HA-300
DIRECT HEATED TRIODE TUBE
HEADPHONE AMPLIFIER
User Manual
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Thank you for choosing Cayin HA-300 Direct Heated Triode Tube Headphone Amplifier
Table of Content ……………………………………………………………………………
Package Contents …………………………………….……………………………………
Product Features …………………………………………………………………………...
Safety Precautions …………………………………………………………………………
Specifications ……………………………………………………………………………….
Daily Care …………………………………………………………………………………...
Warranty Service …………………………………………………………………………...
Preparation ………………………………………………………………………………….
Front Panel Functional Description ……………………………………………………….
Rear Panel Functional Description ……………………………………………………….
Top Panel Functional Description ………………………………………………………...
Installation …………………………………………………………………………………...
Vacuum Tube Substitution ………………………………………………………………...
Connect to Audio Equipment ……………………………………………………………...
Connect to Headphones …………………………………………………………………...
Connect to Speakers ……………………………………………………………………….
Basic Operation …………………………………………………………………………….
Maintenance ………………………………………………………………………………...
Troubleshooting …………………………………………………………………………….
Follow us …………………………………………………………………………………….
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We have inserted protective foam inside the Vacuum Tube Cage in order to protect the
vacuum tubes during transportation. Please remove these foams before you connect the
amplifier into your sound system. Fail to do so might cause serious damage to the amplifier or
disaster such as fire accident.
We have prepared this user manual to help you understand the features and get familiar with
the operation of the amplifier. We suggest all customers read through this manual before they
start to use the device.
Table of Content
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Recommendation
Please keep all packaging materials for future use as you may need to
repackage the amplifier in the future. Please fill in the product warranty card
immediately and mail it to authorized dealer to safeguard your after-sales
service.
Note: Please make sure the AC voltage of your local power supply match the
voltage information printed on the back panel before you power up the
amplifier. Incorrect input voltage setting 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. If the marked voltage is
different from your local power supply voltage, please contact your authorized
dealer or Zhuhai Spark Electronic Equipment Co., Ltd.
Attention: the product package should include only the items in the list above.
Notice
This amplifier is designed, optimized and manufactured by factory designated components.
Cayin reserves the right to void the warranty of the product in case of unauthorized repair,
modification or change to the product, and we shall not responsible to any failure or damage
caused by replacement of non-designated components.
_Package Contents_
Please place the box in upright position according to the marking of the package. Please
examine the product package before you open it, the package should be free from any
physical damage or water stain. You should find the following items when you open the
package:
1. Cayin HA-300 x1
2. Product User Manual (Chinese) x1
3. Warranty Card x1
4. AC Power Cord x1
5. Umbilical Power cable x1
6. Replacement Fuse x2
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_Product Features_
1. Single-ended amplification approach brings out the charm of the tubes with natural and
realistic music playback.
2. Voltage Amplification: one piece of Shuguang WE6SN7 (replica of Western Electric) per
channel
3. Power Amplification: one piece of Full Music gold pins ceramic base 300B per channel
4. Support Balanced (XLR) and single-ended (RCA) input. To maintain single-ended
amplification, balanced input will transform to single-ended through a pair of input
transformer.
5. The output from 300B will feed into a pair of custom design in-house manufactured high
quality EI output transformer for single-ended (6.35mm) or balanced (4-pins XLR)
headphone output.
6. To make sure HA-300 can handle vast variety of headphones satisfactory, the output
transformers are designed to support three sets of impedance matched output (L, M and H).
7. Powerful headphone output, can handle demanding low sensitivity current hungry planar
headphone with ease..
