【Power Output】
1400mW+1400mW (@32Ω) 850mW+850mW(@64Ω)
1200mW+1200mW (@150Ω) 2000mW+2000mW (@300Ω)
2200mW+2200mW (@600Ω)
【 】Frequency Response
20Hz～45kHz ±3dB
【THD】
1%(1kHz)
【 】Input Sensitivity
200mV～440mV
【S/N Ratio】
100dB （A-Weighted）
【 】Output Impedance
8~32Ω，33~64Ω，65~150Ω，151~300Ω，600Ω
PRE-OUT
【Output level】
2V （MAX 4V）
【Frequency Response】
10Hz~42kHz ±3dB
【Input Sensitivity】
420mV
【THD】
0. 5%
【S/N Ratio】
100dB （A）-Weighted
OTHER
【Input】
CD,AUX
【Output】
PRE-OUT
【WDH】
126.5mm 304mm 215mm× ×
【Tube】
12AU7×2、EL84EH×2、12DT5×1
【Net Weight】
9.5KG
【Max Power Consumption】
65W
【Working Condition】
Temperature：0℃～40℃ Moisture：20%～80%
【Storage Condition】
-20℃～70℃ Moisture：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.
Maintenance
5
NOTE:
◆
◆
Use the soft dry cloth to clean up the chassis regularly.
Do not use any chemicals for cleaning.
The information in this manual is subject to change
without further notice.
NOTE:
VO LU ME
INPUT
SELECTOR IMPEDANCE
SELECTOR
MIN MAX
PHONES A PHONES B
POWER
ON OFF
VACUUM TUBE HEADPHONE AMPLIFIER HA-1A MK2
65-150Ω
8-32Ω
33-64Ω151-300Ω
600Ω
CD AUX

Precautions
◆ 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 the AC voltage selector is setup correctly for yur local power supply voltage. 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.
NOTE:
Connected to AC INPUT
Connected to power socket
INPUT
CD AUX PRE-OUT
OUTPUT
AC INPUT
ZHUHAI SPARK ELECTRONIC EQUIPMENT CO.,LTD.
MODEL : HA-1A MK2
SER.NO. :
VACUUM TUBE HEADPHONE AMPLIFIER
230V 50Hz 65W
FUSE T0.5AL250V

7
Front Panel
VO LU ME
INPUT
SELECTOR IMPEDANCE
SELECTOR
MIN MAX
PHONES A PHONES B
POWER
ON OFF
VACUUM TUBE HEADPHONE AMPLIFIER HA-1A MK2
65-150Ω
8-32Ω
33-64Ω151-300Ω
600Ω
CD AUX
DRAW ONE：HA-1A MK2 Front Panel 1.Volume Control
Control the volume of the amplifier, turn clockwise to increase
volume, turn anti-clockwise to decrease volume.
2.Phone A
Designed to work with headphones terminated with standard
6.35mm stereo (TRS) connector. Can handle headphone
within the range of 8ohm to 600ohm, the actual impedance
value can be specified by selecting appropriate range from the
Impedance selector.
3.Source
The amplifier can connect with two sources (marked as CD
and AUX), you can select one source for playback.
4.POWER On/Off:
Turn on and off the amplifier. Be reminded to unplug the
power cable if the amplifier will not be used for a long time.
5.Status indicator
Indicate the working status of the amplifier, when the indicator
is always on, the amplifier is in regular operation
6.Impedance Selector
Select best matching impedance for your headphone. You
can select the best impedance range within 8ohm – 600ohm.
You can refer to the impedance value of your headphone and
select the nearest impedance range to match up with.
7.Phone B
Designed to work with headphones terminated with standard
6.35mm stereo (TRS) connector. Can handle headphone
within the range of 8ohm to 600ohm, the actual impedance
value can be specified by selecting appropriate range from the
Impedance selector.
2473
1 6
Note: This amplifier is designed to output at fixed impedance, we do not recommend using
Phone A and Phone B concurrently because this might impose negative effect to audio
performance.
5

INPUT
CD AUX PRE-OUT
OUTPUT
ZHUHAI SPARK ELECTRONIC EQUIPMENT CO.,LTD.
8
Rear Panel
Note: Please make sure the AC Voltage Selector is setup correctly for your local power supply voltage.
When you change the AC voltage setting, please replace the fuse with the spare fuse provided in
the amplifier package. Incorrect input voltage setting or using incompatible fuse will cause
damage to the machine or might even lead to serious household accident. Cayin reserves the
right to refuse service or responsibility on related instances.
1.Audio Signal Input (CD, AUX)
Connect output from source equipment such as
CD player, DAC to the amplifier.
2.Pre-Out
Connect to input connectors of power amplifier or
active speaker
3.Power Input with Fuse Tray
Connect to AC power outlet
There are fuse inside the fuse tray, If in case you
need to change the fuse, please resort to
replacement fuse with same specification with
the original.
DRAW TWO HA-1A MK2 Rear Panel
1
2
3
AC INPUT
MODEL : HA-1A MK2
SER.NO. :
VACUUM TUBE HEADPHONE AMPLIFIER
230V 50Hz 65W
FUSE T0.5AL250V