8. Excellent vacuum tube shock absorber implementation provides quiet and realistic playback
from sensitive headphones
9. One set of speaker terminal as alternative output, can be used as an integrated speaker
amplifier with 8W+8W Class A output
10. Outboard power supply provides pure and steady power for the amplification circuit with
minimum interference from power transformer
11. Custom design in-house manufactured high quality toroidal power transformer
12. High voltage power rectification with set of four NOS RCA 22DE4 tubes
13. Exotic multi-stage dedicated power supply approach, reduce interference to signal
amplification effectively through independently regulated power supply for voltage
amplification circuit. Optimize power provision to all circuit and enhance audio performance
significantly
14. Effective design with sensible layout and effective shielding and isolation, the corner stone
for excellent overall performance.
15. Handmade, point-to-point wielding on all circuit,
16. High-Precision 24 steps potentiometer
17. MUNDORF MCap RELY SilverGold premium grade coupling capacitor
18. High quality shielded silver-plated cable for internal wiring, minimize interference during
internal transmission.
19. Detachable vacuum tube shielding cage, easy to detach and install
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WARNING
High Voltage Components
Do not open the cabinet
To avoid electrical shock, please do not remove the cover or back
panel
All repair can only be carried out by qualified technician for repair
To avoid fire or electrical shock, please keep away from water spill
or moisture environment
WARNING
High Voltage Components
Do not open the cabinet
This symbol warns the users that uninsulated voltage within the unit may be sufficient to cause
electrical shock. It is dangerous to make any kind of contact with any part inside the unit.
WARNING
High Voltage Components
Do not open the cabinet
This symbol alerts the users that important information concerning the operation and maintenance
of this unit has been provided. The information should be read carefully to avoid problems.
We recommend customers to use this amplifier under 2000 meters
above sea level and non-tropical climate environment
Safety Precautions_
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. Tube amplifier will built-up it operation temperature after long hours of operation. Please keep the
amplifier at a well-ventilated environment and do not cover the amplifier or blocked the vents.
Poor ventilation will lead to excessively high operation temperature and can cause malfunction or
fire
3. To avoid damaging the amplifier, you must connect a source device to the input terminals before
you select that as the active input of your HA-300.
4. To avoid damaging the amplifier, short circuit among the output terminals are strictly forbidden.
5. Do not attempt to service this product yourself. Opening the cover may expose you to electric
shock or other hazards.
6. Do not attempt to disassemble the machine. Cayin reserves the right to void the warranty of the
product in case of unauthorized repair, modification or change to the product. All service and
maintenance must be conducted by authorized service technician.
7. 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 the amplifier.
8. 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 to clean product.
9. Please handle with care, avoid tempering to the machine
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_Specifications_
Rated Output (Balanced)
1800mW+1800mW(L), 2200mW+2200mW(M), 3700mW+3700mW(H)
Rated Output (Single Ended)
1100mW+1100mW(L), 2400mW+2400mW(M), 5000mW+5000mW(H)
Frequency Range
10Hz～50kHz ±3dB
TH+D
1%(1kHz)
Sensitivity
200mV ~ 440mV
S/N Ratio
100dB (A-weighted)
Headphone Impedance
L : 8~64Ω; M : 65~250Ω; H : 251~600Ω
Headphone Connectors
4pin XLR x1, 6.35mm x1
Rated Output
8W + 8W Class A
Frequency Range
10Hz~60kHz ±3dB
TH+D
1%(1kHz)
S/N Ratio
100dB (A-weighted)
Input Sensitivity
440mV
Output Impedance
4~8Ω
Input Impedance
100kΩ
Input Connector
XLR, RCA
Tubes used
300B x 2, 6SN7x2, 22DE4×4
Dimension
Amplifier: 286mm×368mm×210mm;
Power Supply: 286mm×368mm×210mm
Weight
Amplifier: 20Kg;
Power Supply: 9.5Kg
Fuse
~220V-240V: T1.6AL250V; ~100V-120V: T3.15AL250V
Power Consumption
185W
Working Condition
Temp: 0oC~40oC; Humidity: 20% - 80%
Storage Condition
Temp: -20oC~70oC; Humidity: 20% - 90%
Headphone output
Speaker Output
Others
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