Carefully read and follow the manual for installation:
◆
heat.
◆ In order to avoid being overheated please keep the amplifier at highly ventilated environment.
◆ 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 be placed on a flat surface, make sure all four supporting feets are evenly loaded.
◆ Keep the amplifier at least 20cm's distance from surrounding walls.
Do not place the machine near heat sources such as radiators, heaters or other products that disperse
Installation
Please make sure the AC voltage selector at the rear
panel is setup correctly for your local power supply
voltage.Incorrect AC voltage setting might cause
serious damage to the amplifier.
NOTE:
Tube Replacement
Tubes for the Machine
Tube Replacement
EL84EH
EL84、6BQ5、6P14
12DT5
12DT5
12AU7
12AU7EH、ECC82、E82CC、ECC802S
9

INPUT
CD AUX PRE-OUT
OUTPUT
ZHUHAI SPARK ELECTRONIC EQUIPMENT CO.,LTD.
10
Audio Connection
Connection method of CAYIN HA-1A MK2 with other audio equipments for reference only.
Wrong connection
Right connection
NOTE:
• Please refer to the manual s for connection with other equipments during the installation.
• Do not insert the power cord in to the main socket before all other equipments are well connected.
• R refers to right channel while L represents left channel.
• Please take the right guidance for connection as wrong connection may cause noise, down graded
function or damage.
• Do not fasten signal cable together with power cable and speaker cables. It will seriously affect the
audio performance.
To audio output
POW ER
32B IT/38 4kHz PC M & DSD AUDI O DAC
HIF I AUD IO D/A CON VERT ER i DA C- 6
Sou rce Timb re Li ne/P re
MEN U/V OLU ME
To DAC output
To power amp.input
AC INPUT
MODEL : HA-1A MK2
SER.NO. :
VACUUM TUBE HEADPHONE AMPLIFIER
230V 50Hz 65W
FUSE T0.5AL250V

Turning On
Before turning on the amplifier please make sure all connections are correct and power supply is
stable.
Turn on the amplifier, the power indicator will turn on and the power indicator will keep flashing.
The power indicator will become steady(always ON) after 30 seconds. It means that the amplifier is ready for
operation. If the power indicator turn off, please turn off the power and contact our local agent or cayin service
support.
Select the correct audio source channel, adjust the volume to appropriate level and you can enjoy you music.
•
•
•
1. When the audio system operating, don't unplug the
signal cable, or it will cause damage to the amplifier and
associated equipments.
2. You should wait at least 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 —— Follow the operations as instructed in the Manual.
Parts —— If you are going to use components/accessories not supplied by our company like power cord,
fuses etc please make sure that components/accessories you used are compatible with the safety
requirements. Or it will cause fire or electric shock.
Placement —— Put the amplifier on a flat 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 unauthorized person.
Troubleshooting —— If any problems when you are using the product, please check according to following
tips to look for the possible reason. Please contact our service support department if
you can't solve the problem.
Small Tips
11

12
Please follow the instruction in the manual in order to keep the amplifier under proper working condition. If the
amplifier is not functioning as intended, please check according to following tip to look for the possible
reason.
Troubleshooting
NOTE: is the registered trademark of Zhuhai Spark Electronic Equipment Co., Ltd.
Problem
Cause
Remedy
No sound from
headphone
after power on
Power
Indicator is
OFF.
Power is not connected
Check power cable connection or
power outlet connection
Main fuse is out.
Replace with the same type
and value fuse.
Power
Indicator
is ON.
NO signal input.
Make sure you have selected the
correct source from the front panel
Check if the source equipment is
functioned properly.
Audio cable has not connected
properly
Connect audio cable properly
Headphone has not connected
properly
Connect audio cable properly
Volume at lowest position
Turn up the volume control to
appropriate level
Sound Distortion
Input signal level too high
Turn down the volume to suitable
position
Noise output
The grounding of input signal cable
has not been connected, or bad
contact in input signal cable
Replace properly connected input
signal cable
Components or circuit malfunction
Contact local agent or Cayin service
support for maintenance
Sound stage and imaging
are not in proper
Signal input cables are not
connected correctly
Make sure all cables are connected
as suggested in the manual